catamaran vs trimaran capsize

Catamaran vs. Trimaran: The Differences Explained

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Most boat lovers know the differences between a catamaran and a monohull. But when it comes to differentiating between a catamaran and a trimaran, things can get tricky because it’s not always clear how much difference the extra hull of a trimaran makes in performance, safety, comfort, and handling. If you’re trying to choose between the two, this is a post you’ll want to read before making a decision.

Besides the number of hulls catamarans(two) and trimarans(three) differ in speed, safety, accommodation, helming, and anchoring. Generally, catamarans are more manageable in a marina and provide better accommodation and comfort. Trimarans, on the other hand, are faster and more fun to helm.

In this post, we’ll cover these differences in greater detail to make it easier for you to choose between a catamaran and a trimaran. First, let’s quickly review each multihull type.

Table of Contents

The Lowdown on Catamarans

Informally dubbed a “cat,” a catamaran is a type of multi-hulled sailing craft with two equal-sized parallel hulls. Cats are typically geometry-stabilized, leveraging their wide beams for stability. That’s unlike monohull boats, which use ballasted keels for stability. Catamarans also have a smaller displacement, lower hull volume, and a much shallower draught ( draft ) than similarly sized monohulls.

The earliest forms of catamarans can be traced way back to the 17th century. They were primarily used for fishing by the Pavaras community in Tamil Nadu, who preferred them over other fishing vessels due to the extra balance and stability provided by the twin hulls. Later on, the British adopted the concept of twin-hulled boats and popularized it worldwide.

Modern catamarans are much more sophisticated than their ancestors. They’ve evolved in terms of the usage versatility, construction, and design, giving rise to two primary configurations:

• Small-Waterplane-Area Twin Hull (SWATH)
• Wave-piercing catamarans

The hulls in a catamaran with a SWATH configuration are typically submerged. That means they’re less affected by ocean waves , which is great for stability when sailing in rough waters. In the recent past, SWATH configurations have been used on research vessels and rescue ships. 

Their wave-piercing counterparts, on the other hand, have low-buoyancy bows fitted on the twin hulls. The bows allow the hulls to puncture ocean waves instead of riding over them, making catamarans with such a design faster on rough waters than SWATH cats. In the recent past, wave-piercing cat designs have been used on passenger ferries, military vessels, and yachts.

The Lowdown on Trimarans

Also known as a double-outrigger, a trimaran is a type of multihull boat with one main hull flanked by two smaller “floats” (technically known as outrigger hulls) connected to the larger hull by lateral beams. Such a design makes trimarans incredibly stable, meaning they’re hard to capsize even in the roughest of waters. 

The earliest forms of trimarans can be traced to the Austronesian people and are still the most common hull design you’ll find on traditional fishing boats in Maritime Southeast Asia. The majority of today’s double outriggers are yachts meant for racing and recreation, but some warships and ferries have this design.

The Differences Between Catamarans and Trimarans 

The most apparent physical distinction between a catamaran and a trimaran is that it has three hulls instead of two. 

But other than that, are there other differences between the two vessel types you need to know? Do those differences make one type better than the other?

To find out, let’s compare the two types of multihulls based on the following merits:

Comfort and Accommodation

A Cat’s geometry is ideal for comfort and accommodation. The two load-bearing hulls provide additional habitable space, and you can always create a sizable nacelle between them. Connected to this central living space is a large cockpit, and there are cabins on either end of the hulls. This arrangement is perfect when you’re looking to relax a bit as the party rages on in the saloon because it gives you a bit of privacy. 

And with flybridges virtually standard on modern catamarans, you have extra space for entertainment and lounging. The deck area is safe for kids, and the fact that catamarans don’t heel much means that you can do things like cooking at ease. Also worth mentioning is that cats can carry a decent load, meaning you can stock up on food and gear when going away for an extended period.

While trimarans do provide a decent degree of livability, they fall short of catamarans in two regards. First, they heel more than cats, making it difficult to do things like cooking on board. Second, they support much less load than catamarans. To put things into perspective, some 45 feet (14 meters). Cats can carry nearly three tons of payloads, whereas similarly sized trimarans can barely support half that load.

Overall, catamarans provide better, more comfortable accommodation than trimarans.

One of the main concerns when choosing any water vessel is how easy it’ll capsize in the event of a storm. If you’re looking to spend more than just a couple of hours on the water, you want to sail on something that won’t capsize/sink easily because sea conditions can sometimes fluctuate within a short period.

When it comes to safety, three hulls are better than two. Having one main hull and two overhangs on each side makes a trimaran more stable because of two reasons. First, the side overhangs widen the beam of the vessel, which minimizes the chances of the boat flipping over when hit by a large breaking wave from the side. Second, trimarans are typically designed with the weight centered on the main hull, further enhancing stability. 

Multihull stability is a complex topic and should be understood in detail if you want to stay safe at sea!

• Why do catamarans capsize?

On the rare occasion that a trimaran flips over, it’ll stay afloat. That means if the worst happens, a capsized trimaran will turn into a potential life-saving raft that’s easier to spot from a helicopter. That’s because almost all trimarans designed in the last decade or so come with closed-cell foam distributed throughout the various parts of the boat to provide reserve buoyancy. 

Thanks to this kind of construction, you could cut most trimarans into pieces, and each would still stay afloat.

While catamarans are typically more stable than monohulls, they’re no match for a trimaran in this regard. Hypothetically speaking, it would be easier to tip over a catamaran than a trimaran if both boat types were subjected to equal magnitude storms. That, however, doesn’t mean that catamarans aren’t safe. They’re still harder to flip over than monohulls and will stay afloat when that happens because they come with the same closed-cell foam found in a trimaran.

While on the subject of safety, it’s worth mentioning that trimarans require less vigilance as far as reefing is concerned . Since catamarans heel less, most of the extra wind force translates to more “push” on the rig, increasing speed. But because the pressure exerted on the sail nearly quadruples when the wind speed doubles, you need to be extremely careful when timing your reef to keep a cat sailing flat. 

The same goes for reefing a trimaran, except that the slight heel gives you more room for error in terms of the timing.

Most people who’ve ever steered both a trimaran and catamaran will agree that the former is more fun to sail. Most light trimarans, especially tiller-steered ones, have a terrific response to the helm. They have a slight heel that somewhat feels like a monohull, but the angle is a bit limited.

A catamaran is stable, but it doesn’t heel. While heeling may be frowned upon by people who prioritize comfort and accommodation in a boat, it’s one of the most exciting parts of sailing. With three hulls to ensure stability, trimarans combine the heel of a monohull with a catamaran’s stability to deliver the best sailing elements of monohulls and multihulls in a single package.  

Considering that trimarans are more stable, you may be better off with one if you’re looking to have some fun as you perfect your helming skills.

Speed is another area where trimarans outperform their twin-hulled counterparts. Typically lighter than catamarans, trimarans need less sail distance to hit double-digit speed averages. A trimaran can maintain a formidable course up-wind when fitted with centerboards/daggerboards (as is often the case for modern models).

While a catamaran is still faster than a monohull of identical size, it falls short of the trimaran in terms of sheer speed. Understand that this doesn’t make catamarans slow boats; it’s just that tris are typically designed with more emphasis on performance.

Why are Trimarans Faster Than Catamarans?

Trimarans are easier to anchor than catamarans because they allow you to keep the ground tackle in and deploy it from the main hull. 

However, catamarans are more maneuverable and manageable in a marina. They also handle docking lines more conveniently.

Catamarans vs. Trimaran: The Verdict

In summary, here’s what the differences between a cat and tri mean for anyone trying to choose between the two: A catamaran is a better choice if you’re looking to accommodate many people on board for something like a party because it’s more spacious and comfortable than a trimaran. On the other hand, a trimaran is an ideal choice for speed junkies and individuals looking to push their sailing skills to the next level on every stable platform.

Hopefully, that has cleared the air and made it easier for you to pick a more suitable option for your sailing needs.

• ResearchGate: A comparison of the motions of trimarans, catamarans and monohulls | Request PDF
• Why are trimarans faster than catamarans?

Owner of CatamaranFreedom.com. A minimalist that has lived in a caravan in Sweden, 35ft Monohull in the Bahamas, and right now in his self-built Van. He just started the next adventure, to circumnavigate the world on a Catamaran!

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TRIMARAN VS CATAMARAN

Trimarans and catamarans have a unique appeal. They are stable, fast, and comfortable. Yet, it can be hard to choose between these kinds of vessels, if you have the budget to charter or buy either.

In this article, we delve into the trimaran vs catamaran debate to establish the pros and cons of both. But first, let’s look at the key differences between them.

What are the differences between trimarans and catamarans?

A trimaran has one main, larger hull flanked by two smaller “floats”, connected by lateral beams. It’s rigged similarly to a monohull and heels. The extra hull offers less hydrodynamic resistance, which makes a trimaran faster.

Catamarans have two equal-sized parallel hulls; their wide beams offer stability. That’s why cats don’t heel.

Catamarans have become extremely popular over the past decades, especially once bigger, more comfortable models have been produced since the 90s. So much so, that there’s a rather long waiting list to get a new one built. Charter companies are purchasing more and more cruising cats to add to their fleets and many cruisers choose a cat over a monohull when they set sail on a long voyage.

Trimarans have been associated with racing only, until recently. However, new and rather spacious recreational models are slowly emerging. Finding a cruising trimaran to charter is still hard, though. 

Can a trimaran capsize?

In theory, in extreme conditions, if a wave is higher than half the beam size of the boat, a trimaran can capsize. However, trimarans are rather wide vessels and their three-hull configuration makes them very stable. 

A trimaran has a maximum righting moment of 27 degrees of heel, while a catamaran has a 12 degree one. Such a shorter angle can be reached in short seas, if the wind gusts are powerful enough and you haven’t reefed. 

So capsizing a trimaran is extremely hard. Plus, if a trimaran flips over, it is virtually unsinkable, thanks to the three hulls. This extra safety element has led to trimarans becoming more popular than catamarans in the racing world.

Is a trimaran safer than a catamaran?

To a small extent. As we have seen above, it’s very difficult to sink a trimaran. The same goes for cats. However, trimarans have the added bonus of being harder to flip over, too. 

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Pros and cons of Trimarans

Let’s look at the advantages and disadvantages of trimaran sailboats.

Trimarans are very fast, typically faster than both cruising and racing catamarans

They can sail in nearly any wind conditions

Trimarans are extra stable and hard to flip over

The heeling allows you to understand when it’s time to reef

Trimarans perform better upwind than cats

The helm offers great feedback, just like on a monohull

The anchoring gear is easier to deploy, as it’s installed on the main hull.

Sailing a trimaran takes quite a bit of work on deck

They heel, making it harder to cook underway

Trimarans can be harder to maneuvre inside a marina

The space on board is typically less than on most cats

Trimarans are very weight sensitive.

Pros and cons of catamarans

Catamarans, on the other hand, have their own pros and cons.

Cats offer a stable platform underway and at anchor

Maneuvering a catamaran is very easy

Modern, cruising cats, feature lots of room above and below deck

Catamarans don’t heel

Cruising catamarans can bear a decent amount of load.

Racing cats aren’t very spacious

Catamarans can be capsize more easily than trimarans

You need to reef more often on a cat

Any catamaran is slower than a trimaran

The helm isn’t very responsive - you need to pay close attention to the instruments.

The verdict: Trimaran or catamaran?

As always, when it comes to boats, there isn’t a “better option”. A vessel needs to be tailored to the needs and preferences of her owner. 

If you prefer sailing a beautiful, spacious platform, on which to cruise leisurely and entertain many guests, a cruising catamaran may be the choice for you. You won’t need to handle the lines and halyards quite as often, you won’t heel, but you will travel slower.

If, on the other hand, you enjoy the thrill of high speeds, but you’re worried about safety, a trimaran may be right for you. A recreational trimaran fitted with daggerboards or centreboards can typically sail faster than a catamaran and perform better upwind. 

A performance cat may be a great option for those who need to get in and out of marinas often but want to sail fast. And if you want the fastest, most fun boat to sail, opt for a racing trimaran. 

Whatever your priorities, a boat that’s the perfect balance between them all exists. Although, of course, you will need to take budget into consideration.

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Trimaran vs Catamaran: What are the Differences?

The debate between trimarans and catamarans has been raging for years, with no clear victor in sight. Despite their long-standing popularity as cruising vessels, trimarans have seen a resurgence recently – but what sets them apart from catamarans? The subtle differences lie mainly within the hulls; while monohulls are distinguishable several yards away, distilling one multihull from another requires closer examination of characteristics such as living space size accommodations, seaworthiness ratings , speeds achieved on test runs.

With these variables to consider – along with personal preference – deciding which vessel is right may be difficult indeed!

Performance and Stability: two distinct sailing experiences

The stability of a catamaran vs a trimaran.

When sailing on a monohull in strong winds, the boat can potentially capsize due to its single hull and lack of floatation. On the other hand, multihulls such as catamarans are more buoyant because they have two floats that help prevent immersion; however it still may be uncomfortable when navigating heavy seas. For the most optimal sail experience with great stability even through rough waters–pleasure trimarans provide an ideal combination! Three connected hubs act like small wheels over rippling waves while providing excellent comfort aboard no matter what conditions lie ahead!

Read also : Trimaran our ultimate guide

The wind and its influence on the performance of multihulls

In sailing, trimarans outperform catamarans in a headwind situation. Their unique hull design features both daggerboards and central weight focus which allows them to counteract the thrust of wind better so as to stay on course rather than drifting away like their counterparts do. This subtle difference makes significantly more efficient vessels resulting in overall faster speeds when heading into the wind – making trimiras an ideal choice for less experienced sailors seeking reliable performance!

Looking beyond traditional catamaran styles?

Trimarans such as DragonFly boast amazing features thanks to its “Swing Wing” system while Rapido Trimaran offers “an experience like nothing else”—thanks in part due to Morrelli & Melvin architect firm constructing this Vietnam built masterpiece!

For those seeking a luxurious floating lifestyle, the trimarans from shipyard NEEL are second to none! These vessels feature ‘Cockloon®’ areas which seamlessly connect saloons and cockpits – providing uninterrupted living spaces with breathtaking panoramic views. Alongside this is an expansive flybridge offering extra room along with comfortable cabins nestled within their own designated floats for ultimate relaxation. You could say that these modern marvels of engineering provide all you need in one single package – now it’s just down to choosing your destination!

Looking for the perfect blend of stability, comfort and interior space? Look no further than the NEEL 65 – a unique trimaran that boasts roomy cabins thanks to its enlarged volume. Not only does it offer more living area compared with typical catamarans – but also features an optimally aligned central hull which provides extra safety at anchor! So if you’ve been in two minds between these nautical vessels; perhaps this could sway your decision once and for all…

Trimaran vs catamaran safety: the width of trimarans makes them safer

The trimaran stands out as the most secure of its multihull contemporaries. Its superior design consisting of three hulls, effective anti-drift strategies and centre-mounted weights combine to provide it with a groundbreaking 27° righting moment – allowing for excellent stability in even gusty weather or choppy waters. In comparison, catamarans offer just 12° degrees protection against capsize – meaning that the trustworthiness offered by a trimaran is hard to match! Further punctuating this remarkable level of security are features such as buoyancy tanks which ensure that if capsizing does occur, sinking will not be an issue: making trimarans perfect vessels for sailing’s safety conscious connoisseurs.

Racing trimarans

In the last decade, trimarans have surged in popularity for racing purposes due to their enhanced speed and safety capabilities. Their stability on rough seas allows them to be pushed further than catamarans can go without sacrificing control of the vessel; this is why most multihull races since 2010 have been captured by a trimaran! The Jules Verne Trophy has not seen any different – all winners since its start in 2010 are proud owners of these three-hulled vessels.

How to make the right choice between a monohull, a catamaran, and a trimaran?

No matter what sailing adventure you have in mind and the destination, it is essential to select a vessel that will fulfill your dreams while meeting all of your demands. Make sure to pick wisely!

Choose a monohull sailboat if you like sailing!

Nothing quite compares to the feel and freedom of a sailing adventure aboard your own monohull sailboat. With its large, retractable keel, you can explore shallow waters where other boats may not venture while taking in stunning vistas from beyond the coastline. Enjoy an unforgettable experience with every rustle of wind across your sails!

Read also : Monohull vs Catamaran, which one to choose?

Pick a catamaran if you like volume and calm seas

TThe catamaran is perfect for adventurers seeking the tranquility of sailing with family and friends. With a spacious interior, multiple cabins equipped with bathrooms, and an enviable amount of storage capacity above 12m in length – it’s easy to see why these boats have become so popular! However when navigating more turbulent seas keep in mind that their windward grip may make maneuvering tricky; but Catana’s boat selection has you covered thanks to its range featuring daggerboards allowing captains ultimate control over any situation.

Pick a trimaran for a good combination of volume and performances

For those looking for a sailing experience like no other, trimarans are the perfect answer. They offer lightning-fast speeds and truly exhilarating performances on open waters – all while providing plenty of roomy living space comparable to catamarans of similar size! Whether you’re attempting an adventurous transatlantic crossing or simply want to enjoy some pleasant cruising around the world, selecting a recreational trimaran could be your best bet.

Enjoy cruising on the NEEL 51 , a unique charter yacht that offers plenty of space without sacrificing performance. This trimaran-inspired vessel is perfect for travelers who want to explore new destinations quickly and safely — with speeds twice as high as other options!

  Read more: LEEN 72′: The Future of Hybrid Trimarans is Here .

After looking into the differences between catamarans and trimarans, we can conclude that they each offer distinct sailing experiences. Catamaran sails offer a sense of comfort and stability for extended cruising trips and luxurious living spaces, while trimarans are better on performance, safety – due to the increased width of their hulls – and speed when racing. Ultimately though, it all comes down to personal preference when it comes to choosing between a monohull, a catamaran or a trimaran. If you want to gain speed and enjoy the thrill of racing, then a trimaran may be your best option; however if you prefer comfort and more space while cruising, then a catamaran may be more suited for your needs. Whichever you ultimately decide to purchase, just make sure that it fits your specific circumstances and requirements.

If you’re looking to buy a trimaran, don’t miss this opportunity to learn about the latest models and their features. Get the inside scoop on what to look for in a trimaran and what you can expect to pay. Find out how to choose the right size and style to meet your needs and budget. And if you’re looking to sell your trimaran, don’t miss this chance to connect with a global audience of interested buyers. Showcase your boat’s unique features and benefits and reach a wider audience of potential buyers.

So don’t wait any longer! Take advantage of this opportunity to learn more about buying or selling trimarans. Whether you’re a seasoned sailor or just starting out, this is your chance to dive deeper into this exciting world of boat ownership. Click the link below to get started today!

Whether you’re a fan of stability or speed, there’s one boat that can give you both – the trimaran vs catamaran. Catamarans provide plenty of living space and comfort in calm waters but struggle with choppy seas, while modern trimarans deliver excellent performance even on rough days yet still offer good room to relax onboard. But if vintage sailing is more your style opt for an older-style tri since it won’t be equipped with as much creature comforts!

Catamarans and trimarans are two types of watercraft that rapidly cut through the waves, but when it comes to speed one stands out above the rest. Trimarans have gained a reputation for being fast enough to take on any other vessel in a race – making them an excellent choice for anyone looking to shave precious seconds off their time!

When it comes to safety on the sea, two of the most popular vessels are Trimarans and Catamarans. Thanks to their side hulls, trimarans offer a much greater heeling angle compared with catamarans – meaning they’re less likely to capsize or sink in rough waters. However don’t let that put you off taking out a catamaran – while not as secure as its three-hulled cousin – these craft still provide plenty of stability for your seafaring adventure!

If you’re looking for an affordable seafaring vessel, the choice between a catamaran or trimaran can be daunting. With numerous factors that impact cost – from age and length to comfort levels and desirability – it’s often hard to tell which of these two sailing vessels will fit your budget best. But with some research, you’ll find just the right combination of affordability and quality suited perfectly to your needs!

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Trimaran vs Catamaran

Trimaran and Cataraman are quite similar in design, making it difficult for many people to distinguish between the two, let alone choose one. However, you might be surprised to know that their differences are rather significant.

In this post, we will compare the Trimaran and Catamaran so that you can clearly identify them and make an informed decision when purchasing one.

About Trimaran boats

About catamaran boat, so, which boat do you think is better.

A Trimaran is a type of boat that has three hulls instead of the usual one. The front and back hulls are usually small and used for stability, while the middle hull is larger and used for most of the boat’s functionality.

Some Trimarans can also be configured to be sailed as a Catamaran by removing the front and/or back hulls.

Trimaran boats have several unique features that make them better suited for certain tasks than other types of boats.

• Trimarans are more stable in rough water than other boats, and they are often used for racing or long-distance sailing
• The extra hulls make Trimarans more stable and less likely to capsize in rough water
• They also provide more space inside the boat for passengers or cargo and can be faster and more maneuverable than other boats of similar size
• Trimarans are also good for sailing in shallow waters since they can float on two hulls while the third one is still submerged

Despite their advantages, Trimarans do have some drawbacks.

• They can be more difficult to dock or more than other boats, and they require more crew members to operate effectively
• They are also more expensive to build and maintain than other boats

However, for those who are looking for a fast, stable, and versatile boat, the Trimaran is a great option.

Catamaran boats are a type of boat that has two hulls, making them comfortable vessels to ride.. They can also be more comfortable to ride in than other types of boats.

Here’re some of this boat’s advantages:

• Catamaran boats can be sailed by a smaller screw than other types of boats. This also makes them a popular choice for charters and sailing vacations
• Their prices are more affordable, thus suitable for family use
• Catamarans are usually built from lightweight materials, making them ideal for speed and agility
• The most distinguishing feature of a Catamaran boat is the lack of any external rigging. This means that the sails are mounted on the mast and boom directly to the hulls, rather than to a frame that hangs below the hulls
• Therefore, they have a great range of sail shapes and sizes, which can be adapted to changing wind conditions
• Another advantage of a Catamaran boat is its stability. Because the hulls are wide and shallow, they offer more resistance to overturning than a monohull boat of the same size. This makes Catamarans an ideal choice for sailing on rough seas

However, Catamarans do have a few drawbacks.

They are less agile than monohull boats, making docking in confined places more challenging

• Docking these boats is costly
• In big waves, there is a chance of slapping

• Speed – The Trimaran is the faster of the two boats. It can reach speeds of up to forty knots, while the Catamaran can only reach about half that speed.
• Stability – The Trimaran is more stable than the Catamaran. This is because it has three hulls instead of two. This makes it less likely to capsize in rough seas.
• Space – The Catamaran is bigger than the Trimaran. This means that it can hold more people and cargo. The Catamaran can also be used for longer trips, while the Trimaran is better suited for shorter trips.

A Trimaran is a multi-hull boat with three hulls, while a Catamaran has two hulls. Both types of boats can be made from a variety of materials, including wood, aluminum, and fiberglass.

More Stable and Ideal for Racing: Trimaran

The main advantage of a Trimaran is its stability in rough waters. Catamarans are also stable boats, but they are not as resistant to strong winds and waves as Trimarans.

Trimarans also typically have more deck space than Catamarans, which makes them ideal for sailing or fishing trips.

A Trimaran is typically faster and more stable than a Catamaran, making it ideal for racing or long-distance travel. A Catamaran, on the other hand, is better at handling rough seas and is more agile.

Ideal for Calm Water: Catamaran

Catamarans are usually faster and less expensive to build than Trimarans, making them a popular choice for recreational boaters. However, due to their size, Catamarans are not as seaworthy as Trimarans and are not recommended for use in rough waters.

Trimarans and Catamarans are both types of sailing vessels . They have many similarities, but there are also some important differences between them. If you’re interested in learning more about these boats or in purchasing one for your use, it’s important to understand the pros and cons of each type.

Overall, the Trimaran is the better boat. It is faster, more stable, and has more space. However, the Catamaran is cheaper and can be used for longer trips. If you are looking for a boat that is good in all areas, the Trimaran is the best choice.

Hopefully, this article has helped you do that. Thanks for reading!

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Trimaran vs. Catamaran: What are the Differences?

Experience the thrill of sailing on a multihull – a boat with two or three hulls. Discover the unique features of the trimaran and the catamaran , and how they differ in performance and comfort. Want speed and excitement? Take the helm of a trimaran. Prefer a leisurely cruise? Relax on a catamaran. Don’t miss out on this exciting article uncovering the secrets of multihull sailing.

How to recognize a trimaran from a catamaran?

First up, the catamaran. Simple, sleek, and stylish, this craft boasts not one, but two identical hulls – making it a twin amongst ships. Its minimalist design is a thing of beauty, and it might just be the perfect float for solo explorers or couples seeking a romantic ocean adventure.

On the other hand, the trimaran is a multihull masterclass in innovation. With a total of three hulls, including two small outriggers, this vessel’s design is unlike anything you’ve seen before. In fact, some have compared it to a spaceship, and we can see why! The trimaran’s unique layout and engineering wizardry make it a worthy addition to any seafarer’s fleet.

So, whether you’re a catamaran connoisseur or a trimaran trailblazer, there’s no denying that these vessels are truly remarkable. Just don’t ask us to choose a favourite!

What are the trimaran main characteristics?

A trimaran’s three hulls are like the training wheels on a bicycle, making it incredibly stable even in choppy waters. These recreational boats are a sailor’s dream, offering a smooth ride and exceptional comfort. And when it comes to safety, trimarans are virtually unsinkable due to their triple-hull design – even the roughest storms won’t capsize them! Although compromising some sailing capacity, the security and stability of a trimaran are unmatched.

All about Neel trimaran here

What are the catamaran main characteristics?

Discover the one-of-a-kind world of catamarans – versatile vessels affectionately nicknamed “cats”. Offering an exciting and luxurious sailing experience, these boats come in a range of sizes, from cozy two-person cabins to expansive group accommodation for up to 20. Some catamarans are budget-friendly options perfect for families, while others provide the ultimate indulgence and can transport you to some of the most coveted destinations in the Caribbean and Mediterranean. With their roomy interiors and stable design, catamarans are perfect for exploring calm sea gulfs, lagoons or shallow waters.

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Trimaran vs. Catamaran: which one has the largest surface area?

Catarmarans surface area is known to be spacious

Catamarans have filled the world’s oceans in recent years with more huge and luxury versions, including sailing catamarans like the Lagoon Seventy 7, Fountaine Pajot’s Allegria 67, and motor catamarans like the Sunreef Power 70. The biggest catamaran known is Hemisphere, and you may want to have a look at Douce France available for charter with WI.

Catamarans are well-known for their large living quarters, which are divided between the two hulls and the central platform.

Trimarans surface area are constantly improving

Among some of the cruising, habitable trimarans, the DragonFly boasts a unique Swing Wing system and a plush interior, while the Vietnamese-made Rapido Trimaran is the brainchild of the esteemed Morrelli & Melvin design house. But what really sets the Naval NEEL shipyard trimarans apart is the incredible “Cockloon” living area above the central hull – it’s like staying in a floating hotel! With cabins located solely on the floats, the central kitchen, panoramic saloon, and lounging areas are all linked together for an unbeatable sense of space and luxury. And don’t forget the expansive flybridge, too!

Read also : The yacht charter experience ladder

Trimaran vs. Catamaran: Stability and Performance

The Trimaran stability made it famous

With three hulls, including one main and two overhanging, a trimaran is built for stability even in the roughest waters. In fact, it’s nearly impossible for a trimaran to capsize, making it a safer option for the adventurous seafarer. And if by some chance or circumstance the boat does flip, fear not – it’ll stay afloat! The only downside? The trimaran provides both the comfort of a monohull and the safety of a multihull, but hey, no boat is perfect. Did we mention it’s also one of the fastest boats out there? Sounds like a win-win to us.

The Catamaran performances aren’t as versatile as trimaran

Catamarans are incredible vessels that offer not only a smooth sailing experience, but also a comfortable ride. Ranging in size from cozy cabins for two to massive ships that can fit 20, catamarans are top-notch for stability. However, they aren’t particularly cut out for rough seas, preferring calm waters like tranquil gulfs and shallow lagoons. Keep in mind that while they may not excel in upwind sailing and lack the heeling abilities of other boats, catamarans will still take you on a sailing adventure like no other.

Trimaran vs. Catamaran: Distinct Sailing Experiences

Sailboats rely on wind speed to move forward, but stability is crucial to avoid capsizing. Monohulls have a keel underneath to prevent this, making them more durable in heavy winds. Meanwhile, multihulls such as catamarans offer greater stability with their floats, resulting in a smoother ride even in rough seas. However, trimarans are more similar to monohulls and may tip more, offering advantages in rougher waters but less comfort on calm days. Overall, multihulls have an edge in stability compared to their monohull counterparts.

Trimaran vs. Catamaran: Safety

Trimarans are very safe boats.

You might be surprised to find out that Trimarans are extremely safe; in fact, many trimarans, are almost unsinkable. They have a core made up of foam, and the materials’ buoyancy is extremely high in comparison to the boat’s displacement. Trimarans are safe because of their breadth. The trimaran is the safest of the multihulls because of its three-hulled design, weight centering, and complete anti-drift scheme.

Moreover, even if the trimaran were to overturn, the structure would keep it from plummeting into the water, making it an extremely safe boat.

Catamarans safety is still very good

Catamarans are a safe way to travel the ocean. Offshore, catamarans are often far safer than monohulls of similar size. Enhanced resilience, speed, steadiness, and motion ease due to a lack of ballast all contribute to safety.

A large modern catamaran has an outstanding resilience and roll inertia. The mix of these factors makes invasion or capsizing extremely unlikely. When a 20-foot wave hits a catarmaran’s beam, the boat will just surf sideways.

Trimaran vs. Catamaran: Racing

Catamarans are very fast downwind

Catamarans are recognized for their velocity, and some of them are capable of breaking world sailing records. Catamarans may travel at a pace  of 15 to 30 mph, with the best reaching speeds of well over 60 knots.

Cruising catamarans may reach high speeds of 15 knots, or 17.3 mph, on average (27.84 kph). In the right wind conditions; however, some outstanding racing catamarans can reach a pace of up to 30 knots.

On downwind runs, reaches, and broad reaches, catamarans are typically quicker than trimarans. Sailing a catamaran is less exhausting than sailing a trimaran. Sailing flat has a number of benefits. Carrying tanks and other diving equipment is significantly simpler on a cat if you are a SCUBA diver.

Catamarans are lighter than trimarans because they do not require a heavy keel. This, along with the fact that their sails are placed equivalent to the wind, allows them to sail quicker than trimarans, particularly on a run or broad reach.

Trimarans are the usual racing winner

Trimarans are frequently preferred in racing these days, especially in the previous decade or so.

For long offshore races, racing trimarans’ speed and safety qualities have significant benefits. Even in severe seas, they can be pushed harder and are more forgiving than other racing catamarans. These are the primary reasons why trimarans have become so popular in recent multihull competitions. Trimarans, for example, have won the Jules Verne Trophy every year since 2010.

Trimarans can often increase their monohull sailing speed on almost every point of sail while cruising catamarans are usually 25-30 percent faster than a sailing monohull of the same length. Of course, when the boats are filled for cruising, these comparisons vary drastically.

A trimaran is more suited to sail upwind than a catamaran, which is more vulnerable to drifting. Trimarans are; therefore, quicker than catamarans, and this benefit is especially noticeable when cruising against the wind due to the weight centering in the middle hull, which lowers pitching.

The third hull really makes trimarans considerably quicker than any other hull form at a given extent based on the relation between a boat’s waterline length and speed i.e. that more hull distance in the water leads to higher speeds.

Which is Better: A Trimaran or a Catamaran?

If you want to spend less time on deck, a catamaran is a great option. Catamarans are also ideal for hosting gatherings and parties while maintaining their stability on the water.

A trimaran is a more ideal boat for you if you want to develop your sailing talents on something more difficult. Moreover, if you’re a speed demon, keep an eye out for the fastest trimaran boats and pick the one that best meets your needs.

While picking between a catamaran and a trimaran appears simple on paper, it becomes more challenging when you see them in front of you. Check out our page for more details in order to make a more informed decision.

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Trimaran vs Catamarans (updated 2022)

The different types of multi hull sailboats can be confusing to people new to the sport of sailing. Here we look at the main types of boat and list out the pros and cons of each.

Key differences between Trimaran and Catamaran

• This one is fairly obvious! A trimaran has 3 has hulls, a main hull with 2 outriggers and a catamaran just has 2 hulls.
• A trimaran is much more stable than a catamaran, with the outriggers (also called amas) acting like training wheels on a bicycle.
• A trimaran is a more suitable boat for beginners to start sailing in, due to the stability and ease of use when compared to a catamaran.
• When catamarans heel, one of their hulls leaves the water resulting in a loss of stability and potential capsize.  With a trimaran, the main hull remains in the water, with the leeward ama providing a predictable increase in righting moment and reliable stability
• Trimarans are faster than catamaran as a trimaran has less hydrodynamic resistance than the catamaran (just check sailing speed records)
• A trimaran is more suited to sail upwind than a catamaran, especially if it has a centreboard like Meermark trimarans do
• The main hull of a trimaran allows for a comfortable seating position vs a catamaran where you are just sitting on the trampoline that connects the 2 hulls

Trimaran vs Catamaran - which to choose

We think given the extra stability, comfort and speed offered, you should opt for a trimaran. Meermark offers both single and two person trimarans - why not look at the specifications of our models and see why a Meermark trimaran is likely to be your best option.

Catamaran Vs Trimaran

Last Updated by

Gabriel Hannon

August 30, 2022

As boatbuilders make faster and more luxurious multi-hulls for cruising and racing, it is time to settle the debate: Catamarans vs. Trimarans.

Catamarans and trimarans have distinct characteristics regarding comfort, sailing performance, safety, and personal preference. The dual- or tri-hull designs both confer significant advantages over traditional monohulls and each fill an amazing niche in the sailing world.

Though both are based on traditional Austronesian outrigger canoes, the dual-hulled catamarans and tri-hulled trimarans have distinct design goals that make them ideal for very different purposes, and it is important to take into account your goals when trying to decide which to sail! We’re going to discuss both types as they rate across performance, safety, comfort, and possible uses. There is no one solution to this age-old problem, but we can help you understand which design is best for you!

From boatbuilder releases to the history of their development, it is important to access lots of sources when trying to make this decision. As a performance sailor, my heart is always in the speed and upwind abilities of the trimaran, but modern catamarans are dynamic and incredibly comfortable. Still, in my opinion, anything that gets you on the water is a great boat, so let’s find the right one for you!

Table of contents

‍ Sailing Performance and Safety

While most traditional boats over 20 feet are monohulled keelboats, there are major limitations to the type of sailing you can do with a monohull. First of all, monohulls depend on their keel to keep them upright, which is effective, but the force of the wind almost always causes the boat to heel to leeward by angles of up to 25° under reasonable cruising conditions, which can be quite uncomfortable for the crew! This design, which relies on giant lead ballast in a deep-set keel, is vulnerable to capsizes and, in drastic cases, sinking.

Additionally, the single-hull only provides so much volume for accommodation and storage, while the more horizontal layout of the multi-hulls can increase cockpit and cabin sizes substantially. Beyond that, both types of multi-hull can experience higher speeds at a given hull length than monohulls.

So how do cats and tris compare to each other? Well,

Catamarans: Stability and Ease

With their dual ‘pontoons,’ Catamarans make use of their floats to always remain on a flat and consistent angle of heel, rarely sailing under more than 10° of heel. This distribution of floatation also makes it nigh on impossible for them to capsize, though the distance between the hulls can make it a problem in the rare cases that they do flip. They do suffer a bit from not having any wetted surface underneath the center of effort, causing them to slide sideways while sailing upwind and making it difficult for them to beat tight angles to the breeze. While they make up for this with speed on the reach and downwind, catamarans are an inferior option for trying to make progress upwind in heavy sea and wind conditions.

These tradeoffs do come with some advantages. Unlike monohulls, catamarans have very shallow drafts, allowing cruisers to sail close to shore without concern, and their common dual-motor design allows them to maneuver incredibly well in tight spaces with a built-in backup for single-engine failure. They heel minimally because of the horizontal distribution of weight, and this means that they are incredibly stable and comfortable while underway or at anchor. In addition, their sail plans and maneuverability characteristics do make them easier to sail with a smaller crew, requiring fewer highly experienced sailors in your party.

Trimaran: Speed and Safety

While traditionalists have finally come around on the aesthetics of the dual-hulled catamaran, the tri-hulled lines of trimarans can still be a bit of a shock to viewers. They combine the vertical stability and upwind capabilities of a monohull with the speed and lateral stability of a catamaran.

When it comes to performance sailing, modern trimarans are well ahead of any other hull design. Due to the relationship between speed and the ‘waterline length’ of a boat, i.e. that more hull length in the water leads to higher speeds, the third hull actually makes trimarans drastically faster than any other hull shape at a given length. Most current speed records, including those for circumnavigation, instantaneous velocity, and single-day distance, are held by Trimarans. In competition, the 2013 America’s Cup is a perfect example of the superiority of Trimarans over Catamarans in terms of speed, as the challenging Trimaran from Golden Gate Yacht Club handily beat the defending Spanish Catamaran in a best-of-three series. With their signature central hull, they can make better upwind progress without drifting and often heel even less than contemporary catamarans.

Further, trimarans far outclass both catamarans and monohulls in terms of safety. The central hull gives the trimaran that signature central righting moment from monohulls, while its winged pontoons provide it the lateral balance that makes catamarans so safe themselves. Combined, this gives a modern trimaran a righting moment of 27°, which is almost impossible to reach in any breeze condition because of the pontoons. For a comparison, modern cats can only maintain 12° of heel before flipping, which is not entirely uncommon in heavy seas.

Therefore, in a purely technical sense, trimarans are safer, speedier, and more rewarding. Still, to reap these benefits you often need to be a little more prepared to engage with the more advanced aspects of sailing, and the tri-hull design does make some sacrifices in other areas.

Though performance is an important metric for all sailboats, every added knot of speed or degree of heel comes at a price of comfort, and it is here that we need to consider the full implications of that cost for both cats and tris.

Catamaran: The Ideal Platform

When it comes to comfort, space, and luxury, it is hard to bet against the catamaran. Because of the geometry of the dual deep hulls and built-up central platform, catamarans offer the ideal vessel for a large crew, a party yacht, or a comfortable getaway vessel. They heel minimally, are highly stable at anchor, and the central platform can be carefully built to maximize the area between the wings. Most catamarans can offer the living space and horizontal area of much larger monohulls, making it the ideal choice for a pleasure cruise.

Trimaran: The Cost of Speed

For all their advantages in terms of performance, the hardware required for the central hull subtracts substantially from the accommodations that are available for a cat of the same size. New trimarans, like the Neel 51 which made waves back in 2017, are pushing back against this perceived comfort gap, the large central hull with the two performance-oriented wings does make it harder for tris to haul the same amount of weight and provide comparable space as most cats.

Preferences

The beauty of modern sailboats is that design advances in both catamarans and trimarans make it possible for all sailors to find the exact right boat for them. Speed demons who want to sail tight to the wind and feel that rush may find themselves enticed by the capabilities of the newest Trimarans, while cruisers looking to get the biggest space for the length are still thrilled by how fast and stable modern Catamarans are off the breeze. While no one would complain about being invited to a cruise on a new Trimaran, you can certainly fit more of your friends in the spacious decks of a Cat.

Both multi-hull styles excel at maneuvering in small spaces and shallow waters, perfect for island hopping or inland sailing. Their wide platforms, which can run a slightly higher cost at marinas than comparable monohulls, enable stability without sacrificing performance. Both are regarded as incredibly safe in nearly all conditions, though Trimarans do have the slight edge in truly nasty weather.

In the end, it all comes down to how you want to sail and what is going to make a good trip successful! For those looking for a leisurely cruise with a minimum of work and a maximum of space, find the most spacious catamaran you can, and don’t worry about missing out on speed as you’ll more than hold your own off the breeze. If you’re excited to go fast no matter what direction the wind is coming from, with the knowledge that you’re nigh on unsinkable, a performance trimaran is the way to go!

Happy Sailing!

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I have been sailing since I was 7 years old. Since then I've been a US sailing certified instructor for over 8 years, raced at every level of one-design and college sailing in fleet, team, and match racing, and love sharing my knowledge of sailing with others!

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Trimaran vs. Catamaran: Which is Better?

Most Popular , Yachting

Published September 26, 2023

The majority of boat enthusiasts have experimented with various types of boats. There are so many options that it’s nearly hard to determine which is the “greatest” or “ultimate” boat. It’s entirely up to personal preference, weather conditions, and your objective. Now let’s find out which is better, trimaran vs. catamaran.

Monohulls Are Out of Trend

If you want to improve your sailing skills fast, there is nothing better than sticking to a small monohull and learning everything it offers. Monohulls are conventional boats, the type we are accustomed to in the Western world — a single long hull with a sail protruding from the center. While most boats in Europe are monohulls, the popularity of multihulls has recently increased. 

There are various reasons, but the primary one is that modern people do not want to spend their time on the boat doing too much work. Why bother when you can simply lay back, relax, and allow the wind to care for itself?

Regular monohull sailing yachts are notoriously difficult to steer, and if something goes wrong, they fall to the bottom of the water, becoming nothing more than a fish apartment. Multihulls — trimarans and catamarans – are non-sinkable, making them highly safe and easy to operate.

Trimarans, like catamarans, are multi-hulled watercraft. As the name implies, they have a second hull compared to catamarans. The trimaran’s three hulls make it entirely unsinkable.

Thus, even in the worst inclement weather, the risk of capsizing is minimal. And even if the trimaran turns over, it will remain afloat, transforming it into an ideal life raft. This is helpful information while out sailing, and it should be reassuring. And if the worst-case scenario occurs, i.e., capsizes , the trimaran will be easily visible, particularly from a helicopter.

Trimarans are also more enjoyable to sail since they have a large hull in the center and two small hulls on either side. Thus, they combine the advantages of a monohull with the stability of a catamaran, effectively combining the best of both worlds. 

You’ve almost certainly seen a catamaran or two in your life. They are uncomplicated vessels, yet they look great. Catamarans have two hulls rather than one, so they are called multihulls.

Numerous advantages accrue as a result of the more excellent stability indicated previously. 

The smaller vessels are enjoyable to sail and may hold between 2 and 10, 15, or even 20 people. Then there are the larger catamarans, which can carry up to thirty people. These may be seen across the Mediterranean and a few other locations, where they are used as tiny ferries. (Related: Catamaran vs. Monohulls: Pros and Cons )

Trimaran vs Catamaran: The Differences

When comparing trimarans and catamarans, there are several key differences to consider:

Trimarans tend to offer greater stability compared to catamarans. Trimarans have three hulls, with outriggers acting as stabilizers, providing a stable platform even in rough seas.

Maneuverability

Catamarans are easier to maneuver due to their twin hull design. They can make tight turns and navigate shallow waters with relative ease.

Trimarans are generally faster than catamarans. They have a streamlined design. Their lighter weight allows them to meet higher speeds, especially when sailing upwind.

Interior Space

Catamarans generally offer more interior space and living quarters compared to trimarans. The wider beam of a catamaran allows for larger cabins, saloons, and deck areas.

Sailing Performance

Trimarans are known for their excellent upwind performance. Their narrower hulls and center hull configuration make them more efficient when sailing against the wind.

Which is better: Trimaran or Catamaran?

Catamarans are often considered better for sailing than trimarans for several reasons. They offer unparalleled stability with their twin-hull design. This makes them less prone to capsizing than trimarans.

Its stability provides a safe and comfortable sailing experience, particularly in rough seas. Additionally, catamarans excel in maneuverability. Their separate hulls allow them to make tight turns and navigate through shallow waters effortlessly.

Furthermore, catamarans tend to provide more interior space and living quarters. They offer ample room for relaxation and entertaining guests. Their wider beam also performs better in light winds, ensuring smooth sailing even when the wind weakens.

Lastly, catamarans typically have a shallower draft. This grants access to shallow anchorages and marinas, expanding their range of exploration.

The Seafari Catamaran

The Seafari catamaran is a 42′ power catamaran yacht that offers a unique and unforgettable experience on the water. It has an ultra-wide design. And it provides a spacious and comfortable environment that rivals much larger yachts.

It has essential fishing gear, coolers, grills, and supplies. So guests can enjoy a day of fishing and grilling their catch onboard. Snorkeling equipment is also available for those who want to explore the underwater world.

The yacht features below-deck bedrooms and a functioning bathroom. This ensures that guests have all the necessary amenities for a comfortable stay. Safety is a top priority, as the yacht has a liferaft and vests. The experienced and licensed Seafari captains ensure guests have a great and safe time on the water.

Whether cruising the intercoastal, hosting parties or enjoying romantic dinner cruises, the Seafari catamaran offers endless possibilities for fun and adventure.

Trimaran Vs Catamaran: Conclusion

• If you want stability and minimal work, choose a catamaran.
• If you want to improve your sailing skills while remaining safe at all times, opt for the trimaran.
• Opt for the trimaran if you want to be the fastest sailor on the water.
• If you want to host incredible events on board, opt for the catamaran.

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Looking for a great time on the water in Boca Raton Florida? Seafari Yacht Charters is number choice for yacht rentals in Boca Raton . Book our yachts for parties , exciting day trips to the Bahamas, romantic yacht dinner cruises , and much more. Come experience all South Florida has to offer with us.

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Multihull Capsize Risk Check

Waves, squalls, and inattention to trim and helm contribute to instability..

In recent years we’ve seen a surge in interest in multihulls. Thirty years ago, when my experience with cruising multihulls began, nearly all of the skippers served an apprenticeship with beach cats, learning their quirks by the seat of their pants. They hiked out on trapezes and flew head-over-heels past their pitch-pole prone Hobie 16s, until they learned the importance of keeping weight way aft on a reach and bearing off when the lee bow began to porpoise.

By contrast, the new generation of big cat buyers skipped this learning process, learning on monohulls or even choosing a big stable cat as their first boat. Heck, nobody even builds real beach cats anymore, only pumped up racing machines and rotomolded resort toys. So we’re guessing there are a few things these first-time cruising multihull sailors don’t know, even if they have sailed cruising cats before.

It is extremely hard to capsize a modern cruising cat. Either a basic disregard for seamanship or extreme weather is required. But no matter what the salesman tells you (“none of our boats have ever …”), it can happen. A strong gust with sail up or a breaking wave in a survival storm can do it. And when a multihull goes over, they don’t come back.

Trimarans tend to be more performance oriented than catamarans. In part, this is because it’s easier to design a folding trimaran, and as a result Farrier, Corsair, and Dragonfly trimarans had a disproportionate share of the market.

In spite of this and in spite of the fact that many are raced aggressively in windy conditions, capsizes are few, certainly fewer than in equivalent performance catamaran classes.  But when they do go over, they do so in different ways.

Trimarans have greater beam than catamarans, making them considerably more resistant to capsize by wind alone, whether gusts or sustained wind. They heel sooner and more than catamaran, giving more warning that they are over powered. 

Waves are a different matter. The amas are generally much finer, designed for low resistance when sailing deeply immersed to windward. As a result, trimarans are more susceptible to broach and capsize when broad reaching at high speed or when caught on the beam by a large breaking wave.

In the first case, the boat is sailing fast and overtaking waves. You surf down a nice steep one, into the backside of the next one, the ama buries up to the beam and the boat slows down. The apparent wind increases, the following wave lifts the transom, and the boat slews into a broach. If all sail is instantly eased, the boat will generally come back down, even from scary levels of heel, but not always.

In the second case a large wave breaks under the boat, pulling the leeward ama down and rolling the boat. Catamarans, on the other hand, are more likely to slide sideways when hit by a breaking wave, particularly if the keels are shallow (or raised in the case of daggerboards), because the hulls are too big to be forced under. They simply get dragged to leeward, alerting the crew that it is time to start bearing off the wind.

Another place the numbers leave us short is ama design. In the 70s and 80s, most catamarans were designed with considerable flare in the bow, like other boats of the period. This will keep the bow from burying, right? Nope. When a hull is skinny it can always be driven through a wave, and wide flare causes a rapid increase in drag once submerged, causing the boat to slow and possibly pitchpole.

Hobie Cat sailors know this well. More modern designs either eliminate or minimize this flare, making for more predictable behavior in rough conditions. A classic case is the evolution of Ian Farrier’s designs from bows that flare above the waterline to a wave-piercing shape with little flare, no deck flange, increased forward volume, and reduced rocker (see photos page 18). After more than two decades of designing multihulls, Farrier saw clear advantages of the new bow form. The F-22 is a little faster, but more importantly, it is less prone to broach or pitchpole, allowing it to be driven harder.

Beam and Stability

The stability index goes up with beam. Why isn’t more beam always better? Because as beam increases, a pitchpole off the wind becomes more likely, both under sail and under bare poles. (The optimum length-to-beam ratios is 1.7:1 – 2.2:1 for cats and 1.2:1-1.8:1 for trimarans.) Again, hull shape and buoyancy also play critical roles in averting a pitchpole, so beam alone shouldn’t be regarded as a determining factor.

Drogues and Chutes

While monohull sailors circle the globe without ever needing their drogues and sea anchors, multihulls are more likely to use them. In part, this is because strategies such as heaving to and lying a hull don’t work for multihulls. Moderate beam seas cause an uncomfortable snap-roll, and sailing or laying ahull in a multihull is poor seamanship in beam seas.

Fortunately, drogues work better with multihulls. The boats are lighter, reducing loads. They rise over the waves, like a raft. Dangerous surfing, and the risk of pitchpole and broach that comes with it, is eliminated.  There’s no deep keel to trip over to the side and the broad beam increases the lever arm, reducing yawing to a bare minimum. 

Speed-limiting drogues are often used by delivery skippers simply to ease the motion and take some work off the autopilot. By keeping her head down, a wind-only capsize becomes extremely unlikely, and rolling stops, making for an easy ride. A properly sized drogue will keep her moving at 4-6 knots, but will not allow surfing, and by extension, pitch poling. 

For more information on speed limiting drogues, see “ How Much Drag is a Drogue? ” PS , September 2016.

Capsize Case Studies

Knock wood, we’ve never capsized a cruising multihull (beach cat—plenty of times), but we have pushed them to the edge of the envelope, watched bows bury, and flown multi-ton hulls to see just how the boat liked it and how fast she would go. We’re going to tell you about these experiences and what can be learned from them, so you don’t have to try it.

First, it helps to examine a few examples of some big multihull capsizes.

Techtronics 35 catamaran, John Shuttleworth design

This dramatic pitchpole occurred in a strong breeze some 30 years ago. In order to combine both great speed and reasonable accommodation, the designer incorporated considerable flare just above the waterline, resulting in hulls that were skinny and efficient in most conditions, but wide when driven under water in steep chop.

The boat was sailing fast near Nova Scotia, regularly overtaking waves.  The bows plowed into a backside of a particularly steep wave, the submerged drag was huge, and the boat stopped on a dime. At the same time, the apparent wind went from about 15 knots into the high 20s, tripling the force on the sails and rapidly lifting the stern over the bow. Some crew were injured, but they all survived.

PDQ 32 Catamaran

On July 4, 2010, the boat’s new owners had scheduled time to deliver their new-to-them boat up the northern California coast. A strong gale was predicted, but against all advice, they left anyway. The boat turned sideways to the confused seas and a breaking wave on the beam capsized the boat. There were no injuries, and the boat was recovered with only moderate damage a few weeks later. Repaired, she is still sailing.

Another PDQ 32 was capsized in the Virgin Islands when a solo sailor went below to tend to something and sailed out of the lee of the island and into a reinforced trade wind.

Sustaining speed with wider tacking angles will help overcome leeway.

Cruising cats can’t go to windward. That’s the rumor, and there’s a kernel of truth to it. Most lack deep keels or dagger boards and ex-charter cats are tragically under canvassed for lighter wind areas, a nod to near universal lack of multihull experience among charter skippers. Gotta keep them safe.  But there are a few tricks that make the worst pig passable and the better cats downright weatherly. Those of you that learned your craft racing Hobies and Prindles know most of this stuff, but for the rest of you cruising cat sailors, there’s some stuff the owner’s manual leaves out.

“Tune” the Mast

Having no backstay means that the forestay cannot be kept tight unless you want to turn your boat into a banana and over stress the cap shrouds. Although the spreaders are swept back, they are designed primarily for side force with just a bit of pull on the forestay. The real forestay tension comes from mainsheet tension.

Why is it so important to keep the forestay stay tight? Leeward sag forces cloth into the luff of the genoa, making it fuller and blunting the entry into the wind. The draft moves aft, the slot is pinched, and aerodynamic drag increases. Even worse, leeway (sideslip) increases, further increasing drag and sliding you away from your destination. Sailing a cruising cat to windward is about fine tuning the lift to drag ratio, not just finding more power.

How do you avoid easing the mainsheet in strong winds? First, ease the traveler instead. To avoid pinching the slot, keep the main outhaul tight to flatten the lower portion of the main. Use a smaller jib or roll up some genoa; overlap closes the slot. Reef if need be; it is better to keep a smaller mainsail tight than to drag a loose mainsail upwind, with the resultant loose forestay and clogged slot. You will see monos with the main twisted off in a blow. Ignore them, they are not cruising cats. It is also physically much easier to play the traveler than the main sheet. Be glad you have a wide one.

Check Sheeting Angles

Very likely you do not have enough keel area to support large headsails. As a result, you don’t want the tight genoa lead angles of a deep keeled monohull. All you’ll do is sail sideways. Too loose, on the other hand, and you can’t point. In general, 7-10 degrees is discussed for monos that want to pinch up to 40 degrees true, but 14-16 degrees makes more sense for cruising cats that will sail at no less than 50 degrees true. Rig up some temporary barber haulers and experiment. Then install a permanent Barber-hauler; see “ Try a Barber Hauler for Better Sail Trim ,” Practical Sailor , September 2019.

The result will be slightly wider tacking angles, perhaps 105 degrees including leeway, but this will be faster for you. You don’t have the same hull speed limit, so let that work for you. Just don’t get tempted off onto a reach; you need to steer with the jib not far from luffing.

Watch the fore/aft lead position as well. You want the jib to twist off to match the main. Typically it should be right on the spreaders, but that depends on the spreaders. If you have aft swept shrouds, you may need to roll up a little genoa, to 110% max.

Use your Tell-Tales

On the jib there can be tell-tale ribbons all over, but on the main the only ones that count are on the leech. Keep all but the top one streaming aft. Telltales on the body of sail are confused by either mast turbulence (windward side) or pasted down by jib flow (leeward side) and won’t tell you much. But if the leach telltales suck around to leeward you are over sheeted.

Keep Your Bottom Clean

 It’s not just about speed, it’s also pointing angle. Anything that robs speed also makes you go sideways, since with less flow over the foil there will be less lift. Flow over the foils themselves will be turbulent. Nothing slows you down like a dirty bottom.

Reef Wisdom

Push hard, but reef when you need to. You will have the greatest lift vs. windage ratio when you are driving hard. That said, it’s smart to reef most cruising cats well before they lift a hull to avoid overloading the keels. If you are feathering in the lulls or allowing sails to twist off, it’s time to reef.

Don’t Pinch

Pinching (pointing to high) doesn’t work for cats. Get them moving, let the helm get a little lighter (the result of good flow over the rudder and keel), and then head up until the feeling begins to falter. How do you know when it’s right? Experiment with tacking angles (GPS not compass, because you want to include leeway in your figuring) and speed until the pair feel optimized. With a genoa and full main trimmed in well, inside tracks and modified keels, and relatively smooth water, our test PDQ can tack through 100 degrees with the boat on autopilot. Hand steering can do a little better, though it’s not actually faster to windward. If we reef or use the self-tacking jib, that might open up to 110-115 degrees, depending on wave conditions. Reefing the main works better than rolling up jib.

Boats with daggerboards or centerboards.  The comments about keeping a tight forestay and importance of a clean bottom are universal. But the reduction in leeway will allow you to point up a little higher, as high as monohulls if you want to. But if you point as high as you can, you won’t go any faster than similar monohulls, and quite probably slower. As a general rule, tacking through less than 90 degrees, even though possible, is not the best strategy. A slightly wider angle, such as 100 degrees, will give a big jump in boat speed with very little leeway.

Chris White Custom 57

In November 2016, winds had been blowing 25-30 knots in stormy conditions about 400 miles north of the Dominican Republic. The main had two reefs in, and the boat was reaching under control at moderate speed when a microburst hit, causing the boat to capsize on its beam. There were no serious injuries.

Another Chris White 57 capsized on July 31, 2010. It had been blowing 18-20 knots and the main had a single reef. The autopilot steered. The wind jumped to 62 knots in a squall and changed direction so quickly that no autopilot could be expected to correct in time.

Gemini 105mC

In 2018, the 34-foot catamaran was sailing in the Gulf of Mexico under full sail at about 6 knots in a 10-15 knot breeze. Squalls had been reported on the VHF. The crew could see a squall line, and decided to run for cover. Before they could get the sails down, the gust front hit, the wind shifted 180 degrees, and the boat quickly went over.

38-foot Roger Simpson Design

The catamaran Ramtha was hit head-on by the infamous Queen’s Birthday storm in 1994. The mainsail was blown out, and steering was lost. Lacking any control the crew was taken off the boat, and the boat was recovered basically unharmed 2 weeks later. A Catalac catamaran caught in the same storm trailed a drogue and came through unharmed. Of the eight vessels that called for help, two were multihulls. Twenty-one sailors were rescued, three aboard the monohull Quartermaster were lost at sea.

15 meter Marsaudon Ts

Hallucine capsized off Portugal on November 11 of this year. This is a high performance cat, in the same general category as the familiar Gunboat series. It was well reefed and the winds were only 16-20 knots. According to crew, it struck a submerged object, and the sudden deceleration caused the boat to capsize.

Multihulls We’ve Sailed

Clearly seamanship is a factor in all of our the previous examples. The watch needs to be vigilant and active. Keeping up any sail during squally weather can be risky. Even in the generally benign tropics, nature quickly can whip up a fury. But it is also true that design choices can impact risk of capsize. Let’s see what the numbers can tell us, and what requires a deeper look.

Stiletto Catamaran

We’ve experienced a number of capsizes both racing and while driving hard in these popular 23-foot catamarans. The combination of light displacement and full bow sections make pitchpoling unlikely, and the result is very high speed potential when broad reaching. Unfortunately, a narrow beam, light weight, and powerful rig result in a low stability factor. The potential for capsize is real when too much sail is up and apparent wind is directly on the beam. The boat can lift a hull in 12 knots true. This makes for exciting sailing when you bring your A-game, but limits the boat to coastal sailing.

Corsair F-24 MK I trimaran

Small and well canvased, these boats can capsize if driven hard (which they often are), but they are broad beamed, short-masted, and designed for windy sailing areas. F-24s are slower off wind than the Stiletto, in part because of greater weight and reduced sail area, but also because the main hull has more rocker and does not plane as well. They are faster to weather and point considerably higher than a Stiletto (90-degree tacking angle vs. 110 degrees). This is the result of greater beam, a more efficient centerboard design, and slender amas that are easily driven in displacement mode. The boat is quite forgiving if reefed.

Going purely by the numbers, this boat seems nearly identical to the F-24. In practice, they sail quite differently. The Dash uses a dagger board instead of centerboard, which is both more hydrodynamic and faster, but more vulnerable to damage if grounded at high speed.

The rotating mast adds power that is not reflected in the numbers. The bridgedeck clearance is higher above the waterline, reducing water drag from wave strikes. The wave-piercing amas create greater stability up wind and off the wind. The result is a boat that is slightly faster than the original F-24 and can be driven much harder off the wind without fear of pitchpole or broach.

Without proper testing, calculating stability yields only a rough picture.

Evaluating multihull performance based on design numbers is a bit more complicated than it is with ballasted, displacement monohulls, whose speed is generally limited by hull form. [Editor’s note: The formula for Performance Index, PI has been updated from the one that originally appeared in the February 2021 issue of Practical Sailor.

The following definitions of units apply to the adjacent table:

SA = sail area in square feet

D (displacement) = weight in pounds

LWL = length of waterline in feet

HCOE = height of sail center of effort above the waterline in feet

B = beam in feet

BCL = beam at the centerline of the hulls in feet.

Since a multihull pivots around the centerline beam, the overall beam is off the point and is not used in formulas. Calculate by subtracting the individual hull beam from the overall beam.

SD ratio = SA/(D/64)^0.66

This ratio gives a measure of relative speed potential on flat water for monohulls, but it doesn’t really work for multihulls.

Bruce number = (SA)^0.5/(D)^0.333

Basically this is the SD ratio for multihulls, it gives a better fit.

Performance index = (SA/HCOE)^0.5 x (D/1000)^0.166

By including the height of the COE and displacement, this ratio reflects the ability of the boat to use that power to sail fast, but it understates the importance of stability to the cruiser.

Stability factor = 9.8*((0.5*BCL*D)/(SA*HCOE))^0.5

This approximates the wind strength in knots required to lift a hull and includes a 40% gust factor. In the adjacent data sheet, we compare the formula’s predicted stability to observed behavior. Based on our experience on the boats represented, the results are roughly accurate.

Ama buoyancy = expressed as a % of total displacement.

Look for ama buoyancy greater than 150% of displacement, and 200 is better.  Some early trimaran designs had less than 100 percent buoyancy and would capsize well before flying the center hull. They exhibited high submerged drag when pressed hard and were prone to capsize in breaking waves.

Modern tris have ama buoyancy between 150 and 200 percent of displacement and can fly the center hull, though even racing boats try to keep the center hull still touching. In addition, as a trimaran heels, the downward pressure of wind on the sail increases, increasing the risk of capsize. The initial heel on a trimaran is more than it is on catamarans, and all of that downward force pushes the ama even deeper in the water. Thus, like monohulls, it usually makes sense to keep heel moderate.

These numbers can only be used to predict the rough characteristics of a boat and must be supplemented by experience.

This is the first real cruising multihull in our lineup. A few have capsized. One was the result of the skipper pushing too hard in very gusty conditions with no one on watch. The other occurred when a crew unfamiliar with the boat ignored local wisdom and set sail into near gale conditions.

Although the speed potential of the PDQ 32 and the F-24 are very similar, and the stability index is not very different, the feel in rough conditions is more stable, the result of much greater weight and fuller hull sections.

Like most cruising cats, the PDQs hulls are relatively full in order to provide accommodation space, and as a result, driving them under is difficult. The increased weight slows the motion and damps the impact of gusts. Yes, you can fly a hull in about 25 knots apparent wind (we proved this during testing on flat water with steady winds), and she’ll go 8-9 knots to weather doing it, but this is not something you should ever do with a cruising cat.

Stability by the Numbers

The “stability factor” in the table above (row 14) is based on flatwater conditions, and ignores two additional factors. Unlike monohulls, the wind will press on the underside of the bridgedeck of a multihull once it passes about 25 degrees of heel, pushing it up and over. This can happen quite suddenly when the boat flies off a wave and the underside is suddenly exposed to wind blowing up the slope of the wave. A breaking wave also adds rotational momentum, pitching the windward hull upwards.

Multihulls by the Numbers

Autopilot is a common thread in many capsizes. The gust “came out of no place…” No it didn’t. A beach cat sailor never trusts gusty winds. The autopilot should be disengaged windspeeds and a constant sheet watch is mandatory when gusts reach 30-40 percent of those required to fly a hull, and even sooner if there are tall clouds in the neighborhood. Reef early if a helm watch is too much trouble.

“But surely the sails will blow first, before the boat can capsize?” That would be an expensive lesson, but more to the point, history tells us that well-built sails won’t blow.

“Surely the rig will fail before I can lift a hull?” Again, that could only be the result of appallingly poor design, since a rig that weak will not last offshore and could not be depended on in a storm. Furthermore, good seamanship requires that you be able to put the full power of the rig to work if beating off a lee shore becomes necessary.

Keeping both hulls in the water is up to you. Fortunately, under bare poles and on relatively flat water even smaller cruising cats can take 70 knots on the beam without lifting … but we don’t set out to test that theory, because once it blows for a while over even 40 knots, the real risk is waves.

Everything critical to safety in a blow we learned on beach cats. Like riding a bike, or—better yet—riding a bike off-road, there are lessons learned the hard way, and those lessons stay learned. If you’ve been launched into a pitchpole a few times, the feeling you get just before things go wrong becomes ingrained.

Perhaps you are of a mature age and believe you monohull skills are more than enough to see you through. If you never sail aggressively or get caught in serious weather, you’re probably right.

However, if there’s a cruising cat in your future, a season spent dialing in a beach cat will be time well spent. Certainly, such experience should be a prerequisite for anyone buying a performance multihull. The statement might be a little pointed, but it just makes sense.

Capsize by Wind Alone

Capsizing by wind alone is uncommon on cruising multihulls. Occasionally a performance boat will go over in squally weather. The crew could easily have reefed down or gone to bare poles, but they clung to the idea that they are a sail boat, and a big cat feels so stable under sail—right up until a hull lifts.

Because a multihull cannot risk a knockdown (since that is a capsize), if a squall line is tall and dark, the smart multihull sailors drops all sail. Yes, you could feather up wind, but if the wind shifts suddenly, as gusts often do, the boat may not turn fast enough. Off the wind, few multihulls that can take a violent microburst and not risk a pitchpole. When a squall threatens, why risk a torn sail for a few moments of fast sailing?

You can’t go by angle of heel alone because of wave action. Cat instability begins with the position of the windward hull. Is it flying off waves?

A trimaran’s telltale is submersion of leeward ama. Is the leeward ama more than 30-40 percent under water? The maximum righting angles is a 12-15 degrees for cats and 25-30 degrees for trimarans, but that is on flat water. Once the weather is up, observation of motion becomes far more important. Is the boat falling into a deep trough, or is at about to launch off a steep wave and fly?

Just as monohulls can surprise a new sailor by rounding up and broaching in a breeze, multihulls have a few odd habits that only present themselves just before things go wrong. Excuse the repetition, but the best way to learn to instinctively recognize these signs is by sailing small multihulls.

Sailing Windward

Because of the great beam, instead of developing weather helm as they begin to fly a hull, multihulls can suddenly develop lee helm, causing the boat to bear away and power up at the worst possible moment. This is because the center of drag moves to the lee hull, while the center of drive remains in the center, causing the boat to bear away.

If the boat is a trimaran, with only a center rudder, this rounding up occurs just as steering goes away. This  video of a MOD 70 capsize shows how subtle the early warning signs can be ( www.youtube.com/watch?v=CI2iIY61Lc8 ).

Sailing Downwind

Off the wind, the effect can be the reverse. The lee hull begins to bury, and you decide it is time to bear off, but the submerged lee bow acts like a forward rudder. It moves the center of effort far forward and prevents any turn to leeward.  Nearly all trimarans will do this, because the amas are so fine. The solution is to bear away early, before the ama buries­—or better yet, to reef.

Conclusions

We’re not trying to scare you off multi-hulls. Far from it. As you can probably tell, I am truly addicted. Modern designs have well-established reputation seaworthiness.

But multihull seaworthiness and seamanship are different from monohulls, and some of those differences are only apparent when you press the boat very hard, harder than will ever experience in normal weather and outside of hard racing. These subtle differences have caught experienced sailors by surprise, especially if their prior experience involved only monohulls or cruising multihulls that were never pressed to the limit.

Although the numbers only tell part of the story, pay attention to a boat’s stability index. You really don’t want an offshore cruising boat that needs to be reefed below 22-25 knots apparent. Faster boats can be enjoyable, but they require earlier reefing and a more active sailing style.

When squalls threaten or the waves get big, take the appropriate actions and take them early, understanding that things happen faster. And don’t forget: knockdowns are not recoverable. It is satisfying to have a boat that has a liferaft-like stability, as long as you understand how to use it.

Technical Editor Drew Frye is the author of “Rigging Modern Anchors.” He blogs at www.blogspot/sail-delmarva.com

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22 comments.

It’s interesting to read the report of the Multihull Symposium (Toronto, 1976) regarding the issues of multihull capsize in the formative years of commercial multihull design. There were so many theories based around hull shape, wing shape, submersible or non submersibe floats, sail area and maximum load carrying rules. My father, Nobby Clarke, of the very successful UK firm Cox Marine, fought many a battle in the early Sixties with the yachting establishment regarding the safety of trimarans, and I am glad that in this modern world technolgy answers the questions rather than the surmises of some establishment yachting magazines of the time.

Thank You Mr.Nicholson and Thank You to Practical Sailor for this great read superbly shared by Mr.Nicholson God bless you and our great Sailing Family.

Great read! Multi hulls are great party vessels which is why companies like Moorings and Sunsail have larger and larger numbers in their fleets. More and more multihulls are joining the offshore sailing fleets. Dismasting and capsizes do happen. Compared to mono hulls I know of no comparative statistics but off shore and bluewater, give me a mono hull. That is probably because I took one around with zero stability issues and only minor rig few issues. Slowly though; ten years.

Great read! Multi hulls are great party vessels which is why companies like Moorings and Sunsail have larger and larger numbers in their fleets. More and more multihulls are joining the offshore sailing fleets. Dismasting and capsizes do happen. Compared to mono hulls I know of no comparative statistics but off shore and bluewater, give me a mono hull. That is probably because I took one around with zero stability issues and only minor rig issues. Slowly though; ten years.

What’s an ama? Those who are new to sailing or even veteran sailors who have never been exposed to a lot of the terms simply get lost in an article with too many of those terms. I would suggest putting definitions in parentheses after an unfamiliar term to promote better understanding.

Vaka is the central, main hull, in a trimaran.

Ama is the “pontoon” hull at the end of the aka, or “crossbeam”, on each side of a trimaran.

I’m a geek, and therefore live in a dang *ocean* of the Jargonian & Acronese languages, and agree with you:

presuming 100% of audience is understanding each Jargonian term, and each Acronese term, is pushing credulity…

( and how in the hell “composition” means completely different things in object-oriented languages as compared with Haskell?? Bah. : )

As I understand it: Cats have an advantage in big beam seas because they will straddle a steep wave whereas a Tri can have its main hull on the wave crest with the windward ama’s bottom very high off the water and acting as another sail. Also, rig loads on a mono hull are calculated to be 2.5-3x the righting moment at a 45 deg heal; the reason being at 45 degrees the boat will still be making headway and feeling the dynamic loads in the seaway but beyond 45 degrees is a knockdown condition without seaway shock loads. A multihull rig on the other-hand can experience very high dynamic shock loads that are too short in duration to raise a hull.

Though I agree with much of the article content, the statement: “… this is because strategies such as heaving to and lying a hull don’t work for multihulls.” does not ring true in my experience. I have sailed about 70,000nm on cruising catamarans, a Canadian built Manta 38 (1992, 39ft x 21ft) with fixed keels and my present boat, a Walter Greene Evenkeel 38 (1997, 38ft x 19ft 6″) with daggerboards. I came from a monohull background, having circumnavigated the world and other international sailing (60,000nm) on a mono before purchasing the Manta cat. I owned that catamaran for 16 years and full time cruised for seven of those years, including crossing the Arctic Circle north of Iceland and rounding Cape Horn. I usually keep sailing until the wind is over 40knots, then the first tactic is to heave-to, and have lain hove-to for up to three days with the boat lying comfortably, pointing at about 50 to 60degrees from the wind and fore-reaching and side-slipping at about 1.5 to 2knots. Usually once hove-to I wait until the wind has reduced to 20knots or less before getting underway again. Lying ahull also works, though I have only used that in high winds without big breaking waves, as in the South Atlantic in the lee of South America with strong westerlies. I have lain to a parachute sea anchor and it is very comfortable, though lots of work handling all that gear and retrieving it and was glad to have deployed it when I did. I heave-to first, then deploy the sea anchor from the windward bow while in the hove-to position. The daggerboard cat will also heave-to well, though takes some adjusting of the boards to get her to lay just right, though I have not experience being at sea on this boat in as high of winds as with the Manta (over 60 knots). Catamaran bows have lots of windage and have little depth of hull forward. Thus you need mostly mainsail and little jib to keep her pointing into the wind. I aim for the wind to blow diagonally across the boat, with a line from the lee transom to the windward bow pointing into the wind as an optimum angle. As per taking the boat off autopilot when the wind gets near 20 knots is just not practical. The longest passage I have made on my catamarans has been from Fortaleza, Brazil, to Bermuda, nearly 3,000nm and across the squall prone doldrums and horse latitudes, taking 20 days. The autopilot steered the whole distance. I have never lifted a hull nor felt the boat was out of control despite having sailed in some of the most dangerous waters of the world.

I believe that your Techtronics 35 should be Tektron 35 (Shuttleworth) and as far as I know the capsize that occurred off Nova Scotia was, in fact, a Tektron 50 (Neptune’s Car I believe) sailed by the Canadian builder Eugene Tekatch and was reported as being off PEI. This capsize was well documented under a thread in “Steamradio” that I can no longer find. It appears that Steamradio is now, unfortunately, no longer operating. The report of the capsize was along the lines of the boat being sailed off wind with all sail in a gale. I think Shuttleworth indicated that they would have been doing about 30 knots. They then hit standing waves off PEI, the boat came to a standstill and with the change in apparent wind to the beam, over they went. Reading between the lines, Shuttleworth was pretty unhappy that one of his designs had been capsized in this manner, unhappier yet that some of the findings of I believe an american committee/ board were that the design was somehow at fault. Given Shuttleworth’s rep it seems unlikely. As I say these are recollections only.

Shortly afterwards Neptune’s Car was up for sale for a steal price.

I think Jim Brown (Trimaran Jim) when speaking of the Tektron 50 referred to it as weighing less than similarly sized blocks of Styrofoam. Admittedly, blocks of solid foam weigh more than one might imagine, but still a vivid point. Though Tektron 50 was light, we have far more options to build lighter boats today, than in the past.

Good that Practical Sailor is looking at this issue and I agree with much of it, so thanks PS for that. Also fun to see Nobby Clark’s son chip in …. I met Nobby at the ’76 World Symposium in Toronto, when I was just starting to get interested in Trimarans. I have since owned 4 and as a naval architect, builder and sailor, now specialize in their design and ‘all things related’, with a quasi-encyclopedic website at: http://www.smalltridesign.com . So as a trimaran guru, I’d like to add a few things here. In my experience (now 45 years with multis) there is really too much difference between catamarans and trimarans to compare them on the basis of the same formulas. For example, lifting a hull on a cat brings about a major reduction in reserve stability ….. lifting an ama on a trimaran, certainly does not. Using 30-40% immersion of an ama is hardly a guide to limit or prevent a capsize on a trimaran as that’s not even close to normal operating immersion . I would recommend a reduction of ama bow freeboard to about 1-2% of the boat length (depending on a few size factors) is a better guide as the ‘time to really ease up’. This visual indicator is great on my boats but is very hard to judge on hulls with reverse bows where there is no deck up forward. For a number of reasons, I am against this shape but as I’ve already made my case on line about this, I’ll not repeat it here. Over 80% of the capsizes we see on line, show that mainsails were never released .. and that includes the capsize of the MOD70 in the YouTube referenced in the PS article. As several trimaran owners I deal with have also capsized or near-capsized their boats (particularly those between 22 and 40ft that ‘feel’ more stable than they really are, I am developing a few models of EMRs to help solve their issue, (EMR=Emergency Mainsheet Release) and these will be operated wirelessly by punching a large button under the skippers vest, as I am not in favor of any fully automatic release. This HAS to be a skippers decision in my opinion for numerous reasons. The first two units of this EMR dubbed ‘Thump’R, will be installed this Spring … one in Europe and the other in Australia, but one day, perhaps Practical Sailor will get to see and test one for you 😉 In a few words, my advice to all multihull sailors is to be very aware of the way your stability works on your specific boat and sail accordingly. We learn this instinctively with small beach boats, but is harder to ‘sense’ as boats get heavier and larger. I have sailed cats from a 60ft Greene cat to a 12ft trimaran and although some basics apply they are of course very different. But you still need to ‘learn the early signs’ of your boat, as these must be your guide. IMHO a good multihull design will be fairly light and easily driven which means that it will still sail well with less sail. This means that the use of a storm mainsail in potentially high wind can add much reserve stability and safety to your voyage. To give an example from my small W17 design that sets a rotating wingmast, the boats top speed to date is 15kts with 200 sqft, but with the storm mainsail and a partly-furled jib I can get the area down under 100sqft without losing rig efficiency. In fact, the tall narrow storm main with a 5.5:1 aspect ratio is now even MORE efficient as the wingmast is now doing a higher percentage of the work. In 25-30t storm conditions, I have now sailed 8kts upwind and 14.4kts down, and feel very dry and comfortable doing so … even at 80+. So get the right sails, and change down to small more efficient ones when it pipes up. A multihull storm sail should look nothing like a mono’s trysail … with our narrow hulls, we are sailing in a very different way. Happy sailing Mike

In the old days, low displacement, short and narrowly spaced amas were the design of choice. One was supposed to back off when they started to submerge. It was a visual indicator. Modern amas are huge. If a 24 foot tri like the Tremolino could be designed to use Hobie 16 hulls in the 70s, today it would carry Tornado hulls. The slippery shape of designs catches the eye, and their supposed less grabby when submerged decks, but these amas also carry 1.5-2x main hull displacement. The chance of burying them is significantly reduced.

The original intent of these slippery ama designs was to shake off wind. Though low drag shapes for reducing pitch pole risk are a consideration, it should be balanced against maintaining ama deck walkability. This is important in allowing one to service the boat or rig drogues or anchors, not to mention to position live ballast. I am thinking here of the smaller club and light crusing tris. You aren’t going to be able to do a lot of these things on monster luxury boats that are a different scale entirely. But they mater on the kinds of boat most people are likely to own.

Poring over tri design books, one will notice that the silhouette of, say, a 40 foot tri, and the smaller 20 foot design are very similar This yields a doubling of the power to weight ratio on the smaller boat. This difference can even be greater as the smaller boats are often nothing more than empty shells, yet may carry higher performance rig features like rotating masts. Smaller tris are often handicapped by the requirements of being folded for trailering which both limits beam and ama displacement, though it may tend to increase weight. On top of that, mainsail efficiency is much higher, these days, with squared shapes, and less yielding frabrics. And, of course, much larger sail plans. All the better, just so long as people realize what they have by the tail.

Excellent article…thank you!!!!!!!!!

Good article. One thing that concerns me about modern cruising cat is how far above water level the boom is. I first noticed this looking at Catana 47’s for hire in New Caledonia and recently saw large Leopards 48 & 50 footers visiting Fremantle Sailing Club, here in Australia, and in all cases the boom seems to be at least 20 feet (6 metres) above the water. This seems to greatly increase the heeling moment and reduce the amount of wind required to capsize the vessel. Mind you at 20+ tons, the weight of the Leopards probably makes them a bit more resistant to capsize. But why does the rig need to be so far off the water?

Notice to Moderator After having read this article a couple or days back, I emailed naval architect mike waters, author of the specialist website SmallTriDesign to read the article and perhaps comment. Nearly a day ago, he emailed me back to say that he had, yet there’s been nothing posted from him and now I see a post with todays date. With his extensive knowledge and experience I would have thought his insight to be valuable to your readers and I was certainly looking forward to seeing his input. What happened?

Yes, PS .. what’s cookin ? Thought readers would be interested to know that capsize control help maybe on the way 😉

Yes PS, what’s cookin’ ? Thought your readers would like to know that some anti-capsize help maybe on the way 😉

Great article! I’ve read it twice so far. Recently in Tampa Bay I sailed my Dragonfly 28 in 25 knots breeze and found that speed was increased (drag reduced?) after I put in one reef in the main. I think I should have reefed the Genoa first?

Absolutely Tim. Slim hulls, as for most trimarans and the finer, lighter catamarans will often sail more efficiently with less sail .., especially if with a rotating mast, and you can indeed get proportionally better performance. The boat sails more upright for one thing, giving more sail drive from improved lift/drag and less hull resistance .. and its certainly safer and more comfortable and can also be drier, as an upright boat tends to keep wavetops passing underneath more effectively. Even my W17 design has been shown to achieve over 90% of its top speed with only 1/2 the sail area, by switching to a more efficient, high-aspect ratio ‘storm mainsail’ set behind its rotating wingmast …, a far cry from a monohulls storm trysail in terms of upwind efficiency. Yes, wind speed was higher, but the boat sailed far easier and its definitely something that slim hulled multihulls should explore more, as they will then also be less likely to capsize. More here if interested http://www.smalltridesign.com

Darrell, is there some reason for blocking replies that hold opinions contrary to those of PS ? I am still hoping to read the expertise of those who actually study design and sail multihulls. The written target of PS is to accurately present facts and that implies the input of experts. Over the last 10 years, I have come to appreciate a few experts in the field of multihulls and right now, I see at least one of them is not being given a voice here. Your article made a lot of fine points but there are some issues needing to be addressed if PS it to remain a trusted source for accurate information. First, I have been told by a reliable source, you need to separate trimarans from catamarans and use different criteria to compare their stability as they do not respond the same and neither can you judge their reserve stability in the same way. I would also like to know what NA Mike Waters was hinting at when he said “capsize control help may be on the way” .. would you know anything about that? If not, then please invite or allow him space or the promise of PS fact-finding accuracy is heading down the drain for me. thanks

As a new subscriber to PS, it is a little disquieting to see no response to the two comments above by Tom Hampton.

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Trimaran vs catamaran: Which one to go for

Nov 27, 2020

less than a min

There is a lot of commotion in the marine world when it comes to the discussion of trimaran vs catamaran. Both vessels are part of the multihull category . A catamaran is a yacht with two hulls while a trimaran has three hulls.

First of all, it is important to note that both trimarans and catamarans are more popular than monohulls lately as they are easier to control. In addition, monohulls can capsize more easily in difficult weather conditions, and sometimes, they even have space limitations. Moreover, speed is a big advantage of trimarans and catamarans. Typically, these multihulls are 25-30% faster than a monohull of the same size.

Trimarans vs catamarans: which one is better

Both trimarans and catamarans have their advantages and disadvantages which means that picking one over the other is not only hard but probably impossible. The choice is based not solely on their properties but also on weather conditions, destination route, and most importantly, personal taste.

Let’s have a look at both yachts in more detail.

Catamarans are very interesting boats. They are also known as cats, an abbreviation of their name but also a tribute to their versatility. These boats are fun to sail and also provide a good level of comfort. Their size varies between a few cabins that can accommodate 2 people, to a large group of 20. While many catamarans are affordable and family-friendly, some of them also display extra luxury and can sail to the most beautiful and expensive destinations around the Mediterranean and the Caribbean. Last but not least, catamarans are very good yachts when it comes to stability, but they are mainly designed to sail in shallow waters, lagoons, or calm sea gulfs.

Trimarans have three hulls – the main one, and two overhangs. As a result of this geometry, trimarans are unsinkable. They do not capsize even in the worst of storms, and even in the rare case that they flip over, trimarans manage to stay afloat. The big disadvantage a trimaran has is that it combines the comfort and sailing capacity of a monohull boat with the security to stay afloat that a multihull provides. In addition, trimarans are some of the fastest boats out there. They can be used as chartered vessels as well as racing boats.

Trimaran vs. catamaran: which one to choose

A catamaran is a better choice if you are looking for minimal work on deck . Also, catamarans are perfect for holding events and parties on board while still maintaining their stability on the water. Here is a list of the best catamarans under 50 feet .

If you are looking for something more challenging where to practice your sailing skills, then a trimaran is a more appropriate boat for you. In addition, if you are a speed junkie, look out for the fastest trimaran boats and pick the one that best suits your needs.

While making a choice between a trimaran vs a catamaran seems easy on paper, it is harder when you are in front of the fact, or better yet, in front of the boat. To make a more informed decision, compare any boat you are looking at TheBoatDB . Find out all their features and get a better picture of what life would be like if you purchased that vessel.

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Can a Catamaran Capsize? The Surprising Answer

Capsizing often happens with small boats like canoes, kayaks, and sailboats. But even for bigger boats like catamarans, which have an established reputation for stability and safety, it's still normal to wonder if they can capsize too. To give you peace of mind and prepare you for the worst, let's answer that question in this article.

A catamaran can capsize under extreme conditions, just like any other boat. Even the most stable catamaran can capsize if it's hit by a large wave, caught in a sudden gust of wind, or if the rotational force has overcome the stability of the boat. However, it's not something that happens frequently.

It can be a scary experience if a catamaran capsized, but you have to stay calm and know that most modern catamarans are designed to self-right. This means that they can turn themselves back over after capsizing. Let's continue reading to know what else can we do to recover from a catamaran capsize.

• A catamaran's stability is attributed to its center of gravity, its freeboard, and its pendulum-like behavior. However, despite its stability and speed, a catamaran can still capsize due to strong winds and capsizing waves.
• There are factors that can contribute to the likelihood of a capsize happening, such as wind speed, wave height, weather conditions, breaking waves, and the overall sailing conditions.
• The best thing to do to quickly recover from a capsize is to stay calm and position the boat to make it self-right quickly.

On this page:

A catamaran can capsize despite its stability, factors influencing catamaran capsizing, safety measures to prevent capsizing, recovering from a capsized catamaran.

A catamaran can capsize. However, it's not very common, and most catamarans are designed to be stable and safe in a variety of conditions.

Despite their stability and speed, catamarans can still capsize under certain conditions. Strong winds, large waves, and imbalance can all cause a catamaran to capsize. When a catamaran is caught in a gust of wind, the increased wind pressure on one side of the catamaran can cause it to lean to one side, which can lead to a capsize if not corrected.

Any boat can technically capsize , but there are specific factors that can contribute to a catamaran capsizing. One of the main reasons for catamaran capsizing is the effect of rotational forces. When these forces overcome the stability of the boat, it can lead to capsizing.

A catamaran is a type of multihull boat that has two parallel hulls connected by a deck or bridge. They are well known for their stability and speed, making them a popular choice for sailors and boaters.

One of the key advantages of their twin hulls is that it gives them a larger base and makes them less likely to tip over . It also helps to distribute the weight of the boat more evenly, providing greater stability. This is especially helpful in rough seas , where the catamaran's stability can help keep you safe and comfortable. Below are factors that contribute to the stability of catamarans:

Their center of gravity makes them stable

In a catamaran, the center of gravity is typically lower than in a monohull, which helps reduce the likelihood of capsizing. This is because the lower the center of gravity, the more stable the boat will be.

The freeboard also adds up to their stability

Their freeboard of a catamaran is typically lower than a monohull's, which helps to reduce the windage and the chances of the boat being pushed over by strong winds.

Their pendulum-like behavior helps them to be stabilized

When they encounter waves, the two hulls move independently of each other, which helps to reduce the rolling motion of the boat. This is because the weight of the boat is distributed between the two hulls, which act like pendulums, swinging in opposite directions to counterbalance the motion of the waves.

Aside from stability, another advantage of a catamaran is its speed. Because they have two hulls, they create less drag than a single hull and can move through the water more quickly and efficiently. This can be especially useful if you're trying to get somewhere quickly or if you're racing.

The height of the wave can affect the chance of capsizing

Wave height is a significant factor when it comes to catamaran capsizing. The higher the waves, the greater the risk of capsizing. This is because the waves can exert a significant amount of force on the boat, causing it to tip over.

Wave capsize occurs when a boat overtakes a wave and sinks its bow into the next one, causing it to capsize. However, this is also not very common and can usually be avoided by keeping an eye on the waves and adjusting your speed and course accordingly.

Wind speed is another important factor to consider

The stronger the wind, the more likely it is that a catamaran will capsize. The wind can create a lot of pressure on the sails, which can cause the boat to lean to one side and potentially capsize. To know more about the ideal wind speed in sailing, read this article.

Weather conditions can also play a role in catamaran capsizing

If there is a storm or other severe weather conditions, the risk of capsizing is much higher. Perhaps consider checking the weather forecast before setting out on a catamaran to ensure that conditions are safe. You may also try reading this article on the possible danger of sailing through thunderstorms.

Breaking waves can cause a catamaran to capsize

When waves break, they release a significant amount of energy, which can cause the boat to capsize. Try to keep an eye out for breaking waves and avoid them if possible.

The overall sailing condition can increase the likelihood of capsizing

You may need to be aware of the conditions and take appropriate precautions to ensure that you stay safe while on the water.

1. Ensure proper weight distribution

To prevent capsizing, you could check if the weight on your catamaran is evenly distributed, with heavier items stored low and towards the center of the boat. Try to avoid overloading your catamaran with too much weight.

2. Learn the right way of reefing

Reefing is the process of reducing the size of your sails to adjust to changing wind conditions. When the wind starts to pick up, you will need to reef your sails to prevent your catamaran from heeling over too much. You must learn how to reef your sails properly before you set out on your journey.

3. Know how to properly anchor and use the right anchor

An anchor can help keep your catamaran in place and prevent it from drifting in strong currents or winds. You need to know how to properly anchor your catamaran and always use an anchor that is appropriate for the size of your boat. Learn different anchoring techniques in tough conditions through this article: Boat Anchoring Techniques Explained (Illustrated Guide)

4. Utilize your catamaran's engine

Your engine can be a valuable tool for preventing capsizing. If you find yourself in a dangerous situation, such as strong winds or currents, you can use your engine to help keep your catamaran stable and prevent it from capsizing.

5. Use your boat tools to prevent it from capsizing

Keels, daggerboards, and centerboards all help stabilize your catamaran and prevent capsizing. You may need to check if these are properly installed and maintained.

6. Use the drogue to slow down the boat

A drogue is a device that can help slow down your catamaran and prevent it from capsizing in heavy seas. You can check if you have a drogue on board and learn how to properly use it in case you need to.

7. Make sure to have safety equipment onboard

Always make sure you have the proper safety equipment on board, including life jackets, flares, and a first aid kit. Everyone on board must also know where the safety equipment is located and how to use it.

8. Use an autopilot

Autopilot can help keep your catamaran stable and prevent it from heeling over too much. Consider learning how to properly use your autopilot before you set out on your journey.

Capsizing a catamaran can be a scary experience, but with proper preparation and practice, you can easily handle it. When the boat flips upside down, all the loose gear in the boat floats away (or sinks), and you are left with a capsized boat. Here are some steps that can help you recover from a catamaran capsize:

The first thing to do when your catamaran capsizes is to remain calm. Take a deep breath and assess the situation. Check if everyone on board is safe and accounted for.

Position the catamaran to self-right

Catamarans are designed to self-right, which means that they can turn themselves back over after capsizing. To self-right, the boat needs to be positioned in a certain way, usually with the mast pointing downwind.

Help the catamaran to self-right using the righting lines

If your catamaran doesn't self-right, you can help it by using the righting lines. These lines are attached to the bottom of the hulls, and they can be used to pull the boat back upright.

The buoyancy of the catamaran can help you recover

Catamarans are designed to be buoyant , which means that they can float even when they are upside down. This makes it easier to recover from a capsize.

Be prepared

The best way to prepare for a capsize is to practice recovering from one. Set aside some time to practice capsizing your catamaran in a controlled environment, like a calm lake. This will help you build confidence and prepare you for the real thing.

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Trimaran VS Catamaran – Which Boat Is Best?

If you’re planning to buy or charter a multihull boat, you might be wondering which one is better: trimaran or catamaran. Both have their pros and cons, and the decision ultimately depends on your needs and preferences. In this article, I’ll explain the differences between these two types of vessels to help you make the best choice for your needs.

Post updated: 10 November 2023

Table of Contents

Differences Between Trimarans and Catamarans?

If you’re in the market for a new vessel or plan a family vacation on the water, you might wonder what the differences are between a catamaran and a trimaran. 

Let’s see what they are:

A catamaran is a multihull vessel with two or twin hulls that are parallel to each other and fixed to a wide beam.

This design offers stability and speed, making it a popular choice for cruising long distances comfortably and even racing.

They also provide more interior space than trimarans, allowing for larger cabins and more storage.

When it comes to sailing performance, catamarans are known for their speed and agility.

Their twin hulls allow them to easily glide over the water, making them popular among boaters.

Cats are stable, fast, spacious, and super comfortable and are more stable at anchor than trimarans. However, catamarans tend to perform better in downwind conditions than in upwind conditions.

A trimaran is a multihull vessel that has three hulls. The two smaller outrigger hulls are attached to the center hull, which is larger and used for most of the boat’s functionality. 

This design offers even more stability than a catamaran, making it a great choice for those who want to sail in rough waters safely.

The three-hulled design makes them super stable, and as mentioned above, they can easily handle rough waters. They also have a smaller turning radius, making them easier to maneuver in tight spaces.

Another important thing to know about Trimarans is that they provide a decent degree of livability, but they fall short of catamarans in two regards. First, they heel more than cats, making it difficult to do things like cooking on board. Second, they support much less load than catamarans.

Pros and Cons of Catamarans and Trimarans

Before making a decision whether to sail a catamaran or a trimaran, there are pros and cons you must consider. Let’s see what there are:

• Stability: Catamarans have two hulls, which makes them extremely stable. This means that you are less likely to experience seasickness or feel the boat rocking in rough waters.
• Space: Catamarans have a lot of space both inside and outside the boat. This makes them great for large groups or families who want to spend time together without feeling cramped.
• Speed: While not as fast as trimarans, catamarans are still faster than monohulls . They perform better in downwind conditions than trimarans and are great for long-distance cruising in calm waters.
• Shallow Draft: Catamarans have a shallow draft, which allows them to enter shallow waters and anchor closer to shore.
• Cost: Depending on how well the Catamaran is equipped, it can be more expensive than trimarans. Not always, though.
• Harbor Cost: As catamarans have a very large beam, this means that a berth at the marina will be higher.
• Navigation: Catamarans tend to struggle sailing close to the wind .
• Speed:  Trimarans are known for being faster than cats and single-hull boats. They can easily reach high speeds and are great for racing or long-distance cruising.
• Stability:  Trimarans are more stable than catamarans due to their three hulls. 
• Space:  Trimarans are wide, but the interior is less spacious than catamarans.
• Safety:  Provide exceptional buoyancy. If a trimaran capsizes, there is almost no chance it will sink.
• Navigation: Trimarans can sail in any weather condition and perform much better upwind than cats.
• Berthing:  Trimarans are more difficult to maneuver in harbors, making finding a berth in crowded marinas more challenging.
• Maneuverability:  Trimarans require more ability from sailors to beach without difficulty than catamarans.
• Loading:  Trimarans struggle to carry as much weight as catamarans.
• Sailing: Trimarans require more effort and work on the deck.

Design and Structure

When it comes to design and structure, there are significant differences between trimarans and catamarans. Below, I’ll walk you through these two multi-hull vessels’ geometry, hydrodynamics, weight, and materials.

Geometry and Hydrodynamics

One of the most significant differences between trimarans and catamarans is their geometry. A trimaran has a central hull with two outriggers connected to a large beam, while a catamaran has two parallel hulls connected by a central platform.

This twin-hull design gives catamarans a unique sense of balance and stability. On the other hand, trimarans offer superior stability and adaptability in various water conditions thanks to their three-hulled design.

The central hull of a trimaran is typically longer and narrower than the hulls of a catamaran, which leads to better hydrodynamic performance.

Both trimarans and catamarans have different hydrodynamic resistance characteristics.

For instance, trimarans have less wetted surface area, which means they experience less drag as they move through the water. This feature makes trimarans faster than catamarans in rough weather conditions and high winds.

Performance and Speed

When it comes to performance and speed, there is a clear winner between trimarans and catamarans . Trimarans are known for their speed and are often faster than catamarans of the same size and weight. This is because of their unique design, which has speed and safety qualities that provide significant advantages over catamarans.

Trimarans have less hydrodynamic resistance than catamarans due to their narrower central hull, which allows them to slice through the water more efficiently in rough seas.

While catamarans are also fast, they often fall short of trimarans in terms of speed and performance. But that’s not always true in downwind conditions because cats are light, and their sails are positioned equivalent to the wind, making them faster than tris in downwind conditions.

Heeling and Capsizing

One of the biggest concerns when it comes to stability is heeling and capsizing. Heeling means the boat leans from one side to one side, while capsizing is when the boat flips over completely.

Both trimarans and catamarans heel, but trimarans provide greater stability and are less likely to capsize due to their three hulls. However, this doesn’t mean a trimaran can’t capsize.

In rough conditions, if a wave gets higher than half the size of the beam, the boat can flip over, but because trimarans have exceptional buoyancy, they float on the surface of the water and can serve as a rescue platform, but they won’t sink!

Comfort and Space

One important factor to consider when choosing between a cat and a tri is comfort and space. So, let’s look at these two types of boat’ accommodation: storage, cockpit, and living quarters.

Accommodation and Storage

One of the main advantages of catamarans over trimarans is the amount of space they offer. Catamarans typically have larger cabins and more storage space than trimarans. This makes them a great choice for longer trips, as you’ll have plenty of room to store all your gear and personal belongings.

Trimarans, on the other hand, have smaller cabins and less storage space. This can make the passengers feel a bit cramped, especially on longer trips. 

However, some trimarans do offer creative storage solutions, such as under-bunk storage compartments or overhead storage racks. Note that the latest models of trimarans are extremely spacious and offer as much comfort and space, if not more, than catamarans do.

Another difference between trimarans and catamarans is their weight. While trimarans can potentially be built lighter than some catamarans, catamarans are lighter on average due to having one fewer hull requiring structure and ballast.

The weight distribution of a trimaran is also different from a catamaran, with more weight concentrated in the central hull. This feature provides better stability and performance in rough seas and upwinds.

Catamarans, on the other hand, can support more load than trimarans. This feature makes them ideal for long-distance cruising and liveaboard lifestyles.

Frequently Asked Questions

Q: which has better resale value – trimarans or catamarans.

Resale values for both trimarans and catamarans can depend on factors such as the boat’s age, maintenance, and overall condition. Generally, catamarans have a larger market and may hold their value better due to higher demand, especially among cruisers and charter companies. However, a well-maintained trimaran can still attract buyers who value speed and performance.

Q: Which type of boat is more suitable for long-distance travel: trimaran or catamaran?

Both trimarans and catamarans are fantastic for long-distance travel. Still, catamarans are often preferred among sailors for extended cruising due to their larger living spaces and privacy on board. However, if speed is a critical factor for your journey, a trimaran might be a more attractive option.

Q: What factors should I consider when choosing between a trimaran and a catamaran?

When deciding between a trimaran and a catamaran, some key factors to consider include your intended use, performance expectations, available space, and budget. 

You should ask yourself:

• What are your primary sailing goals – speed, comfort, cruising, or racing?
• How much living and storage space do you need for your crew and equipment?
• What kind of stability and performance characteristics do you value most?
• Are you willing to compromise on space or speed for the sake of your preferred multihull design?

Final Words!

So, what’s the best boat? Well, both are great. The choice between a catamaran and a trimaran will depend on your needs and personal preferences. If you are looking for a peaceful trip at a slower pace with plenty of space for the whole group, a catamaran will be your best bet. On the other hand, if you want to zip through the water and get your blood pumping, a trimaran is what you need!

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Have you sailed a catamaran or a trimaran? If so, please share your experience in the comments below.

Daniella has been passionate about travel, the sea, and nature for many years. As a child, she frequently traveled throughout the Mediterranean and continued with her journeys throughout her adult life.

Her experiences have created the desire within her to share her love for traveling with other passionate and adventurers who want to discover beautiful horizons and new cultures.

26 thoughts on “Trimaran VS Catamaran – Which Boat Is Best?”

Hey, well I’m definitely the Catamaran girl. I love my space and don’t really need the thrill of the ride as much as I value the relaxation and holiday-type feeling. What’s your personal choice? Well since I’m more the sailor’s wife than the sailor, those other problems don’t really apply to me, do they? hahahaha what’s your personal choice?

We have something in common, because I am not a fan of racing . I love comfort and space, so I would go for a Cat!

Have a great day:)

I would go for the trimaran as it’s more stable in tough conditions as I would like to explore the world, not that I want to race. Catamaran is my go to option if I just want a nice vacation boat or something I agree that that one is better if you don’t want to race. I won’t buy a boat in the near future though, I certainly have not got the money, and I live at the wrong location, not far from the sea but still, I can’t even drive (no license). Great article though and I love boats. Wondered what the difference about these 2 are and now I know.?

Hi Stephanie, Sorry for the late reply. I had a minor technical issue:) Yes, trimarans are extremely stable and are faster than catamarans. However, those beautiful boats are quite expensive and if you plan on sailing around the world, you’ll need a small crew with you to handle the boat:). I am glad this article helped you know what’s the difference between a trimaran and a catamaran. Let me know if you need more info. I am always happy to help. Thank you for the comment and I wish you a lovely day.

This is a very informative comparison of the trimaran vs. catamaran style sailboat. They look similar on the exterior to the untrained eye – but it seems like the differences are pretty dramatic. If someone was looking to charter one for a vacation – do you have a specific experience or preference for one or the other?

It will depend on your personal preferences!

What are your needs? Can you be more precise?

I personally love to sail in comfort, I also need a lot of storage, so a cat is my favorite yacht!

Have a wonderful day:)

I have sailed ON a cat but never sailed one myself. Certainly a wonderful experience unlike a single-hulled vessel that rocks and rolls with the swells. That leads me to ask: if caught in rough weather (large swells and strong winds), how reliable is the trimaran? Does either configuration have limitations in this regard?

For the same size of boat, a trimaran have higher sailing performance ,a better ability to tack and go windward. So to answer to your question, a trimaran will handle better in strong winds and will go faster! But! Bear in mind that no matter if it’s a cat, trimaran, or monohull, the safety will all depend on when the sail will be shortened and how the boat will be handled in bad weather.

I hope it helped and if you have any other question , please feel free to get in touch:)

Have a great day!

Awesome write up on the differences between the two beauties. I have learned something new here. I am more of the adventure like person and your quick analysis of the Trimaran, tells me that I probably would lead to this option when choosing between the two.I will certainly browse around your site to check out other interesting articles you have on offer.Take Care, Roopesh.

Hi Roopesh,

Thank you for the compliment and you are very welcome to stroll around my website.

Take care too and wish you an awesome day!

It’s interesting to see the different opinions shown concerning of a debate. I don’t know about these vessels but I enjoyed reading it.

To me, I’ll go for Trimaran because of the modern interiors. I mean, it’s the modern feel that I’m looking for. That’s my main, personal factor.

Still, overall, I think it’s also suffice to say that these two cannot be compared because it’s not like with like. But that’s just my opinion. Trimaran for the win anyways!

So nice to see you again on my website:)

Yes, the trimaran Neel 45 has a modern look, but not every trimaran. Also, they are much faster than catamarans, sailors usually use them more for racing and catamarans for cruising.

Thank you for the comment, I really appreciate:)

I wish you a wonderful day!

I think now the Neel have brought out the 51 the game has changed somewhat. Lots more room ,walk around bed in master room. Lare shower in main head, the inside outside Cocloon as they now call it. Heaps of space below, fantastic headroom down below in central Hull. Much more classic looking boat on the exterior. Add the speed, stability and affordability compared to similar sized Cats and there really does not appear to be any more to be said. Of course it’s just my opinion and if money was not an option i think the Gunboat 60 would be the final choice, but for around 600k the Neel 51 has definitely set the standard. Take a look https://www.youtube.com/watch?v=1-997AEXfsk

Well, that’s a beautiful trimaran you have here, effectively, this one looks much more comfortable and wider than the Neel 45! I would definitely choose the 51 over the 45! I’ve really enjoyed watching the video, and it would be interesting to write an excellent review on the 51:). I agree with you, the Gunboat is such a beautiful cat, and now it makes it even harder to choose between the two of them:) Thank you for the comment and wish you a wonderful day!

Late arrival here but after reading and watching so many negative reviews about the Neel trimarans and the Neel 45 images of one build showing their train wreck quality, there is absolutely no way you can compare a Gunboat and a Neel. You’d be better off comparing it to the Yugo automobile.

The “Sailing Yacht Ruby Rose” did a recent video review of the newer Neel 47 posted on July 18, 2019 showing very clearly that its build quality is extremely lack luster. Although it was the Neel Trimaran that gave me the sea bug, one probably couldn’t purchase a poorer quality boat at any price. It’s an awesome concept but it’s a manufacturer no individual should consider buying from. I’m hoping one of the premium Cat builders will take on the task of providing a similar concept when I’m ready with my money.

Hello Eso, The beautiful thing in life is that everyone has different taste and opinion. I am glad to have you here and thank you for sharing your experience with the readers, this will certainly be useful to many people. I wish you a fantastic day!

Yes I’ve been looking at the Neel 51, Its turning my attention some what. It would make world cruising just that little bit faster and with room and comfort. PS I like the engine room.

Hi Mercury,

Thank you for the comment! The Neel 51 is a beautiful boat. She is more spacious and comfortable than the 45 Neel, but the 65 is even better! However, the 51 is an ideal cruising trimaran to sail in comfort. She provides everything sailors have ever dreamed of such as speed, stability, space, and luxury. What more to ask for:)

Thank you again for the comment and wish you a wonderful day!

I own a Catana 47 with one owner and two guest cabins. I and my wife want four cabin boat so that We can sail with our two daughters and their family including grand children. Should I buy Catana 53, Outremer 51 or Neel 51?

Thank you for commenting!

I am not a boat seller, but I will be more than happy to answer your question. The Catana 53, Neel 51, and Outremer 51 are fantastic boats. And to be honest, I would personally buy the Neel 51 because she is extremely spacious, lightweight and more stable than any catamaran out there.If you bring children, then you would want the boat to be safe. The other boats are also great but tend to perform less well in strong winds and heavy seas than the Neel 51. So yes, the Neel 51 is unbeatable in all categories! At least to me:)

I hope it helped and, please, feel free to contact me if you need to know further information. I am always happy to assist!

Thank you again for the comment and wish you a lovely day!

It’s really a good Information. I have never been in any one of the rides but I feel personally Cat is better. Do you guys know anything similar to this other then Cat trimaran like Semi-Submersible, drone etc. as I am doing a project that will help you to ride Cat Yourself alone!. Wish me good luck and please help me achieve my goal fastly, by sharing your precious knowledge and time. thank you in advance.

Hi Mohammed,

We would like to help you, but we didn’t really understand your question, could you be more specific, please?

Thank you for the comment!

Hello Daniella, Firstly thank you very much for your kind response. I would like to have some info about the Stability equation of Catamaran and different steering Mechanisms.

You are very welcome!

Please, check out these articles, I am sure you will find all the answers to your questions: file:///C:/Users/gofri/Downloads/6962-1-10720-1-10-20130718.pdf

http://www.sailingcatamarans.com/index.php/faqs/19-sailing-and-performance-questions/109-which-steering-system-should-i-use

I hope it helped! Don’t hesitate to contact me if you need more information, I’ll be more than happy to assist!

Dear Daniela Thankyou very much for your Kind help. Could you please give some Information about the construction guidance of Catamaran. I want to construct my own for my experimental purposes. Thankyou Regards Moulasaheb Md

Hi Mohamed,

I would like to help you, but you are not in the right place for this. If you are looking for sailing holiday, then I’ll be more than happy to help!

If you want to construct your own boat, I highly recommend you to check other websites.

Thank you for the comment and wish you a great day!

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With the confusion of genres caused by the super-powerful ocean racing multihulls, the conservatism of monohull sailors and the high commercial stakes, the risk of capsizing is still a taboo subject for many people in the world of two or three-hull sailing boats. However, rather than just focusing on hearsay, Multihulls World suggests a rational approach to the subject in order to get a better understanding of the situation.

The risk of capsize on a catamaran of more than 40 feet with a displacement of more than 10 tons is almost non-existent.

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Published 26/05/2023

By François Trégouët

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The action takes place on a brand-new large cruising monohull during a press test. The yard has invited a serious potential buyer to join us. The potential buyer was full of praise - which was well deserved - for the excellent vessel, much to the delight of the shipyard’s marketing director, who was also on board. What a surprise when both of them agreed that they would never go on a long cruise in a multihull, or that they would not even cross the Atlantic in the trade winds during the best season on a cruising catamaran, under the pretext that a multihull would be “as stable upside down as the right way up”. I, who had been so discreet until then, keeping my intimate passion for multihulls secret so as not to offend anyone, lost all sense of diplomacy - my blood ran cold. I heard myself blurting out a sentence I thought I had forgotten: “like a monohull which is as stable on the water as it is on the bottom!” The atmosphere in the cockpit suddenly became rather tense... Misunderstanding and confusion have allowed such prejudices to persist. Regattas and offshore racing have largely contributed to this (bad) reputation. But you really can’t compare those racing machines with our cruising multihulls. Even among extreme vessels there are differences. An Ultim trimaran takes off in around 16 knots of wind. An Ocean Fifty sails on one float from 13-14 knots of wind, while an Orma 60-footer makes do with 11.5 knots. Even more extreme, the BMW Oracle trimaran in the America’s Cup rises up from 7 knots: a real lake boat! Moreover, on board a Decision 35, if the wind rises to 20 knots on Lake Geneva, the boat becomes unmanageable. Out on the open sea, alone, the risk is tenfold because the reaction time is longer, whereas anticipation is more necessary than ever. But let’s concentrate on our cruising multihulls. Even if it is statistically insignificant - in recent times there have only been 1 to 5 capsizings of multihulls over 30 feet per year out of 15,000 cruising multihulls that are currently sailing (we are not talking about shipwrecks or total losses caused by hurricanes like Irma). That means the risk is 0.017% per year. Over the lifetime of a boat – say 40 years - this amounts to 0.67%. Compare this with the risk of a car accident - 1 every 70,000 km in France, according to the Road Safety Department, or 1 every 7 years (the average mileage of a car being 10,000 km/year globally). So, a 0.017% risk of capsizing for a multihull every year, against 14% of having an accident on the road for a car, certainly raises a few questions don’t you think? However, even if it is insignificant, the risk of capsizing on a large production catamaran or trimaran does exist. The proof? It is regulated by the standard that all manufacturers must respect. Thus, at the helm stations of all good modern multihulls, three small yellow triangular pictograms prevent any temptation to turn a blind eye. The first one, an exclamation mark, draws our attention to a ...

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> > Please support our sponsors and let them know you heard about their products on Cruisers Forums. 08-11-2006, 17:03   . Trimarans are wetter while pointing...that upwind "Ama" knocks the top off every wave spraying everywhere. Trimarans have less stability at as it rocks to either the port or starboard Ama as you move around. is a great , love em, wish I had one but it will never outsail a . We crewed on a while in the and got annihlated by an older gemini. Gemini has a center board(s) not . Neither are they the to sail around the world in, they are coastal cruisers. We never had any concern navigating with one , it's really a non-issue as we had no probs but obviously twins would be better at getting around in tight spots. Duckhead 08-11-2006, 17:09   Boat: 50ft powercat, light,long and low powered   08-11-2006, 20:18   Ian Farrier, who has designed many tri's and at least one cat states that at over 40 feet a cat makes more sense because the space increase is dramatic. I agree but I would say that it happens closer to 35 feet really. 09-11-2006, 08:34   Boat: CSK, 33' Aita Pe'ape'a design is in its infancy. It really only started in the 1950's. I have noticed that designs dictate peoples opinions on the two . Modern catamarans are too big inside and far too heavy. Most trimarans now are foldable and small. They are also fast. Orange 2 is the fastest boat in the world. It is a . If you want any performance do not go with a PDQ or a Gemini. They are slow. If you want space they are both good. Catamarans with good accomadation under 40' are slow and look bulky. A well proportioned cat in my opinion is the Gunboat 48. Some would say that this is a performance boat but I would disagree. All cats should perform! There are other good cat designs out there as well. I like the Conser catamarans and believe they are well proportioned. Under 40' Trimarans are great because the middle is very livable. On a small cat if the properly proportioned it is a bit small. However catamarans take advantage of the hulls. Most trimarans do not use Amas for accomadation. The horstman tris along with a few others did. My 33' 1964 CSK cat is not perfect. However it does have more accomadation than an F 31. It also has topped 20 kts. double digits are EVERY DAY. Some would point out that the hulls are only 2 feet wide. and that the boat weighs 4000 pounds. I guess what I'm trying to say with all this rambling is that they both can be great . And it depends on the design. I think there is a lot to look forward too in design. Tristan 18-11-2007, 00:00   between cats & tris was done. The conclusion was that tris are more prone to wave (under "ultimate" conditions) while cats tended to be more prone to . That being said, it worth noting that most cruising designs, either type, generally can take lot of bad & sea conditions before ever reaching that critical state nearing a capsize. Trouble is, if it happens, it's well documented that it happens rather suddenly, and not always under conditions you might expect, such as massive storms. Heavier cruising designs however have excellent records, and boats such as the Heavenly Twins 26 or 27 cats have circumnavigated, crossed oceans, all with no negative circumstances. Same with most cruising designs too. Good seamanship is paramount of course, and preparation, plus a little good luck thrown in of course. Regarding accomodation, I mentioned the Heavenly Twins as the design has huge accomodations for such a small cruising cat. You simply won't find the same level of accomodation in any near that size. Larger designs can have much more accomodations than same size tris, up to the roughly 37 - 40 foot range, where, depending on the design, some tri's have interiors easily rivaling that of similar sized cats. However, remember that each type has it's space arranged according to what's possible. Tris under roughly 40' generally never had space in the outer hulls for real cabins, even smallish ones, and accomodations for daily living by necessity are in the center . Cats of any size can usually have good in each hull, with standing in the bridgedeck only in designs starting close to 28 - 30' (the HT 27 being one of the smallest with standing headroom on the bridgedeck cabin). Also, if you intend to the boat often, or at a , a cat takes up less beam than a similarly sized tri, which may affect . Cat's & tris also handle a bit differently, but it's not a major concern and easily learned as you sail each type. 13-06-2008, 08:58   powerboat[Florida],but just fell in love to cats.I know nothing about them,will go to get courses next 3 weeks.In 6 month I'd like to buy cat about 40-43.Still don't know--what kind is more save...[I have properties in and thinking to reach it].Thank You. 13-06-2008, 12:42   Boat: Searunner 40 trimaran, WILDERNESS associations, contact multihull brokers, subscribe to Multihull Magazine and contact people therein, go to and find owners (give them a hand rather than take up their time), or try to catch one while sailing and get a contact from them. Those are the things I did thirty-some years ago to decide which boat I was going to build. Even then, there were plenty of incredible designs that were worth the effort to discover. Browns, Kantolas, Crosses, as well as a bunch of really hot British and Aussie designs. Today there are even more, in more sophisticated construction techniques. Go do the yourself, or you will kick yourself later. 15-06-2008, 12:56   Boat: PDQ 36 & Atlantic 42 to your range, easily done using Yachtworld.com . A more difficult parameter to define is the quality of construction, which will require you to look at a lot of boats. Try to get a look at the unfinished and hidden of the boat to develop a feel for the builder's standards of construction. On an older boat you can expect to see a lot of older , but if it works and doesn't look like a prop from "On the Waterfront" its a sign the boat has been continuously maintained. Use a tough . 15-06-2008, 13:36   Boat: Searunner 34 and Searunner Constant Camber 44 of the boat to develop a feel for the builder's standards of construction. On an older boat you can expect to see a lot of older , but if it works and doesn't look like a prop from "On the Waterfront" its a sign the boat has been continuously maintained. Use a tough . 17-06-2008, 05:18   Boat: B24 17-06-2008, 06:48   Boat: Privilege 37 17-06-2008, 07:46   Boat: B24 17-06-2008, 08:03   Boat: Privilege 37 17-06-2008, 09:06   Boat: PDQ 36 & Atlantic 42 have to be ferried back and forth in an open . Small point. I fell in love with the tris of the 60's, and formed firm opinions about everything before I ever sailed a boat. I'm still kind of wistful about thos dreams, aided by the fact that always drew a few extra female figures in his ads! For anyone looking, there are some PDQ 32's on the market for under 6 figures (yes, thats still a lot of money) but they a remarkably good sailing boats, build by master craftsmen in the Whitby tradition. I owned one, and the only thing my 36 offers over the 32 is more waterline, and easier transit from the to the bow. Yes, a well prepared Gemini (in the hands of one of the few Gemini masters) is faster than a PDQ. But not otherwise. So what are you going to do NOW if you don't have the wherewithall to snag a $90,000 boat loan? Buy older, buy smaller, buy smarter; maintain and improve to yacht standards (i.e. nothing from home depot) and move up when you can. Don't do anything on your boat a hard- nosed surveyor wouldn't approve of, or your potential future market will be limited to the rare dreamer-with-money. But in the meantime, stop dreaming and start sailing. Just do it. 17-06-2008, 09:19   Boat: PDQ32 Yes, a well prepared Gemini (in the hands of one of the few Gemini masters) is faster than a PDQ. But not otherwise. Thread Tools Rate This Thread : Posting Rules post new threads post replies post attachments edit your posts is are code is are are are Similar Threads Thread Thread Starter Forum Replies Last Post Gisle Multihull Sailboats 56 30-03-2008 14:19 Kelldog Multihull Sailboats 13 16-11-2006 15:45 Steven Prince Construction, Maintenance & Refit 12 01-11-2006 20:10 Jack Dusty Multihull Sailboats 10 10-10-2006 04:54 Dreaming Yachtsman Multihull Sailboats 37 06-10-2006 13:07 - - - - - - - Privacy Guaranteed - your email is never shared with anyone, opt out any time. Catamaran vs. Monohull: We Changed, Should You? There are two schools of thought when it comes to monohull versus catamaran . We have done extensive cruising and lived aboard two monohulls and four catamarans over the past 25+ years . We experienced the good and the bad for both single hull and multihulls first hand. Quite honestly, the pluses for catamarans far outweigh the minuses. There are multiple benefits of catamarans. They are faster, more stable and spacious, and have shallower drafts allowing safer anchorage closer to shore. Being on a stable platform with no heeling cuts down on crew fatigue and seasickness leaving the crew more alert and in control of the vessel. Even novice sailors feel more confident on catamarans. When we built our monohull Royal Salute in the early 90s, catamarans were not established and were looked upon with extreme suspicion by most cruisers, including ourselves. “Safety and the capsize” issue were always the first things to come up against sailing catamarans. It is a fact that monohulls can get rolled in heavy seas but will right themselves because of the heavy lead keel, and while crew and vessel will be battered, the roll is survivable. However a catamaran once capsized, will remain upside down (jokingly referring to this state of the catamaran as “reaching its most stable position when upside down”). The inability of a catamaran to self-right was and still is a major bone of contention. However, what is not often discussed is that a monohull has about a 5,000 pound keel of lead that is constantly trying to drag the boat to the bottom of the ocean versus a catamaran that has no ballast and is in most cases with modern catamarans, unsinkable. So the options are to either sail the world on a boat that, if it springs a leak, will sink like a stone or a vessel that cannot self-right in the event of a capsize but will not sink no matter what. So from a practical point of view, here are our observations over the last 25+ years of living aboard, on the advantages and disadvantages of a catamaran. ADVANTAGES OF A CATAMARAN 1. speed equals safety. The speed of a catamaran makes it possible to outrun bad weather. While catamarans do not point as high into the wind as a monohull (or if it does, it makes more leeway or slides sideways), it is about 20% faster than a monohull. This means that even if you sail upwind at a slightly wider angle to the wind than a monohull and have to cover more distance, you will still arrive at your destination long before a monohull. A modern performance catamaran with daggerboards and good quality sails will point as high as a similar sized monohull. It will point the same as a comparable monohull and sail much faster and therefore arrive at an upwind position much sooner than a the monohull. It is important to note that most of the production catamarans on the market are under-powered and are equipped with standard smaller sails. In lighter breezes many of these designs perform poorly unless fitted with bigger headsails, a Code Zero and a square-top mainsail. While we believe that more comfortable and safer in rough weather , we have to concede that when the weather gets really bad (60 knots of wind or more) we would personally prefer to be on a monohull from the standpoint of surviving. I would say that a monohull is preferable for serious offshore single-handed sailing because you can more easily hove-to in a monohull. We have been in some extreme weather on a number of catamarans and never really felt that we were in danger, although it takes some nifty seamanship. A monohull could capsize in extreme weather or even roll in a storm, but they generally come back upright. A catamaran on the other hand, will not right itself. But the cat will generally stay afloat, offering a good place to survive while you wait out the storm or until help comes along. Well-designed modern catamarans are very hard to capsize though. Having said all that, most catamarans can do 200 to 250 miles a day and with modern technology allowing one to pull down weather at will, there is no good reason why you should get caught in extreme weather. A faster boat is a safer boat as it will in many cases be able to outrun bad weather. With good weather routing information a catamaran can avoid most serious weather and, at worst, place itself in the most favorable position to avoid the brunt of a storm. 2. A Catamaran is a Stable, Safe Platform Underway Catamarans have no ballast in the keels like monohulls do and therefor it relies on beam and buoyancy for stability. Typically cruising catamarans will have a beam to length ratio of roughly 50%, although many designs nowadays exceed the 50% rule of thumb. So, a 45-ft long catamaran will be about 22-ft wide, providing a very stable platform when sailing. Unlike catamarans, monohulls cannot overcome the rolling and pitching with their narrow beam and the lead ballast for stability. This rolling and pitching makes the deck on a monohull very unsafe whereas on walking around on the deck of a catamaran while underway is far easier since the boat is much more stable, and it doesn’t heel. This makes sail changes and reefing much easier and a lot safer for the crew. Without the rolling and pitching motion, the danger of falling overboard on a catamaran is considerably less than on a monohull. 3. Crew Fatigue Reduces on a Catamaran Because a catamaran does not heel over like a monohull, it offers far more comfort underway because the motion is mostly fore and aft pitching and very little beam-to-beam rolling. On all points of sail, a catamaran tracks upright and significantly reduces crew fatigue and seasickness. Seasickness is usually caused by things like anxiety, fatigue, hunger and cold, which all add to a sense of disorientation. This leads the crew to making bad decisions and seamanship errors that could be fatal to the crew and vessel. The more stable platform of the catamaran will hugely keep those issues at bay, making the crew more alert and energized. Every action and chore including cooking is much easier on a catamaran when underway. It is much more pleasant to be on the deck level looking out rather than being stuck “down below.” It is also much nicer to sleep on a boat that doesn’t heel. I remember nights at sea in our monohull when I was rolling around in my bunk unless I was properly wedge in a little corner. That is simply not the case on catamarans. All these factors ensure that your crew will not expend unnecessary energy to simply try and stay upright, onboard and safe on a long passage. Your crew on a catamaran will be well rested and alert and will be able to function well if a stressful situation arises. 4. Comfort at Anchor Catamarans provide a wide platform and therefore offer lovely spaces to relax at anchor without the rolling motion that monohulls have a tendency to do in a swell. During our 15 years of cruising on a monohull, we have often had to leave anchorages that we really were not finished exploring because of a rolly, uncomfortable anchorage. Big rollers or swells coming into an anchorage can make conditions in an anchorage very uncomfortable and unsafe. We were anchored off Funchal on the island of Madeira in our monohull Royal Salute once, when we were forced to leave our anchorage. The rolling became so bad, we were rolling from gunnel to gunnel. The anchorage became untenable to remain anchored, forcing us to go out to sea in foul weather in the middle of the night. This is an extreme case but believe me, we have left many an idyllic anchorage because of a rolling swell into the anchorage. Catamarans, on the other hand, do not roll from like monohulls have a tendency to do and are far more comfortable at anchor. 5. Anchor Bridal Setup Catamarans are fitted with a bridle, attached to both bows and down to the anchor chain, resulting in a very stable position at anchor. What we found with our monohull was that because the bow acts as a sail (because of the high freeboard), the boat tended to sail at anchor in high winds. It sailed in one direction until the chain snatched and tacked over and sailed in the other direction, feeling like it might dislodge the anchor altogether. The catamaran on the other hand sits at anchor a lot more stable and doesn’t sail around as much. 6. Ease of Boarding on a Catamaran Thank goodness we were much younger and more agile during our monohull days. Royal Salute and most monohulls of her generation or older, have high free-boards, making it quite a feat to get onto the boat from the dinghy. It was one of the most challenging things to do because unlike the more modern monohulls that have a scoop at the back, we had to climb up on the side of the boat to get on and off. We, of course rigged steps, etc. but it was always a hassle compared to the ease of getting on and off a catamaran from a dingy or from the water. 7. Shallow Draft Equals Better Anchorages Catamarans have significantly shallower drafts than monohulls, allowing for safer anchorages closer to shore. Most catamarans in the 40-ft to 50-ft range draw between 3-ft to 4.5-ft, so they can anchor in places that a monohulls can not even consider. In the shallow waters of the Bahamas for example, the catamarans have a big advantage. We often anchor our own catamaran just a few feet away from a beach. It definitely allows one to be able to explore areas where the water is shallow without the fear of running aground. The shallow draft also allows for emergency repairs in shallow water and even doing the bottom job when the tide goes out as we have done in places like Mtwapa Creek in Kenya, East Africa. The catamaran easily rests on her keels on the sand without help making it a breeze to do the “annual haul out” even in remote locations. 8. Dinghy Davits & Dinghy Size All catamarans have a set of davits that make it very easy to raise and lower the dingy. Our monohull and most cruising monohulls do not have an efficient or easily accessible set of davits. This makes raising and lowering the dingy an elaborate production. Catamarans on the other hand, has davits systems easily accessible and some even have platforms to rest the dinghy on. The lack of beam and difficulty of lifting the dinghy also limits the size and type of dingy that one can reasonably carry on a monohull. As we all know, the dingy is your transport to and from shore and diving or fishing spots, so the bigger and faster the dingy, the better off you are. A catamaran can carry both a heavier and bigger dinghy which makes the popular center consul dinghy so much more possible. 9. Interior Space and Comfort on a Catamaran We sailed 32,000 NM on our 45-ft monohull, happy as clams, not realizing that sailing does not have to be done lying on your ear 24/7 while on passage or sitting knee-to-knee in the cockpit at anchor with your two other guests at the dinner table! One can liken sitting in a monohull cockpit to sitting in an empty Jacuzzi, you are always nice and close to the other folks. Now that we are on our fourth catamaran, there are a few things that have become more evident to us than the incredible space and comfort of a catamaran, not only at anchor but also underway. The cockpit and living space in general are huge compared to a monohull, making for very comfortable and spacious living conditions. It feels more like you are at home, rather than just on a camping trip. Knowing that one spends at least 90% of one’s cruising life at anchor, it’s important to have good open living space, which most modern cats nowadays offer. A lot of cats have walk around beds, lots of storage, every modern appliance including washer/dryer, etc. However, one has to fight the urge to fill the space if you want to keep the cat light and fast. Sailing with guests onboard for extended periods of time, in close quarters can become claustrophobic but on a catamaran people are spread out and separated. With guests sleeping in one hull and the owners in another, catamarans offer much more privacy and separation. Some cats even have privacy doors that will close off the entire hull and has a separate entrance onto the deck, which really separates you from the guests completely. There is very little heeling on a catamaran, so there is no need for hand grips and safety harnesses inside the boat. There is nothing better (and safer) than being able to walk from the cockpit into the living room (saloon) on one level or one step down at most. In a monohull, when heeling at a severe angle, you would have to claw your way from the companionway steps down to the living area, while fighting to stay upright, significantly tapping your energy. Unless you hit extreme conditions, everything stays put on a catamaran reducing the anxiety before doing passages of having to stow and secure everything. This very issue makes a lot of cruisers reluctant to weigh anchor and explore more often. It is just too much effort to pack away all your stuff once comfortable in an anchorage! One thing you will notice is that the stove on catamarans are not gimbaled like it is on monohulls and this should tell the story in itself. The stability and comfort on a catamaran is far superior. Cooking is easy and safer. I often open a nice cold beer, put it down to do something and forget about it only to find a warm beer later in the same place I left it. This is not something that happens on a monohull.      10. Redundancy on a Catamaran Unlike monohulls, catamarans have a lot of critical redundancies. That of course means two hulls to clean and anti-foul, double the engine maintenance, etc. but having two of the critical equipment like engines for instance, outweighs the downside. With two engines, if one fails you still have adequate propulsion to go anywhere. If by some fluke the second engine also fails, you have a full set of spares to fix at least one of them. Our friends once hit a sleeping whale off Tanzania, and when it dove, it hit the prop, bending it. They limped into the narrow channel on the one engine but at least they could make it to a safe harbor where we surveyed and repaired their damage. We often only use one engine when motoring while making passage in order to conserve our fuel. The one engine is totally capable of moving the boat along at a good speed unless you are in heavy seas and you may need more power. Other than that we only use two engines to dock or maneuver the boat in close quarters. Because there are two engines there are also two independent charging systems via the alternator on each engine. If one alternator goes out, there is still another complete charging system. There are two rudders and if one fails or falls off (as has happened to our friends on a monohull off Columbia, where they almost lost their boat) you have a second rudder that is completely capable of steering the boat by itself indefinitely. That holds true for several things on a catamaran!      11. Maneuverability The engines are spaced far apart on a catamaran and it makes maneuvering much easier and more precise than monohulls, unless the monohull has a bow thruster. We did not have a bow thruster (not many monohulls do) and had to rely on prop-walk and using prop wash on the rudder. A modern catamaran can do a 360 turn on her own axis. A monohull cannot do this and have a bigger turning circle. However, a monohull under sail is much more maneuverable and certainly will tack a lot faster than a catamaran. The ease in maneuverability under engine on a catamaran in close quarters specifically, is vastly superior comparatively. 12. Rigging Because of the beam on a catamaran the spinnaker pole has become unnecessary equipment. Hallelujah, I say. That pole on our monohull was a pain the behind and I always hated having to use it. On a catamaran, one can fly an asymmetrical cruising chute or spinnaker, using the bows to tack the clew or run a guy through a block so it is very much simplified, easier and safer.We also sail wing-on-wing with twin headsails when we sail downwind. We use our furling jib and furling Code Zero. It is as easy as one, two, three. DISADVANTAGES OF A CATAMARAN 1. bridgedeck slamming. One advantage most monohulls do have when underway is that they don’t slam. Catamarans with a low bridgedeck clearance can experience significant slamming in confused seas sailing upwind. This slamming can be quite disconcerting when you first experience it as we did on a Shuttleworth 44 design, our first ever catamaran experience, 20+ years ago. At times, it felt as though the boat was falling apart. Of course the boat was fine but nevertheless, the stress on the crew from the constant noise and discomfort was significant. Monohulls don’t have a bridgedeck which means no slamming and are therefore a bit more comfortable than l ow bridgedeck catamarans when beating into severe confused conditions or “washing machine” conditions as we call it. Modern catamarans mostly have better bridgedeck clearance and the slamming is significantly less. However, not all cats have a good clear tunnel under the bridgedeck. Some manufacturers build beds into the bridge deck in order to make more space in the chest of the catamaran where the slamming occurs. These protuberances into the bridgedeck tunnel will likely increase slamming. So be mindful of that when selecting a catamaran. We currently own a Bali 5.4 and the bridgedeck clearance on this boat is more than adequate and the tunnel is clear. We therefor experience very little slamming compared to our Prout 45 that we previously owned (picture of sister ship below) with a much lower bridgedeck. We Explain Bridgedeck Clearance In the pictures below, the Bali 5.4 has very good clearance from the water to the bridgedeck and has a nice clean tunnel versus the very low bridgedeck of the Sunreef 50.  2. Sailing Downwind Monohull spreaders are set at 90 degrees to the mast whereas a catamaran has to have backswept spreaders. The reason is that, on a monohull, there is a backstay and using this, plus the intermediates you can get a nice pre-bend in the mast (the pre-bend is to flatten out the main sail and allow for better performance). On a catamaran with no back stay, you need to use the back swept spreaders and the diamonds to pre-bend the mast. The reason I point this out is because on a catamaran, if you want to broad reach or run, the mainsail cannot be let out all the way because the backswept spreader tips could punch holes in the fabric. On a monohull, the spreaders are at 90 degrees so you can let the main and the boom out much further which is, of course, much more effective. This is one of the reasons it is better to broad reach and tack downwind on a catamaran. Whether a monohull or multihull, sailing dead downwind doesn’t usually make great VMG. Therefor a regular cruising cat, much like a monohull, needs a lot of sail area and has to sail deep downwind if it is to achieve a decent speed made good (VMG). This video demonstrates how we achieve this by sailing wing-on-wing downwind. It is more difficult to find a dock either as a transient or a permanent slip for a catamaran in general because of the wide beam. But this is changing fast and will soon not be too much of an issue. In the USA dockage is charged by the length of the boat in feet, so there is no disadvantage there but, in some places, (the Mediterranean for example), dockage is charged at length times one and a half because of the additional beam. Since the catamaran is stable at anchor, we mostly anchor out. We have more privacy, a better breeze and usually a stunning view.We have a nice dinghy with a good outboard engine and is big and comfortable enough to get to shore fast and together with the modern conveniences like the generator, watermaker and washer/dryer, docking becomes a non-issue. It is definitely more difficult to find a travel lift with enough beam for a catamaran for a haulout, while, for a monohull, there are absolutely no problems anywhere. The wide beam of cats also greatly limits the number of shipyards that can haul them out. Most catamarans over 40-ft must be hauled out with a 50-ton travel lift. This not only increases the cost of the haulout, but greatly limits the choice of the shipyards for repairs and maintenance. With limited choice, prices are high for shipyard services. Catamarans do tend to have a lot more windage than monohulls. This can be an issue especially when maneuvering in close quarters with a strong wind. But I have found that, provided the engines are powerful enough for the size of catamaran, that twin engines negate this problem. Also, many modern large catamarans now have a bow thruster fitted. It is super easy to dock. The cost of getting into a catamaran is much higher than that of monohulls. That could put a serious dent in your cruising kitty or require you to put your dream on hold a little longer. Pre-owned monohulls on the other hand are very cheap to buy comparatively, because the supply presently far outweighs the demand. Catamarans are in high demand and they typically hold their value much better and longer and the trend is now heavily in favor of the catamaran market. When prospective buyers contact us for catamarans under $250,000 the choices are very limited and catamarans under $100,000 is near impossible to buy. In this case, your best bet is to go with a monohull unless you go with much older boats like the Prouts or the less expensive Geminis. Our Own Catamarans & Monohulls FYI: Royal Salute , a Bruce Roberts 45 monohull, was the first boat we owned and sailed approx. 30,000NM on. Mythral, a Seafarer 30, was our “toy boat” while we were waiting for our catamaran to be built. Even though this classic little monohull sailed around the world, it didn’t have much in modern conveniences like running water. Siyaya was an Island Spirit 40 catamaran that we sailed from Cape Town to Florida on and then taught live-aboard sailing classes for several years. Zuri I was a Prout 45, a beautifully crafted catamaran but by today’s standards is considered old technology. Our Lagoon 450 SporTop ( Zuri II ) is a fantastic live-aboard catamaran. We lived and taught aboard her for three years but sold her last year and we currently own a Bali 5.4 ( Zuri III or Z3 as we call her now). Read about our various boats . CONCLUSION: CATAMARAN vs MONOHULL We were dyed in the wool monohull sailors for 15+ years. We loved the pretty lines of monohulls, the sailing ability and what we believed at the time to be much safer vessels. However, now that we have been avid catamaran enthusiasts, we simply can never go back to monohulls. Catamarans have come of age and with modern technology have overcome most objections that sailors of old had against them. They are well designed and built, are safe, and we simply love that they sail fast and upright. There is not a whole lot to dislike about a catamaran when you live aboard. We have weighed all the pros and cons of catamarans and found that the pros far exceed the cons. We made the change to a catamaran and do not regret it one bit! We hope that this article will clear things up for all the prospective catamaran owners out there. Contact us if you have any questions regarding catamarans, Fractional Yacht Ownership or our Charter Management Programs . Estelle Cockcroft Join our community. Get the latest on catamaran news, sailing events, buying and selling tips, community happenings, webinars & seminars, and much more! 4 thoughts on “Catamaran vs. Monohull: We Changed, Should You?” I read that the engineering on the catamarans were improved over the years. Whats the oldest year would you recommend designwise? Scott, my apologies for the late reply. We’ve been traveling in Africa. Anyway, catamarans have come a long way and improvements in technology is happening at lightning speed. I reckon that even the older model catamarans are good. It depends on what your needs are. If you want something a little better performance wise, I would go for something no older than 15 years. After buying a catamaran what is the difference in expense of a catamaran vs a monohull. Many articles state that not only the initial cost of a catamaran is more it the operating cost as well. Hi Todd, it is more expensive. The annual dockage and haul out as well as maintenance will be more expensive. You obviously have two engines to maintain and various other pieces of equipment to service in both hulls. While there is more equipment there is also more redundancy and of course you have the comfort factor. So, depending on your situation, it’s probably worth it. Leave a Comment Cancel Reply Your email address will not be published. Required fields are marked * Save my name, email, and website in this browser for the next time I comment. Recent Posts Top 10 Reasons to Sell (and Sail) Your Catamaran in Texas Our Texas Office is located in the Watergate Marina Center in Clear Lake Shores, Annapolis Boat Show 2024 Meet with our team!    Want to learn more about the Bali and Catana Exploring the Catana OC 50 Catamaran: A Comprehensive Overview The Catana OC 50 Catamaran, the latest addition to the Catana Ocean Class series, Lessons Learned from Selling our Catana 50 OC Stephen and I are in the process of selling our Catana OC 50 Catamaran. For more than 30 years, we have been a part of the catamaran community and created Catamaran Guru™ to encourage and educate all the aspiring sailing out there. We understand the dream of traveling the world by catamaran and created a one-stop-shop to make that dream a reality for you. Stephen & Estelle Testimonials Get Started Yacht Sales Used Yachts Charter Management Boat as Business Programs Seminars & Events My Cruiser Life Magazine Monohulls or Catamarans – Which is Best for the Cruising Sailor? The debate between catamarans vs monohulls still rages, and most boaters are firmly on one side or the other. The truth is, either a catamaran or a monohull can provide a wonderful way to enjoy sailing, traveling, and being on the water.  Both have advantages and disadvantages, and both have large and loud fan clubs. The choice between a catamaran and a monohull depends on your budget, lifestyle, and personal preferences. My wife and I have owned both types of vessels over the years. After five years of cruising on a Lagoon catamaran, we decided to go old school and bought our current boat—a heavy, full-keel monohull. The catamaran was fun, for sure—but it wasn’t for us in the end. Here’s a look at all of the differences we learned about during our journey. Table of Contents Life at anchor, life at a dock, life underway, living space, storage space, ride comfort and motion at sea, maintenance time and costs, docking and maneuvering, capsize risk, hull breach scenarios. Rigging Safety  Rigging Strength and Configuration Monohull vs catamaran speed, thoughts on catamaran vs monohull for circumnavigation, deciding monohull vs catamaran, faqs – catamarans vs monohulls. Life on Sailing Catamarans vs Life on a Monohull Vessel At anchor, a catamaran provides superb comfort and living space. The “upstairs” cockpit and salon mean that boaters can enjoy non-stop wrap-around views.  Monohull boaters are stuck in their caves and must peek out of their small portlights or climb into their cockpits to view the world.  A modern catamaran will also have swim steps that make it easy to get on and off the boat and provide easy access to dinghies and water toys.  If there’s an uncomfortable roll or swell in the anchorage, the catamaran’s stability will make the roll a bit less noticeable. Monohull boaters are more likely to be adversely impacted in a rolly anchorage. This does not mean that the cat owners are getting a perfect night’s sleep every evening, however. Catamarans just have a different motion in rocky anchorages, not a lack of motion. Life at a dock gets a little more tricky for catamarans. Most marinas were built long before the catamaran trend and feature traditional slip sizes meant for monohulls. Marinas have to put catamarans on t-heads or make other accommodations. Therefore, it can be harder and more expensive to find a catamaran-friendly dock.  Once at a dock, the massive space of a catamaran can be harder to heat and cool efficiently. Catamarans usually need several air conditioners or heaters installed, whereas a monohull can get by with only one or two. That also means that cats might need more power (50 or 100 amp service instead of 30 amp) than some marinas can provide. Monohulls will have fewer issues finding marinas that can accommodate them, and they pay standard rates.  When sailing in protected waters, catamarans usually speed past their monohull friends. A catamaran provides a flat ride and sailors can move around their boats easily to make sail changes as needed. Walking on a catamaran’s deck is undemanding.  Catamaran sailors also have many options to rest comfortably underway. Because catamarans don’t heel over, catamaran sailors can sleep in their usual cabins. They can move about the interior of the boat with ease. Cooking in the galley doesn’t usually look any different underway. In similar conditions, a monohull will heel over. Some sailors love the feeling of being heeled over and feeling the wind in their hair. Some don’t. It can be more challenging to walk the decks and work sails on a monohull vs a catamaran. While in the cockpit, monohull sailors will want to sit on one side and may even need to brace themselves to stay comfortable. For long trips, there is no doubt that living while heeled over for days at a time is exhausting.  Moving around the interior of a monohull boat at sea is also more challenging. Monohull sailors usually sleep in sea-berths with lee cloths instead of their usual quarters. It would be very uncomfortable to sleep in a v-berth underway, as the bow may be continuously pitching in seas. The lee-cloth in the sea-berth helps keep a resting sailor in their berth instead of falling onto the floor.  Monohull boats have gimbaled stoves. Even while the boat is heeled over, the galley stove will remain level. However, cooking in a monohull while underway is still more challenging than cooking in a catamaran since the cook needs to constantly brace themselves against the heel and rolling motion.  At the same time, none of this is to say that catamaran sailors have it easier at sea. In reality, catamarans may be more level, but they feel every wave in the ocean twice. The result is a choppy, bumpy ride with no rhythm. It can be just as tiring as being heeled over in a monohull.   Catamaran vs Monohull Sailing Compared Here are just a few ways that catamarans differentiate themselves from monohulls as platforms for living aboard. Living space—quantity and quality Storage space and weight Budget—purchase and routine maintenance Maintenance Catamaran vs Monohull for Circumnavigation Docking and close-quarters maneuvering Catamarans have significantly larger and often more attractive living spaces. On the other hand, the living space on a monohull is usually small and can be dark due to small windows. A monohull’s cockpit tends to be small and focused on safety. Families are more likely to feel in each other’s way, and moving around while others are seated can be awkward. On a catamaran, the cockpit is likely to be large and social. Catamaran cockpits have large tables and lots of lounging space in the cockpit. Catamarans have large trampolines forward, which provides another comfortable, social lounging space that monohulls lack. Many catamarans also feature additional lounge space via the large cockpit roof.  The salon on a monohull is located in the main cabin. A monohull’s salon will be smaller than a similarly-sized catamaran. Often there is a small table, room for several people to sit, and a single sleeping berth.  Catamarans feature a wide bridge deck that crosses both hulls. This large living area features great visibility, ventilation, and natural light. On some catamarans, the galley is located on the bridge deck (called “galley up”), and on others, the galley is located in one of the hulls (called “galley down”).  Monohulls have sleeping quarters in the bow and stern of the boat. On smaller monohulls, the main sleeping area is usually a v-berth. Older, smaller monohulls usually have just one head.  On a catamaran, the sleeping quarters are located in each hull. These cabins often feature regular-sized boat beds and large en-suite heads. Cabins on a catamaran usually offer more privacy than monohulls.  Catamarans are popular with charter companies because large families or groups of friends can enjoy living on a boat together in style and comfort. Each will have a private cabin and a private head. In addition, if you want to find space to exercise, do yoga, or watersports, you’ll find these activities much easier and more comfortable on a catamaran.  Catamarans have more space in general and certainly have more storage space. The additional deck space catamaran designs offer lends to easy storage for larger items, such as paddleboards and kayaks. Catamarans can often hoist and store larger dinghies than monohulls can. Large compartments make storage easy.  However, many catamaran owners are very cautious about storing too much. Additional weight can slow down a catamaran’s performance speeds. With so much space to put things in, it’s remarkably easy to overload a cruising catamaran. Many owners complain about the performance of smaller cats, when in reality they are often just badly overloaded. Monohulls have less space and less storage. Finding space for big items like water toys can be challenging. But monohullers worry less about weight and freely carry around their cast iron skillet collections—because weight doesn’t impact performance on a monohull nearly as much.  This is a consideration when cruisers consider adding additional equipment. For example, a catamaran owner will have to consider the added weight of a generator and its detriment to sailing speed. In contrast, a monohull owner will have to consider finding space for the new generator.  Some prefer the motion of a monohull while sailing. Monohulls heel over but are steady, and sailors usually get used to the heeling motion. On a catamaran, if conditions are good, the boat won’t heel and will provide a comfortable ride.  When sailing upwind, some catamarans experience bridge deck slamming. Waves get caught between the two hulls and create a slamming motion and sound. It’s hard to predict the timing and strength of each slamming motion, so some catamaran sailors can find it tiresome.  The amount of bridge deck slam varies from boat to boat. Catamarans with higher bridge decks will experience less slamming, while boats with bridge decks closer to the water experience more.  Beyond that often-discussed issue, there is also the issue of the boat’s motion. It’s very difficult to imagine how different the motions are when compared to one another. The monohulls slice through the waves, usually with a predictable rhythm. A catamaran, built lightly to sail fast, feels more like it bounces over the tops of waves. The crew will feel each impact as each hull hits each wave. The result is a choppy, unpredictable motion—but it’s generally flat and level. Monohulls have been around for ages. Therefore, sailors just starting out can find inexpensive, older monohulls. If you have a tight budget, you’ll probably start looking for a monohull. Catamarans are newer to the market. Therefore, the initial purchase price of a catamaran is likely to be higher. Monohull buyers can often find a used, well-equipped, comfortable monohull for less than $100,000. Catamaran buyers usually spend upwards of $250,000 for a used cruising catamaran.  Because monohulls have been produced for so long, there is much more supply. The catamaran’s more modern pedigree means that there are always fewer catamarans on the market than monohulls. As more and more customers are drawn to the attractive living space and stable sailing offered by catamarans, demand keeps going up, while supply remains low. Besides the higher up-front costs, catamarans are more expensive to keep and maintain. A monohull usually just has one engine. A monohull might have one head (bathroom) and will generally have less equipment. Monohulls have less space and storage, after all. Catamarans have twin engines, multiple heads, more hatches—more everything.  With more equipment, catamarans have higher maintenance costs. When a monohull owner services their engine, they have just one engine. A catamaran owner will need to service twin engines. Furthermore, each hull on a catamaran usually has separate and independent systems like bilge pumps, plumbing, fuel, water tanks, holding tanks…the list goes on.  A monohull owner will paint one hull bottom and wax only one hull. A catamaran owner will do everything twice. Therefore, the effort and cost of maintenance are often doubled on a catamaran.  Not only does it cost more money, it can also be harder to accomplish maintenance on a catamaran. You see, catamaran owners have fewer options to haul out. Most older boatyards have travel lifts that only accommodate boats up to 18 or 20 feet wide. Therefore, catamarans need to find a boatyard that has a large enough travel lift or a trailer to haul them. Because there is less supply and more demand for these larger travel lifts, the cost of hauling out a catamaran is often higher.  While some monohulls have lifting or swing keels and can reduce their draft, most catamarans have a shallow draft. This allows them greater flexibility while choosing anchorages. Even if a catamaran and monohull boat choose the same anchorage, the catamaran can get closer to shore and get better wind protection.  One final big difference between these two types of vessels is their ability to maneuver in tight spaces. Monohull sailboats are notoriously difficult to maneuver around docks and marinas. They often have poor visibility from the helm and difficult handling, especially in reverse. The single-engine design often requires a bow thruster, even on smaller boats.  The contrast that catamarans offer is pretty stunning. Even though they appear massive and ungainly in comparison, their twin engines mounted far outboard enable them to spin in their own length. Catamarans can be maneuvered in pretty much any direction using only differential thrust from the engines–all without a bow thruster. Safety Considerations — Are Cruising Catamarans Safe? Since most people have only limited experience with these vessels, many people wonder are catamarans safe. Even though they have been making large cruising cats for decades now, most of us have only really played on Hobie cats at the beach. And if there’s one thing we know about Hobie cats, it’s that they’re a lot of fun until you flip it over! Here’s a look at a few safety considerations and how catamarans stack up against monohulls.  Catamaran stability — capsize potential  Hull breaches and sinking risk Rigging failures Designing for speed Redundancy on board So, can you capsize a cruising catamaran? The answer is yes, no matter what the fanboys and girls say. It is technically possible but highly unlikely. Cruising cats are massive, and in all likelihood, you’re more likely to break the rigging than flip the boat. But in rough seas and extreme conditions, it does happen even on modern catamarans. If a monohull encounters strong winds and rough weather, it will heel and roll significantly—but it will keep righting itself. In dire conditions, the vessel could suffer a knockdown. But a monohull will always right itself after a roll—it has tens of thousands of pounds of heavy keel to ensure that it does. Of course, the rig and anything on deck will sustain serious damage in the process, but the boat will be upright in the end.  In the same scenario, while unlikely, a catamaran can capsize. And the catamaran will then remain capsized, with no possibility of righting itself.   One of the scariest risks at sea is that of a serious hull breach, one that a bilge pump couldn’t keep up with. For example, a boat could be holed by an errant floating object or suffer a stuffing box or through-hull failure. If a monohull sailboat is holed, it could sink straight to the bottom of the ocean. The crew would be left with only a liferaft and whatever they were able to recover before the sinking. But a catamaran is filled with foam and is (more or less) unsinkable. If a catamaran experienced a hull breach or capsizes, it would take on water and may become less habitable. However, it will still float. In many cases, not much of the boat is left above the water—but it’s still at the top of the water. Boaters may be able to perform emergency repairs and get the boat to port themselves. Or, they may have to stay with their vessel until help arrives. In either scenario, the crew maintains access to supplies and can stay with a much larger vessel, increasing the likelihood of being found and rescued.  Some catamaran sailors are so certain of their vessels floating in all scenarios that they don’t even carry a liferaft aboard. This is fool-hearty, to say the least, given the crazy and unpredictable things that can happen to any boat on the ocean. But one scenario is equally scary for the monohull or the catamaran sailor and should convince everyone that any offshore vessel should have a liferaft—the possibility of an uncontrollable fire. Rigging Safety When wind speed increases, a monohull will heel over. This heeling motion sheds the excess power of the wind. Monohull boaters should pay attention to the weather and reduce sail to ensure they aren’t overpowering the boat. This is why knowing how to reef a sail is so important for all sailors. However, on a catamaran, the sails and rigging take the increased load when wind speed increases. Catamarans don’t heel, and therefore, don’t shed excess power. If the weather becomes gusty and a catamaran has too much sail up, all that extra power is transferred to the sails and rigging. This can cause a dangerous situation. For example, there have been reports of catamarans being de-masted in sudden gusts of wind. In a worst-case scenario, a catamaran could capsize if they are over-canvassed when experiencing extreme wind conditions. Most monohulls have strong standing rigging. The forestay is connected to a solid structure, the hull. This means that the forestay has a strong, stable platform and gives a monohull better upwind performance. Monohulls also usually have backstays, which provide rigging redundancy. On a catamaran, the forestay is attached to a crossbeam. Because the platform is not as rigid as a monohull’s hull, the forestay is not as strong. In addition, catamarans usually don’t have backstays, and therefore have less rigging redundancy.  The configuration of the rigging is another rigging consideration. On a monohull, the spreaders and shrouds are perpendicular to the mast. Most catamarans come with fractional rigs that don’t have backstays, and their shrouds are set far back. Because of this configuration, catamaran sailors can’t let their mainsails out all the way on a downwind run because the shrouds are in the way. This leads to less efficient sail shapes when sailing downwind. However, catamaran sailors can rig their sails to sail wing-on-wing. While monohull sailors can also use this configuration with the help of a whisker pole, catamaran sailors have a nice, wide, stable platform to fly large downwind sails.  There’s no doubt about it–catamarans sail faster. Most articles and comparisons state that catamarans are about 20% faster than a similarly sized monohull. Catamarans have a lower wetted surface area and less drag than monohulls. They’re especially nice to sail in light winds, conditions that heavy cruising monohulls tend to not do well in. While most cruising cats can’t sail upwind as high as monohulls can, they still win the race. However, if a catamaran has daggerboards and a good sail inventory, it can point as well as a monohull.  Many boat owners believe that speed equals safety, as you might be able to outrun an impending storm. That’s a debatable strategy since weather systems often move faster than any cruising boat can move. It has a lot more to do with planning and the decisions made by the skipper, in the end.  Furthermore, more speed means a rougher ride. A heavy, full-keeled monohull might not move very fast, but the sea-kindly and forgiving ride means a more comfortable and better-rested crew. This only goes to illustrate that the “more speed” argument is far more of a personal preference than many sailors admit—especially when it comes to long-distance cruising. A faster boat provides a skipper with more options, but it does not ultimately equal inherent safety. That will always come down to the skipper and the crew, and the choices they make. A slow boat in the hands of an experienced and careful crew will always be safer than a fast racer under the command of an inexperienced and green crew. In other words, there is no replacement for seamanship and careful planning. Catamarans have two of everything. While this does equal double the cost and maintenance, it also provides redundancy. If a monohull’s single engine dies and there is no wind, they may have to call for a tow or wait for wind. If a catamaran’s left engine dies, sailors can just continue on the right engine.  Twenty years ago, the majority of boats completing circumnavigations were classic bluewater monohulls. Monohulls are considered safe and capable circumnavigators. But today, catamarans are establishing themselves as the more desirable choice for many circumnavigators. Catamarans are fast, stable, and capable of crossing oceans. In addition, catamarans can carry significant supplies and offer redundancies. Plus, the extra space that catamarans provide also means that the crew will enjoy watersports like diving, paddle boarding, and surfing.  Since nearly all traditional routes are downwind “milk runs,” catamarans naturally excel along the way. If you take a look at the competing boats for the World ARC rally for the last few years, a definite trend is growing. More catamarans compete every year. Common entrants include Lagoon 450s and Antares 44s. One of the most significant decision points when thinking about catamarans versus monohulls is your budget. If your budget is under $100,000, a monohull will be your best bet. If your budget is between $100,000 and $250,000, you can consider a smaller, older catamaran. Catamarans such as PDQs, Prouts, and Geminis will be in your budget. If you have a budget of over $250,000 and can afford higher dockage and maintenance costs, you can consider a catamaran. Next, consider your comfort level. To try it out, you might want to charter both a monohull and a catamaran. Check out a sailing vacation in the BVI or with a company like Cruise Abaco. Taking classes at our local sailing school might also be helpful. https://cruiseabaco.com Many folks are attracted to the larger, more comfortable spaces of a catamaran. However, some people feel more seasick on a catamaran and can’t get used to the motion.  So a lot of your decision will come down to personal preference.  If you can’t imagine squeezing into a darker, smaller cabin in a monohull, then a catamaran might be calling your name. On the other hand, if you are a traditionalist who loves heeling and boats with a lot of teak, a monohull might be your dream boat. It’s just impossible to know how a boat will make you feel until you’ve experienced both. Boaters often discuss the compromises involved in boat choices. Whether you choose a monohull or a catamaran, there will be some compromises involved. However, no matter which boat you choose, you can enjoy smooth sailing, beautiful anchorages, and some adventure along the way. Worried about getting caught in severe storm conditions in your boat ? Visit our guide! Which is better monohull or catamaran? Both monohulls and catamarans are popular choices for cruising sailors. Which one is better depends entirely on your personal preferences and which boat is more comfortable and appealing to you. If you are on a tight budget, a monohull is your best choice. On the other hand, if you love large open living spaces, a catamaran will be the better option. Which is safer catamaran or monohull? When wondering are catamarans safe, always remember that the primary determinant of the safety of a vessel is its captain, not the vessel itself. Both monohull sailboats and cruising cats have important limitations that their skippers must know and abide by.  Some consider catamarans safer because they are virtually unsinkable. If it has a hull breach or capsizes, it will still float.  Others see the sea-kindly monohull to be the safer bet, as they are better designed to protect their crews from the elements in severe weather. They also cannot capsize, as their ballast provides a righting moment in all conditions. But on the other hand, if a monohull experiences a hull breach, it can sink. Can catamarans handle rough seas? Modern cruising catamarans are built strong enough to cross oceans and survive in all kinds of conditions. It might be an uncomfortable ride, but not an unsafe ride. In the end, it is the skipper of the boat who ensures its safety at sea. Good seamanship makes a far bigger difference in how a boat handles rough seas than the design of the boat does.  In extreme conditions, such as hurricanes or sudden gusty winds, catamarans can capsize. Once a catamaran has capsized, it won’t right itself. However, it will still float, although upside down. Heavy seas are more likely to cause maintenance and chafing issues on both catamarans and monohulls. Matt has been boating around Florida for over 25 years in everything from small powerboats to large cruising catamarans. He currently lives aboard a 38-foot Cabo Rico sailboat with his wife Lucy and adventure dog Chelsea. Together, they cruise between winters in The Bahamas and summers in the Chesapeake Bay. Log in or Sign up You are using an out of date browser. It may not display this or other websites correctly. You should upgrade or use an alternative browser . Catamaran vs Trimaran Discussion in ' Multihulls ' started by Maciek188 , Jul 17, 2005 . creightonious New Member In all this talking of the advantages of great beam in multihulls, let's not forget the dirty little secret of tris (which configuration I favor): Once the windward ama is clear of the water, we are dealing with the tri's half-beam, not the overall beam. This accounts for the increased heel and the increased susceptability to wave-induced capsize. It also introduces a fairly powerful set of reasons to take a very serious look at Rob Denny's Harry Proa concept.   Doug Lord Guest tri vs cat I'm not sure I agree with that: the square or over square tri puts the CG furthest from the center of buoyancy(when mainhull is just clear) of any multihull and that's good for enormous power. Combine that with the banana boards in the ama's and a rudder t-foil and you have enormous power and the means to use it all with the least wetted surface and greatest pitch resistance. When all that power can't be used in light air you still have more power and less wetted surface than a cat. At least so far.... Rob Denney's innovations in proa's are extraordinary-I sure do agree with that.   rob denney Senior Member G'day, Thanks for the compliments. Tris are wider for structural reasons, but also because when it is time to tack, they only have half the width in the water. A square cat struggles to tack, particularly in waves. Proas don't tack so can be much wider than cats, possibly even than tris. There limit is diagonal stability, which could be augmented by foils (bit tricky as they have to work in both directions) or, my preference, a longer lee hull. Because there is nothing attached to the ends of the hull, this is neither expensive, nor draggy. I am currently building a proa for the 2008 solo Transpac (SF-Hawaii) which has the same sail area and weight as a 7m/26' Firebird cat. However, the proa is 7.3m/27' wide and 15m/50' long. Should be an interesting test of the above theory. regards, Rob   fast multi's Rob, would the windward hull of a racing harryproa still be the"heavy" hull as it is in the crusing version? And would it be designed to fly-just kissing the water-for minimum wetted surface and maximum power? I've gone oversquare on rc model foiler tri's with no negative effects on tacking with the lateral resistance disposed equally at the ama's-no main daggerboard. From that -and what you said(good point!)- I don't see any limitation on beam(except structural at some point) on your boats or tris -as long as diagonal stability/pitch stability are controlled.   G'day, Doug Lord said: ↑ Rob, would the windward hull of a racing harryproa still be the"heavy" hull as it is in the crusing version? And would it be designed to fly-just kissing the water-for minimum wetted surface and maximum power? Still the heavy one. On the solo boat, the windward hull which has me, all the safety gear, food and water etc in it, weighs 330 kgs, the lee hull 176 so it is considerably heavier percentasge wise. Doug Lord said: ↑ I've gone oversquare on rc model foiler tri's with no negative effects on tacking with the lateral resistance disposed equally at the ama's-no main daggerboard. From that -and what you said(good point!)- I don't see any limitation on beam(except structural at some point) on your boats or tris -as long as diagonal stability/pitch stability are controlled. Click to expand... ActionPotential Junior Member rob denney said: ↑ G'day, Doug Lord said: ↑ Rob, would the windward hull of a racing harryproa still be the"heavy" hull as it is in the crusing version? And would it be designed to fly-just kissing the water-for minimum wetted surface and maximum power? Still the heavy one. On the solo boat, the windward hull which has me, all the safety gear, food and water etc in it, weighs 330 kgs, the lee hull 176 so it is considerably heavier percentasge wise. Tris are more limited than harryproas in max width as their beams see a lot more load from the rig. They have more diagonal stability though due to hull shapes and crew aft. A proa with a canting beam solves this. We have a 10.5m/35' canting beam proa under way at the moment, will be interesting to see how it goes. regards, Rob Click to expand... rob denney said: ↑ G'day, Tris are more limited than harryproas in max width as their beams see a lot more load from the rig. Click to expand... ActionPotent said: G'day, Sounds great! Can you steer from the lee hull (to get the windward hull flying sooner) or do you have to stay in the windward hull? Click to expand... Vega Senior Member Hey guys, take a look (photos from "The Route du Rhum" 2006):   Attached Files: __bqpop01_640.jpg, __brossard03_640.jpg, __foncia-boat09_640.jpg, __groupama-boat10_640.jpg, gt12031006-168.jpg. Great photo's! No cats there. These are built to a rule and they can't build a competitive cat to that rule (they tried and failed). For the same money they can build a longer faster cat. Maybe they should alter the rule to allow 60' tris or 80' cats? When they built 60' cats tothe rule they were not competitive but were significantly cheaper.   brian eiland Senior Member Seahorse Article RMG said: ↑ (Attached is an article from seahorse written by Sebastien Schmidt on the Alinghi Catamaran that I got most of my information from.) Click to expand... some more 'Structured' Cats RMG said: ↑ After reading through the many posts I was surprised to see that nobody has brought up the Lake Leman multihulls used in the Bol d'Or regatta and other various lake events in Switzerland. Following the 2003 Bol d'Or, the Lake Class box rule, which limits overall length to 19.6 meters, waterline length to 12.5 meters, and height to 24.5 meters, was scrapped due to escalating costs and was replaced with the Decision 35 class, which was based off of the Alinghi Catamaran that dominated the scene from its launch in 2000 through 2003. Throughout the 1990s, trimarans won a majority of the lake regattas in Switzerland. Prior to the commission of the Alinghi Catamaran, Ernesto Bertarelli was sailing a yellow Gino Morrelli designed trimaran also named Alinghi. In 1999 Ernesto Bertarelli asked Sebastien Schmidt & Jo Richards, Gino Morrelli, and Van Peteghem & Lauriot Prevost to propose a new multihull design under the Lake Class box rule. The commission ended up going to Schmidt and Richards. What I found so interesting was Schmidt and Richard’s design process. They first started out by designing the most optimal sailplan that best suited the tricky winds of Lake Leman often ranging 360 degrees from 0-30 knots, without taking into consideration the rig, beams, or hulls. Computer tests were then run using the already designed sailplan on optimum tri and cat platforms. They found that in light air, the difference in wetted surface area favors the tri only if sailing on the central hull, which is not possible. The tri goes through an increase in wetted surface area until flying on one hull. To fly two hulls, the tri will be heeling at the very minimum of10 degrees. The wetted surface area of a cat only decreases with heel. The cat has a weight advantage of 400kg in this case, 1200kg compared to 1600kg. The cat only needs 3.5 degrees of heel to fly on one hull. What about righting moment? Obviously a tri is going to have much more righting moment than a cat. This was solved with 320 liters of water ballast and six crewmembers on racks. This extra weight is movable unlike on a tri. On this 1.2 ton boat, 23.7 tons of mast compression was calculated, similar to that of AC boats. An innovative carbon truss/tie rod structure was used to solve the compression and torsional deformation problems prone to cats. Two carbon trusses spaced 4 meters apart on the rear beam meet at the mast base and continue forward as a single truss to form the bowsprit. The structure looks like an upside down Y. A complex system of PBO rigging was used to support the trusses attached by tie rods. This catamaran was untouchable. None of the trimarans under the same rule came close to beating the Alinghi Catamaran. I think that this is a perfect example of how a catamaran platform is more optimal than a trimaran platform. It would be interesting to see this concept applied to larger racing catamarans. (Attached is an article from seahorse written by Sebastien Schmidt on the Alinghi Catamaran that I got most of my information from.) Click to expand... ThomD Senior Member Whille we are waiting, we have the Gougeon racing cat/tri supposed to make it on the water this summer according to the lattest issue of Epoxyworks. Always interesting to hear what blend of features Jan comes up with. I thought it might be G32 ish, with amas for greater stability in blasting mode, but I now don't think so.   Advertisement: oscarvan Junior Member Greetings....new around here and I see there's lots of reading to do, which is good as I have many hours to kill holed up in hotels on various continents. (Airline pilot). To me the Cat/Tri is the same discussion as the snow board/ski discussion. It's a different motion. I grew up on two boards, and never was able to change my mindset to a single board. I also grew up a mono huller. When I realized that carrying all that lead around (8300 pounds on my last boat) was pure insanity I saw the multihull light. So I went tri, because to me it's a mono hull. Minus the lead, just two floats for stability....LOTS of stability.... A cat is, again to me, a snow board.   Floating island - Trimaran or Catamaran? Catamaran vs. Trimaran Stability/most-stable - catamaran, trimaran, pentamaran? Tornado catamaran tilt trailers could one be adapted to carry a 14' beam trimaran? Build a catamaran, then convert it to a trimaran Catamaran vs Trimaran beam question RFQ - 6m catamaran hull shape Maxsurf Resistance Catamaran Extra Marstrom 32 and f40 catamaran hulls Light weight big open deck catamaran No, create an account now. Yes, my password is: Forgot your password? 267 COMMENTS Why Catamarans Capsize, A Scientific Explanation (For Beginners) The cat was 9 m long, and the owner had modified the boat by adding keels. The study consists of a data set of over 120 incidents reported, of which only 33 are catamarans showing that catamaran capsizing is something very uncommon. The reason for a catamaran sailboat capsizes; 28% Gust of wind. 28% Wind. Catamaran vs. Trimaran: The Differences Explained While trimarans do provide a decent degree of livability, they fall short of catamarans in two regards. First, they heel more than cats, making it difficult to do things like cooking on board. Second, they support much less load than catamarans. To put things into perspective, some 45 feet (14 meters). Comparing Trimarans & Catamarans Trimarans have greater beam than catamarans, making them considerably more resistant to capsize by wind alone, whether gusts or sustained wind. They heel sooner and more than catamaran, giving more warning that they are over powered. Waves are a different matter. The amas are generally much finer, designed for low resistance when sailing deeply ... Catamaran vs Trimaran: Choosing the Perfect Multihull Vessel When comparing trimaran vs. catamaran efficiency, the differences are minimal. Multi-hulled boats are more fuel-efficient than comparable mono-hulled boats due to their hull forms and their lighter weights. Multi-hulled boats also tend to have smaller displacement and shallower drafts than other boat styles. Trimaran vs catamaran A trimaran has a maximum righting moment of 27 degrees of heel, while a catamaran has a 12 degree one. Such a shorter angle can be reached in short seas, if the wind gusts are powerful enough and you haven't reefed. So capsizing a trimaran is extremely hard. Plus, if a trimaran flips over, it is virtually unsinkable, thanks to the three hulls. Battle of the Multihulls Catamaran vs Trimaran Performance. A trimaran usually has the forestay attached to the main hull. This provides a strong, stable, safe rigging platform. ... Can a trimaran capsize? All boats can capsize given extreme conditions. Many charter catamarans flipped when Hurricane Irma's 215 mph winds hit the British Virgin Islands in 2018. Trimaran vs Catamaran: What are the Differences? Catamarans vs trimarans surface: different living spaces. Catamarans have been taking the world's oceans by storm with their ever-expanding sizes and luxurious designs. ... In comparison, catamarans offer just 12° degrees protection against capsize - meaning that the trustworthiness offered by a trimaran is hard to match! ... Trimaran vs Catamaran It can reach speeds of up to forty knots, while the Catamaran can only reach about half that speed. Stability - The Trimaran is more stable than the Catamaran. This is because it has three hulls instead of two. This makes it less likely to capsize in rough seas. Space - The Catamaran is bigger than the Trimaran. Trimaran vs. Catamaran: What are the Differences? Trimaran vs. Catamaran: Stability and Performance The Trimaran stability made it famous. With three hulls, including one main and two overhanging, a trimaran is built for stability even in the roughest waters. In fact, it's nearly impossible for a trimaran to capsize, making it a safer option for the adventurous seafarer. Trimaran vs Catamarans (updated 2022) When catamarans heel, one of their hulls leaves the water resulting in a loss of stability and potential capsize. With a trimaran, the main hull remains in the water, with the leeward ama providing a predictable increase in righting moment and reliable stability ... Trimaran vs Catamaran - which to choose. We think given the extra stability ... Catamaran Vs Trimaran Catamaran Vs Trimaran. Gabriel Hannon. August 30, 2022. As boatbuilders make faster and more luxurious multi-hulls for cruising and racing, it is time to settle the debate: Catamarans vs. Trimarans. Catamarans and trimarans have distinct characteristics regarding comfort, sailing performance, safety, and personal preference. Trimaran vs. Catamaran: Which is Better? Catamarans are often considered better for sailing than trimarans for several reasons. They offer unparalleled stability with their twin-hull design. This makes them less prone to capsizing than trimarans. Its stability provides a safe and comfortable sailing experience, particularly in rough seas. Multihull Capsize Risk Check In addition, as a trimaran heels, the downward pressure of wind on the sail increases, increasing the risk of capsize. The initial heel on a trimaran is more than it is on catamarans, and all of that downward force pushes the ama even deeper in the water. Thus, like monohulls, it usually makes sense to keep heel moderate. Trimaran vs catamaran: Which one to go for A catamaran is a yacht with two hulls while a trimaran has three hulls. First of all, it is important to note that both trimarans and catamarans are more popular than monohulls lately as they are easier to control. In addition, monohulls can capsize more easily in difficult weather conditions, and sometimes, they even have space limitations. Can a Catamaran Capsize? The Surprising Answer A catamaran can capsize under extreme conditions, just like any other boat. Even the most stable catamaran can capsize if it's hit by a large wave, caught in a sudden gust of wind, or if the rotational force has overcome the stability of the boat. ... A catamaran is a type of multihull boat that has two parallel hulls connected by a deck or ... Trimaran VS Catamaran Most sailors will eventually have to debate Trimaran vs. catamaran with themselves. Some seasoned sailors swear that the difference between the two is ... However, this doesn't mean a trimaran can't capsize. In rough conditions, if a wave gets higher than half the size of the beam, the boat can flip over, but because trimarans have ... Capsizing Compare this with the risk of a car accident - 1 every 70,000 km in France, according to the Road Safety Department, or 1 every 7 years (the average mileage of a car being 10,000 km/year globally). So, a 0.017% risk of capsizing for a multihull every year, against 14% of having an accident on the road for a car, certainly raises a few questions ... Catamaran Sailing Part 7: capsize Catamaran Sailing Techniques Part 7: should the worst happen - with Nigel Irens. Capsize is very unlikely in most modern catamarans, but should the worst happen it is as well to be prepared ... Catamaran VS Trimaran As a cruising catamaran lifts a hull, the grip on the sea from its keel (either long low aspect ratio, or a daggerboard) is reduced, thus the boat tends to slide sideways. The heavier the cat, the more that this happens. On a tri, as it lifts up, the float digs in and provides the fulcrum for the capsize. Catamaran vs. Monohull: We Changed, Should You? 7. Shallow Draft Equals Better Anchorages. Catamarans have significantly shallower drafts than monohulls, allowing for safer anchorages closer to shore. Most catamarans in the 40-ft to 50-ft range draw between 3-ft to 4.5-ft, so they can anchor in places that a monohulls can not even consider. Catamarans Vs. Monohulls: Choosing The Right Boat Attach one line to each of the forward cleats and bring the loose ends to the center. Pick up the mooring with a boathook. String one line through the eye and bring it back to the same cleat. Repeat on the other side, keeping the lines the same length so the cat is centered. Monohulls or Catamarans One of the most significant decision points when thinking about catamarans versus monohulls is your budget. If your budget is under $100,000, a monohull will be your best bet. If your budget is between $100,000 and $250,000, you can consider a smaller, older catamaran. Catamarans such as PDQs, Prouts, and Geminis will be in your budget. Catamaran vs Trimaran This accounts for the increased heel and the increased susceptability to wave-induced capsize. It also introduces a fairly powerful set of reasons to take a very serious look at Rob Denny's Harry Proa concept. catamaran gulet motorboat riverboat sailboat trimaran yacht