catamaran hull on a boat

Catamarans: A Complete Guide to Multihull Boats

Catamarans have been a part of sailing history for centuries and continue to be popular for their stability, spaciousness, and performance. Developed by various cultures around the world, the principles of catamaran design have evolved over time to become optimized for both pleasure cruising and racing. This complete guide will help you understand the essentials of catamarans, their unique characteristics, and how to choose the right one for your needs.

From the basic concepts of multihull design, performance, and handling, we will explore the advantages and benefits of a catamaran in terms of safety and comfort on board.

Along the way, we will discuss maintenance considerations, distinctive catamaran brands and models, and how a catamaran lifestyle can compare to more traditional sailing options .

Finally, we will provide learning resources and frequently asked questions tailored to both seasoned sailors and newcomers to the world of catamarans.

Key Takeaways

• Catamarans are known for their stability, spaciousness, and performance
• This guide covers aspects like design, handling, safety, and choosing the right catamaran
• Resources and frequently asked questions provide additional insights for potential catamaran owners

Understanding Catamarans

Design Characteristics

Catamarans are known for their unique design, which features two parallel hulls connected by a deck. This design provides several advantages over traditional monohull boats, such as stability and speed.

With their wide beam, catamarans have a reduced risk of capsizing and can access shallow waters due to their shallow drafts 1 .

One of the notable aspects of a catamaran is its twin hulls, which offer increased living space and comfort compared to a monohull. Additionally, catamarans are often favored by recreational and competitive sailors for their excellent maneuverability 2 .

The materials used for constructing catamarans range from wood to fiberglass, and even aluminum for high-performance vessels. Aluminum catamarans are known for their strength, lightweight structure, and resistance to corrosion 3 .

Hulls and Construction

The hulls in a catamaran are crucial to its stability and performance. These hulls help distribute the weight evenly across the water surface, minimizing drag and allowing for smoother sailing.

In general, the hulls can be categorized into two types:

• Symmetrical Hulls : The hull shape is similar on both sides, which enhances balance and stability in various sailing conditions.
• Asymmetrical Hulls : One side of the hull is designed differently than the other, which can be advantageous when sailing upwind.

The construction materials used in building catamaran hulls also play a vital role in the boat's performance and durability. Common materials include:

• Fiberglass : A popular choice due to its lightweight, strength, and ease of maintenance.
• Wood : Traditional material that offers a classic look, but requires more maintenance than fiberglass or aluminum.
• Aluminum : Lightweight and strong, aluminum is an excellent choice for high-performance catamarans 4 .

Multihulls vs Monohulls

There's often a debate between the benefits of multihull boats, such as catamarans or trimarans, and monohull boats. Here are some key differences between the two:

• Stability : Due to their wide beam and reduced heeling, catamarans offer improved stability compared to monohulls. This makes them an attractive option for those who want to avoid seasickness or feel more comfortable on the water 5 .
• Speed : Multihull boats are known for their speed, which results from their ability to minimize drag and maintain a level sail.
• Living Space : Catamarans and other multihulls generally have more living space, as both the hulls and the connecting deck can be utilized for accommodation and storage.
• Maneuverability : While monohulls are known for their agility and ability to point close to the wind, catamarans can still offer exceptional maneuverability when properly sailed 6 .

Performance and Handling

Speed and Efficiency

Power catamarans have gained popularity for offering a unique combination of speed, efficiency, and stability. Their dual-hull design allows for less water resistance, which directly translates to higher speeds and better fuel efficiency compared to traditional monohull boats.

In addition, the wide beam provided by the two hulls ensures a stable ride even at higher speeds. This makes power catamarans ideal for cruising, fishing, and watersports ( Boating Beast ).

Sailing Dynamics

When it comes to sailing catamarans , the performance is affected by factors such as keel, rudders, mast, and sails.

Their wide beam and dual-hull design provide inherent stability and reduced heeling effect, making them less likely to capsize compared to monohulls.

I should also note that catamarans have a shallow draft, which gives them the ability to access shallow waters that may be off-limits to other boats ( Navigating the Waters ).

In my experience, the lighter weight of a catamaran and its aerodynamic design can contribute to remarkable sailing performance under different wind conditions.

The larger sail area relative to hull weight allows them to harness more wind power, further enhancing their speed and agility on the water.

Maneuvering and Docking

Maneuvering and docking a power catamaran involves understanding its unique handling characteristics.

The presence of two engines in separate hulls allows for more precise control in confined spaces such as marinas.

The maneuverability of these boats is typically improved by the use of dual rudders that are located close to each powered hull for efficient steering ( BoatUS ).

When docking under power, I find it helpful to carefully assess the wind and current conditions beforehand.

This is because catamarans can be more sensitive to windage due to their larger surface area above the waterline.

By understanding how these forces may affect the boat, I can make adjustments to my approach and successfully dock the catamaran without any incidents.

Safety and Comfort on Board

Safety Features

Safety is a top priority when sailing any type of vessel, including catamarans. A well-built catamaran offers several features aimed at ensuring the safety of those onboard.

First, catamarans have inherent stability due to their wide beam and twin hull design . This makes them less prone to capsizing than monohull boats. This stability allows me to confidently navigate various water conditions .

In addition to stability, catamarans are designed with positive buoyancy, making them almost unsinkable . Of course, safety equipment such as lifejackets, flares, and first aid kits should always be onboard and well-maintained.

Furthermore, you should also stay updated on weather conditions, avoid sailing in high-risk areas, and learn your boat's safe sail limits.

Living Spaces and Comfort

When it comes to living spaces, I value comfort and practicality as essential features for my time on the water. Catamarans offer a unique advantage in this regard, as their dual hulls create spacious living areas.

Most catamarans are designed with separate cabins in each hull, allowing for privacy and comfort when sleeping. Additionally, these boats typically feature shallow drafts , which means I can access shallow waters and anchor close to shore.

The main living area, or salon, is situated on the bridge deck between the hulls. It usually includes a seating area, a dining table, and a galley (kitchen). Large windows provide ample natural light and panoramic views, making the space feel open and bright. Some catamarans even have the option for an additional living area on the upper deck where you can enjoy the sun and breeze.

One aspect of catamaran living I truly appreciate is the ample storage available. Each cabin typically has built-in storage spaces for clothes, gear, and personal items. There are also designated areas for equipment such as spare sails, tools, and water toys. This makes it easy for me to keep my belongings organized and make the most of my time on the water.

Maintaining a Catamaran

Routine Maintenance

In order to keep my catamaran in the best possible shape, I make sure to perform routine maintenance tasks. These tasks are essential to extend the life of the components and ensure smooth sailing:

• Cleaning : Regularly cleaning the deck, hulls, and sails prevents buildup of dirt, algae, and other debris that could affect performance.
• Inspection : Periodically inspecting my catamaran allows me to detect any potential issues before they become significant problems. I pay close attention to the rigging, sails, and lines on my boat.
• Lubrication : Keeping all moving parts lubricated is vital to prevent friction and wear on components such as winches and pulleys.
• Antifouling : Applying antifouling paint to the hulls of my catamaran helps prevent the growth of marine organisms that can damage the boat and reduce its speed. Make sure to do this at least once a year.

Dealing with Wear and Tear

Despite my best efforts to keep my catamaran well-maintained, wear and tear is inevitable. Here's how I deal with common issues that could arise from regular use:

• Repairs : When I notice signs of wear on sails, lines, or rigging components, I make it a priority to repair or replace them promptly. Neglecting these issues can lead to more significant problems and affect the boat's performance.
• Hull maintenance : If I find dents, scratches, or stiff rudders on my catamaran's hulls, I address them immediately. Repairing any damage not only ensures smooth sailing but also prevents further issues from developing.
• Sail care : Over time, my sails can become stretched, torn, or damaged due to exposure to sun, wind, and saltwater. Regularly inspecting them for signs of wear and making any necessary repairs or replacements helps maintain optimal performance.
• Rust and corrosion prevention : Since my catamaran is made of various metal components, I need to protect them from rust and corrosion. I routinely check for signs of corrosion and apply anti-corrosive treatments when needed.

Catamaran Brands and Models

High-Performance Models

In recent years, there has been a growing interest in high-performance catamarans. I have seen a variety of brands and models that have impressed me with their performance capabilities. One notable brand is Fountaine Pajot , which has a long history of producing a range of sailing catamarans and power catamarans. Some of their popular models include the Tanna 47 and the Bali 4.4 .

Another high-performance catamaran I've come across is the Leopard 40 . Known for their speed and exceptional handling in various conditions, the Leopard brand started with sailing catamarans and has since expanded to include power catamarans. Their models range from 40 to 53 feet long, offering both power and luxury for those looking for a thrilling experience on the water.

Cruising Catamarans

When it comes to cruising catamarans, the Lagoon brand is synonymous with luxury and comfort. With a range of sailing catamarans from 40 to 70 feet long, Lagoon offers spacious catamarans for extended bluewater cruising. Their 60- and 70-foot power catamarans are equally impressive, providing ample living space and smooth sailing experiences.

I've also found the Aquila 42 PC to be a remarkable cruising catamaran. With a focus on design and innovation, Aquila has produced catamarans perfect for exploring the open sea with friends and family. Their spacious, stable designs allow for a more enjoyable and serene journey, ensuring you arrive at your destination comfortably.

The Catamaran Lifestyle

Anchoring and Cruising

I find catamarans to be a fantastic choice for cruising and anchoring , which is a critical part of living the catamaran lifestyle . Catamarans have several advantages when it comes to anchoring and cruising, such as:

• Stability : Due to their wide beam and twin hulls, catamarans remain stable during anchoring, which reduces the risk of seasickness.
• Shallow draft : Thanks to their shallow draft , catamarans can anchor close to shore, enabling better access to protected coves and more beautiful beaches.
• Speed : Despite their large size for cruising vessels , catamarans are generally faster than monohulls. This is a result of their slim hulls and reduced water resistance.

When it comes to anchoring, catamarans can make use of their shallow draft to anchor in locations that other boats cannot. This allows for a greater range of cruising spots, which makes the overall experience much more enjoyable and unique.

Living on a Catamaran Full-time

For many catamaran enthusiasts, the dream of living full-time on a catamaran is entirely possible. While not without challenges, there are several factors that make living aboard a catamaran an enjoyable experience:

• Spacious living areas : Catamarans generally have more living area compared to monohulls, providing ample space for the whole crew.
• Privacy : The separate hulls allow for private cabins, ensuring that everyone on board has their space.
• Stability : As mentioned earlier, catamarans are stable vessels, making living on them more comfortable than monohulls.

Choosing Your Catamaran

Comparing Models and Features

When I start to look for the perfect catamaran, the first thing I focus on is comparing various models and features .

I determine the key factors that are essential for my needs, such as size, passenger comfort, and performance. By doing so, I can identify which catamaran models are most suitable for me.

For example, if I plan to sail with a large group, I would look for a catamaran that offers ample space both inside and out.

To help me with my comparisons, I usually create a table or list of the different models and their features:

This visual aid makes it easier for me to sort the options and prioritize my considerations, such as price, yacht type, and brand.

New vs. Second-Hand

Another critical aspect of choosing a catamaran is deciding between a new or second-hand boat.

Both options have their pros and cons, and ultimately it depends on my preferences and budget.

If I can afford a new catamaran, I get the advantage of the latest design , features, and technology. Plus, I typically receive better warranty coverage and support from the manufacturer.

However, new catamarans are more expensive and can have long wait times due to high demand.

On the other hand, purchasing a second-hand catamaran can save me a significant amount of money, and I might find a high-quality boat with low mileage or well-maintained by the previous owner.

However, this option carries more risks, as I need to be knowledgeable about potential maintenance issues and conduct a thorough inspection before purchase.

Learning Resources

Books and Manuals

When it comes to learning about catamarans, there are plenty of books and manuals available.

One of the highly recommended books is Multihull Voyaging by Thomas Firth Jones. This book provides a comprehensive understanding of multihulls, including catamarans, and is an essential guide for any beginner sailor.

Another great book to check out is Catamarans: The Complete Guide for Cruising Sailors by Gregor Tarjan.

With a foreword by Charles K. Chiodi, publisher of Multihulls Magazine, this book covers all aspects of cruising catamarans. It includes detailed information on design, construction, and maintenance, as well as tips and tricks for sailing a catamaran.

Here are a few more books that I find valuable:

• The Catamaran Book by Tim Bartlett, an excellent resource for both beginners and experienced sailors
• Catamaran Sailing: From Start to Finish by Phil Berman and Lenny Rudow, a comprehensive guide to both catamaran racing and cruising

Online Content and Photography

In addition to books, you can find plenty of online content and photography about catamarans.

Websites like Sailaway Blog and Boating Guide offer tips, techniques, and how-to articles for sailing catamarans.

Many of these sites also include stunning photography, showcasing these beautiful vessels in action.

For those who prefer Kindle or e-books, many of these resources are available in digital format.

This makes it easier for you to access them anytime, anywhere, allowing you to keep learning and improving your catamaran sailing skills.

To further enhance your knowledge, you can also join online forums and communities dedicated to catamarans.

These platforms provide invaluable advice and first-hand experiences shared by fellow sailors, as well as recommendations for additional learning resources.

Frequently Asked Questions

What factors should be considered when choosing a catamaran for full-time living?

When choosing a catamaran for full-time living, consider its space and layout , as it will become your home.

Look for a design with a comfortable living area , ample storage, and sufficient berths for the number of people living aboard.

Also, consider fuel efficiency , ease of maintenance, and the catamaran's cruising range .

Lastly, the overall cost of ownership , including insurance and mooring fees, should be considered.

How do catamarans perform in rough sea conditions?

In general, catamarans are known for their stability, which is primarily due to their wide beams. This makes them less prone to capsizing when compared to monohulls.

However, their performance in rough sea conditions will depend on the specific model and design of the catamaran. Some may perform better in certain conditions than others, so researching and selecting the right design is essential.

What are the key differences between sailing a catamaran and a monohull?

One of the main differences between catamarans and monohulls is stability.

Catamarans have a wider beam , which makes them more stable and minimizes the risk of capsizing.

They also have shallower drafts, which allow them to access more shallow waters compared to monohulls.

Additionally, catamarans often have larger living spaces, making them more comfortable and suitable for cruising and full-time living.

What are the advantages of catamarans for long-distance cruising?

Catamarans offer several advantages for long-distance cruising.

Their wide, stable design provides a comfortable ride and reduces the risk of seasickness.

They can also attain higher speeds due to their reduced drag and generally sail faster than monohulls on certain points of sail.

The shallow draft allows them to explore more coastal areas and anchor closer to shore. Lastly, their spacious interiors make them ideal for extended cruises and living aboard.

How does one assess the value of a used catamaran on the market?

Assessing the value of a used catamaran requires thorough research and inspection.

Start by comparing the age, model, and condition of the catamaran to similar listings on the market.

Take note of any upgrades or additions made to the boat, as these can affect the price.

It's essential to inspect the boat in person or hire a professional surveyor to ensure there are no hidden issues that could affect its value.

What essential features should be looked for in a catamaran intended for ocean voyages?

For ocean voyages, look for a catamaran with a strong, well-built hull designed to handle rough conditions.

Safety features such as liferafts, adequate flotation, and sturdy deck hardware are crucial.

A reliable engine and well-maintained rigging and sails are also essential.

In terms of living space, opt for a catamaran with a comfortable, spacious interior and ample storage.

Last but not least, good navigation and communication systems are necessary for long-distance ocean voyages.

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Boat Hulls 101: Complete Guide to Boat Hull Types, Shapes, and Designs

Table of Contents

Last Updated on August 17, 2023 by Boatsetter Team

If you’re new to boating, then you may not have even considered a boat’s hull , its importance, and the way that it affects your time on the water. With the  hull  being the part of the boat in the water, it is perhaps the most important part as it gives your boat the ability to float. Not only that, but it affects every single characteristic of your boat and the smoothness of your ride. This article on boat hulls will equip you with the technical knowledge and expertise necessary to understand hulls and the way they work.

What is a Boat Hull?

First of all, we’ll go into a bit of detail on what a boat hull is. The hull is the body of the boat. It is sealed to prevent water from transmitting its way through and keeping your boat afloat. A hull can be open where you sit in it, such as a small dinghy, or a deck may cover it as you would find on a yacht.

When there is a deck placed on top of a hull, it opens up many more options for utilizing the space on your boat more appropriately as it is raised to the top of the hull, where more space is apparent. For example, on a deck, you can place a cabin -like you would find on a center console or even a mast and sail rigs to create a sailboat.

When the hull is open, options to use your space effectively are reduced as you sit at the bottom of the bowl shape. In addition to having less space, you also feel the rock of the water in a more pronounced manner as it is just the keel of the boat (the bottom) separating you from the water. Therefore, every wave and lurch in the water that rocks the boat is felt, which may cause you discomfort if you haven’t quite found your sea legs.

Why Are Hulls Important?

The knowledge of how a boat floats is fundamental if you are looking to get into boating. Without actually knowing, you put yourself at risk of compromising your boating activities and creating a danger that you cause your boat to sink. The key line to this knowledge is that the air encapsulating your boat must be denser than the water it sits upon. This not only includes the air but the items on your boat as they contribute towards the pressure that your boat’s hull puts upon the water.

The greater the amount of weight your boat holds, the further it pushes itself into the water, lowering or raising the level that your hull sits in the water. This force displaces the water to a level that is equal to the boat. If the average density of the boat is greater than the water, then the boat shall sink. You can see this in action if you have a small dinghy; the more people you place on it, you’ll notice that your boat edges itself ever so slightly more into the water as the boat’s weight is rising.

Different types of Boat Hulls

We’ll now walk you through the different types of boat hulls that you come across. The design of the boat’s hull changes the type of boat that you have. If you are browsing through our boat rentals, you’ll notice the various types of boats. Each of these boats has a different type of hull design. For example, a pontoon boat rental is designed for calm waters, whereas a giant yacht is designed for taking on the rough seas, meaning that their hulls vary greatly.

There are two main types of hull: displacement and planing. We’ll give you the rundown of both of these types and the other sub-varieties within them.

Displacement Hulls

The first variety of hulls that we shall examine are displacement hulls. These hulls are typically found on boats that need to carry a heavy load, such as a large fishing boat and big yachts. The hull sits deeper into the water, and the boat is supported by buoyancy, as opposed to its thrust.

Due to the boat sitting deeper in the water, it might be slower, but it will ride steadier. These larger boats are particularly good for the sea as they can handle stronger waves and currents as the boat can stabilize themselves better. This is why you’ll see container ships and other varieties that need to bear a heavy load using these types of hulls.

When it comes to boat rentals, you are most likely to find a sailing boat with a displacement boat hull. The hull is rounded at the bottom, allowing the sailboat to lurch strongly to one side while turning without any danger of capsizing. Thus, we can see the impact that the hull has on your boat rental as it gives your sailboat the extra capacity to lurch around sharp turns and enjoy some exhilarating fun.

Planing Hulls

The other main type of hull is the planing hull. This hull’s design allows the boat to accelerate to higher speeds due to less hull being placed in the water. When a boat with a planing hull is cruising at lower speeds, it operates similarly to a boat with a displacement. When it starts to hit around 15 knots, things start to change depending on the weight of the boat’s load. The flatter surface of the planing hull allows the boat to propel itself upwards to skiff itself across the water. This is what causes boats with planing hulls to obtain higher speeds. In addition, because the bulk of the hull is not placed below the water’s surface, there is less tension from the water holding the boat back, meaning that it can move through the water faster and using less power to obtain a speed that a boat with a displacement hull can.

There is not only one type of planing hull but instead many different varieties. We’ll look through these varieties to examine how it affects your boating experience so that you can make a more informed decision when choosing your next boat rental.

Flat Bottomed Hulls

As the name suggests, these hulls do not have the traditional curved hull that reaches a point at the bottom but has a flat surface instead. These tend to be small skiffs or fishing boats where you cast out from. Due to them having a flat hull, they are excellent for getting into shallow water where some of your favorite catches may lie. These boats don’t need much power for the planing power to come into action and reach quick speeds in no time. They also tend to handle well not just on the flats but also on the sea, with choppy water not being a big issue. So, if you’re looking for some gentle fishing on the flats or maybe out in some nearshore waters, check out our range of small flat bottomed hull boats to truly enjoy some great fishing experiences.

Pontoons  are one of the great boat rentals for cruising around and enjoying time with friends because the design of their hulls allows for more space to be created. Pontoons have two-cylinder hulls that sit parallel to each other on the surface of the water. The deck is placed atop these two cylinders, and because they are placed on cylinders, the deck can expand beyond the cylinders, creating more space. This allows for a comfortable seating/social area to be created on the boat, allowing you to use it for parties and some relaxed exploring with the wider family. These boats are best used on inland and flat waters. This is due to waves rocking them a lot more, and a storm at sea can even put them at risk of capsizing. For some fun on a lake, however, pontoons are hard to beat.

In recent years many tritoons have started to crop up on the boat rental market. These are similar to pontoons, but they have a third cylinder that gives them some extra stability. It also means that they can handle a more powerful engine that can bring them up to higher speeds than a pontoon boat. If a pontoon has an engine that is too powerful, then its planing hull can lift it too far above the water’s surface, causing great instability. However, when it comes to tritoons, the greater speeds that you can reach allow you to expand upon other activities and add in some wakeboarding or tubing action onto your party on the water!

V Bottom Hull

The shape of a v bottom hull has a sharper decline that accumulates in having a meeting point at the bottom, creating a v shape, as stated in the name. Because of the honed hull, one of these boats can cut through the water at decent speeds and are particularly good when out on seawater. However, they require a powerful engine for the boat to go into a planing mode. One of the most common types of v bottom hull boat rentals is center consoles. These are great vessels for going for some nearshore or offshore fishing or some general saltwater exploring. Their v bottom hull allows them to cut through the waves so that you can rush to the best fishing grounds in no time at all.

The tri-hull design is a variation of the v bottom hull. It has a v-shaped hull in the center and two parallel smaller hulls on either side of the main central one. This gives the tri-hull boat some extra stability when going forward . Additionally, this also allows the boat to have more deck space as the hull covers a wider range. One of the big drawbacks of the tri-hull – also known as a cathedral hull – is that the bat rocks more when it is in choppier water because the hull is wider. Nevertheless, tri-hulls make for a great option for fishing or exploring on lakes or calm coves.

Catamaran: A Multi-Hulled Boat

Perhaps the most popular multi-hulled boat is the catamaran. This type of boat has two separate hulls that run parallel to each other. These hulls sit on either side of the boat and the deck connects them. This type of design allows forecast amounts of space onboard . Many catamarans are luxury boats that can have the space to hold swimming pools and even helipads. Because they have dual hulls, catamarans can get themselves in shallow waters and lagoons where other luxury boats cannot. This makes them the perfect boat rental if you plan to visit a location where there are multiple small islands such as Hawaii or The Bahamas. The multi-hull system also provides a lot more stability and comfort, so they are perfect boat rentals if you are prone to suffering from seasickness . Catamarans are not only luxury liners as smaller versions with a trampoline-designed deck can also be found that make for great day adventures.

As we hope you have been able to discover in this blog post, the type of hull that your boat has affects everything about your boat. By having a little bit of knowledge on how the design of a boat’s hull has an impact on your boating experience, you can begin to make more informed decisions on which boat rental is best for you. To reinforce this information a little bit further, check out this  video !

Boatsetter empowers people to explore with confidence by showing them a world of possibility on the water. Rent  a boat,  list  your boat, or become a  Boatsetter captain  today.

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performance, yet desire high daily averages and passage times, which should be as short as possible. When choosing a large multihull, sailors look, above all else, for safety and comfort, long before the consideration for flat-out speed comes into the discussion. Nevertheless, performance is a highly important design consideration. No catamaran sailor wants to sail slower than a same length ballasted keelboat. Below are some EVALUATION & COEFFICIENTS useful coefficients, which will help compare monohulls and multihulls objectively.

Bruce Number (BN)

below "Indigo," a magnificent Wormwood 70, sailing in sparkling Caribbean waters.

Various multihull characteristics and design features can be expressed in mathematical formulas. Their results are crucial and will give prospective owners a basis of comparison between different types of catamarans. These numbers are important, as they eliminate ambiguity and clearly display various advantages or concessions of a design, which would be hard to quantify any other way. Mathematical coefficients not only will provide insight into a boat's performance in varying conditions, they also reflect concerns about loads to be carried safely, speed and stability.

We have already mentioned the Displacement/Length and Sail Area/ Displacement ratio in our chapter on Multihull Advantages, illustrating the point of a multihull's efficiency. Let's look at some other coefficients that give us an indication of a boat's performance.

What is performance and how do we really measure it? Most people who buy a cruising catamaran are not really interested in racing

The Bruce Number is very similar to the Sail Area to Displacement ratio although the formula is slightly different. It is the square root of the sail area in feet, divided by the cube root of the boat's displacement in pounds:

SA = upwind sail area (mainsail and 100% jib)

Displ = weight of the boat in pounds

Similar to the Sail Area to Displacement ratio, the higher the coefficient the faster the boat and better is its performance in light air. Typically a BN of 1.1 will be the threshold between fast and more sluggish multihulls. A heavy displacement monohull might have a BN of .7, whereas a modern cruising catamaran shows a BN of 1.3. Offshore multihull racers can have BNs of 2.0 and higher. The BN will also tell us about a catamaran's ability to withstand stronger winds before reefing. A boat with a higher BN is usually overcanvassed in strong conditions and will have to be reefed earlier than one with a lower coefficient.

On the other hand, they will be able to produce more "power" than their counterparts in lighter winds and perform better.

Sail Area to Wetted Surface (SAWS)

SA/WS = Sail Area Wetted Surface Coefficient

SA = upwind sail area

WS = total underwater surface area (hull and appendages)

This formula simply divides the upwind sail area of the boat (mainsail and 100% jib) by the wetted surface. This coefficient will give us a statistical indication of the multihull's lightair performance since in low wind conditions skin friction becomes an important factor. Monohulls can have coefficients of at least 7% more than multihulls.

Hull Fineness Ratio (HFR)

The Hull Fineness Ratio, known as the hull's beam-to-length ratio, is an interesting number. It is derived by simply dividing the waterline length of the hull by the waterline beam of the hull.

Max. WL/Max. Beam WL = Hull Fineness Ratio Max. WL = length of the hull at waterline in ft. Max. Beam WL = beam of the hull at the waterline in feet.

Monohulls, when compared to multihulls, have low hull/fineness ratios. In Part 1 of this

book, discussing "Efficiency," we saw that ballasted keelboats are limited to Archimedes' principle of hull speed (1.34 x VWL). Multihulls do not have these theoretical barriers, because their hulls are narrower.

The thinner the hull the faster it will be able to travel through the water. But, attention! It will also carry less unless you are on a mega cat. Typically, a 40' cruising catamaran's HFR will range from 8:1 to 10:1. Dennis Conner's above While sailing under spinnaker and experiencing virtually no roll at all, guests will always find a comfortable spot to relax on the foredeck, an impossibility on a monohull.

There are various methods of calculating the transverse stability of a catamaran. One of the simplest and most utilized techniques is establishing a relationship between the height of the Center of Effort (CE), displacement, beam and sail area. Multihull designer, James Wharram added safety factors of 20% to compensate for gusts and the dynamic environment of the ocean. Another method is described in the text below.

Multihull Stability & Capsizing Moment d - Displacement (kg) x half beam (m) max ~ Sail Area (sq m) x Height of Center of Effort (m)

P max = maximum pressure exerted onto sails

Multihull Stability & Capsizing Moment

height of sailplan CE

half overall beam (half hull beam)

racing cat "Stars and Stripes" had a 16:1 HFR. Of course, the larger the boat, the narrower the hulls will become in comparison to its length. For example, the HFR of a 100' luxury catamaran may be 12:1, providing it with a high speed potential. However, monohulls can show HFRs of 3:1, though the comparison is complicated as their angle of heel affects the measurement.

One has to be very careful when analyzing the Hull Fineness Ratio of a cruising catamaran, because other factors such as the actual shape of the hull cross sections (Prismatic Coefficient, PC) can throw the analysis off balance. Go-fast sailors like to think that fine hulls are always fast. That is not necessarily true because a slim hull could have a large underwater volume, thus slowing it down. Consequently, a wide waterline-beam hull could have less drag than a narrower one. It could have a shallow underbody (low PC), which would be beneficial to load carrying (Pounds Per Inch Immersion Number, PPI) and early surfing characteristics at speed.

Stability Coefficient (SC)

This mathematical formula has been devised by the distinguished catamaran designer and sailor James Wharram and his team. This coefficient analyzes a multihull's ability (in a static environment) to resist capsizing due to wind.

( 0.682 VW x (.5 Boa) ) x .555 = CW .00178 x SA x h

W = Wind speed, apparent, in mph CW = Critical Wind Speed to capsize in mph SA = upwind sail area in sq ft. h = height of Center of Effort (CE) of total sail area

Boa = Beam overall

This formula will tell us how much wind it will take to overturn our multihull. By instinct we will know that a catamaran with a wide stance and a conservative sail plan will be very stable offshore. The SC formula will inevitably illustrate that a wider beamed catamaran with a tall sail plan will be as resistant to wind induced capsize as a short-rigged, narrower boat. This is not so if one considers the chaotic environment of waves and the real world of heavy weather sailing. It is interesting to note that a wide beamed boat (regardless of the SC) is more resistant to capsize in seas due to the effects of a higher moment of inertia. In an open-ocean environment, which is everything but static, the SC formula has little meaning. Nevertheless, it serves as a good basis to evaluate stability as a factor of wind force.

below When the wind suddenly comes up, all that is needed is a couple of turns on the jib furler to quickly reduce the headsail size. The catamaran will hardly sail any slower, but feel more comfortable.

Wide hulls and a large overall beam will increase the overall righting moment of a catamaran. A word of caution: Excessive beam will reduce the fore and aft stability. Designers strive to compromise hull fineness ratios, place heavy weights towards the CG (Center of Gravity), and engineer hull and overall beam to achieve a seaworthy balance, which is safe, yet provides ample liveaboard accommodations.

Catamaran Stability Considerations

Diagonal Stability & Beam-to-Length Ratio (BLR)

Stability of a multihull, or the resistance to capsize, should be seen as three components. Athwartship Stability is one well-publicized type and the one often talked about. The other much more important types are Fore and Aft and Diagonal Stability. Fore and aft stability is established by the relationship between the boat's waterline length and the distance between the hull centerlines. It will reflect the catamaran's resistance to tripping. This relationship should be in the vicinity of 39% to 42%. For a seaworthy cruising multihull it is important maintain the proper ratio between length and beam, which, in turn, balances equal amounts of athwartship with diagonal stability. The goal should be to prevent the possibility of a sudden discrepancy of powers between fore and aft and sideways resistance. Most of today's multihulls keep these two component forces in equilibrium, making them extremely seakindly and safe.

Some early design multihulls were very narrow, partly due to the material limitations of that time. But things have changed. Contemporary composite construction allows designers to build wider boats without compromising stiffness. Production catamarans of today have a wide stance and have the benefit of greater safety margins in gusty wind conditions than their older cousins. Multihulls are sophisticated structures and true modern miracles. They provide a more comfortable ride and more interior room. Thanks to modern materials they weigh less and perform better than catamarans built only 10 years ago.

Some catamarans, especially production boats, which are very popular in the charter fleets, are growing wider by the year. The businesses who rent these beamy monsters adore them. Lots of room plus open decks are ideal for clients and the bigger (wider) the boat, the more paying guests can share the fees. But there certainly is a limit as to how wide is too wide. Extreme beam can be dangerous. It can lead to instability fore and aft and to excessive bridgedeck slamming, as the relative distance from the bridge deck to the water will decrease with an increase in width. A vessel with excessive beam might seem stable athwartships, but it will compromise overall stability.

We know that multihulls can, in extreme cases of seamanship error in wild storms, be thrown over from any side - front, back and beam-on. The best examples of this phenomenon are racing multihulls, especially Formula 1 trimarans, which have fine hulls for speed and huge sailplans to provide driving power. They are initially extremely stable athwartships (High Beam-to-Length Ratio), but have a tendency to become unstable fore and aft. They will surf down waves and reach a point where the power of the sails, and speed, will exceed the ability to keep the bows out of the water and the boat will pitchpole. This is the reason why catamaran designers usually draw their multihulls with a Beam-to-Length relationship of between 50% and 55%. The longer the vessel the lower that percentage becomes.

I am currently involved in the "Gemini" project, which presents an example. It very well might become the world's largest sailing catamaran. She will have an overall length of 145 feet, yet her beam will "only" be 54.4'.

Please, don't worry. "Gemini" will not be tender and tip over in the slightest breeze. On the contrary, this monster will be one of the most stable craft afloat, although the beam-to-length relationship is only 37%. The relatively low beam-to-length ratio also involves the fact that the boat would be too heavy and building costs would be prohibitive if she were to have a standard 52% BL relationship. Most importantly, could you imagine turning a 75-foot-wide boat?

above Asymmetric spinnakers on furlers are great inventions. They add instant sail area, yet can be doused in a matter of seconds when the wind picks up strength.

above Although this Edel 35 was a good-looking and popular catamaran, it suffered from excessive bridgedeck pounding, which was caused by only several inches of clearance between the saloon's underwing and the sea.

Obviously there is a sweet spot in the beam vs. stability question. Designing too beamy a boat will also necessitate more freeboard to preserve bridgedeck clearance which, in turn, will increase windage and complicate maneuvering. Unless sophisticated aramid construction methods are utilized, more beam will also add more weight and stress to the structure. Adding more mass will, to a certain point, help make the boat more stable, but where do we stop? Is it better to add weight or width to make a boat stiffer? Of course, both characteristics are interrelated as a beamier boat normally is also heavier. Just adding weight to a catamaran simply to make her more stable will not pay off. Consequently, making a boat too wide might increase living space yet it will also burden the structure, require a beefier manufacture, and yield an even heavier boat. Needless to say, a boat which is too wide will also create practical restrictions such as maneuvering, the ability to haul the vessel and much higher building costs.

Beam has a great effect on bridgedeck clearance, which is one of the most vital characteristics of a good cruising catamaran. As standard practice, the well-known rule of 1" of bridgedeck clearance for each foot of beam was a safe way to prevent excessive wave slap. The wider the beam the more the relationship changes and the necessary height of 1" per foot of beam needs to be increased to 1.3" or more. In the extreme case of overly square boats, that number will have to be closer to 1.8" per foot of beam. This will have a negative effect on any seaworthy multihull that has a bridgedeck saloon. The wide beam will necessitate a high cabin sole to remain a safe distance from the waterline. In order to provide standing headroom, the coachroof might be higher than practical, which could result in a boxy, high-windage multihull. Not only will this be unattractive, but also raise the Center of Gravity (CG) which really should be kept as low as possible.

More overall beam on the other hand (given that there is still sufficient bridgedeck height) has a less known benefit, as it reduces the possibility of hull-wave interference, which is particularly important for fast designs. The wave interaction between the hulls can lead to additional resistance, and especially in an agitated sea state, the formation of wave crests can pound the bridge deck. Most early narrow-beamed catamarans suffered from this phenomenon,

Ultimately, a boat's design has a major influence on its ability to stand against the forces of nature, and to keep occupants safe. Manufacturing excessively wide catamarans is like trying to market monohulls with super deep-draft keels. Both are totally impractical. We designers have to make sensible compromises and learn from past experiences of what has worked at sea by balancing the benefits of a wide boat with its disadvantages.

below This narrow-hulled Outremer 64 Light has completed her third circumnavigation with the same owners. Note the smooth underwing clearance, lacking any protrusions or steps.

"A great cape, for us, can't be expressed in latitude and longitude alone. A great cape has a soul, with very soft, very violent shadows and colors. A soul as smooth as a child's, and as hard as a criminal's. And that is why we go!"

~ Bernard Moitessier

Dinghies, windsurfers and every imaginable type of water toy can be stored conveniently on large catamarans and easily launched from the wide transom steps for shore-side pleasures. Note the twin life rafts located in special compartments on the massive aft crossbeam.

Continue reading here: Hull

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Readers' Questions

What length should a stub keel be to waterline length on a catamaran?

There is no set rule for the length of a stub keel on a catamaran in relation to its waterline length. The length of the stub keel will depend on various factors, such as the size and design of the catamaran, intended use, and specific requirements of the boat builder. Generally, the stub keel on a catamaran is designed to provide stability and improve sailing performance, so it is important to consult with a naval architect or boat designer to determine the appropriate length for a specific catamaran.

What is a 16 passenger catarmarn like?

A 16-passenger catamaran is a type of boat or vessel specifically designed to carry 16 people comfortably. Catamarans are multihull boats with two parallel hulls, which are connected by a deck or a structure. They offer stability, speed, and efficiency in the water. A 16-passenger catamaran can vary in size and design, but generally, it will have enough seating or lounge areas for all passengers. It may have indoor cabins with beds or seating areas, as well as outdoor spaces for relaxation or socializing. These boats often come equipped with amenities such as bathrooms, kitchens or galleys for meals, and sometimes even entertainment systems. The catamaran's size can influence its specific features. Some catamarans are designed for day trips or shorter excursions, while others are built for longer journeys or overnight accommodations. Additionally, they can be used for various purposes, such as whale watching, diving trips, ferry services, or private charters. Overall, a 16-passenger catamaran provides a comfortable and stable platform for small groups or gatherings, allowing passengers to enjoy the beauty of the water while ensuring safety and comfort.

Is the catamaran hull floor always on the waterline?

No, the hull floor of a catamaran is not always on the waterline. The design of a catamaran allows for the hulls to be elevated above the waterline, reducing drag and increasing speed. The position of the hulls in relation to the waterline can vary depending on factors such as the weight distribution, load, and sailing conditions.

How close to a catamarans design reefing points should you go?

You should always be careful when approaching reefing points on a catamaran and stay as far away as possible. Generally, you should aim to stay at least 10 meters away.

What keel to length ratio for catamarans?

The keel-to-length ratio for catamarans typically ranges from 0.1 to 0.25.

Is 70% length to beam ok for a catAMARAN?

Yes, it is generally accepted that a catamaran should have a length to beam ratio of between approximately 6:1 and 8:1. Therefore, a 70% length to beam ratio would be within an acceptable range.

What is the waterline length to baem ratio of a typical cruising catamarans?

This ratio will vary depending on the type and size of the catamaran. Generally, the ratio should be between 1:1.5 and 1:2.5, with 1:2 being the most common.

A Complete Catamaran Guide

• Post Written By: Boater Jer
• Published: January 26, 2020
• Updated: November 27, 2020

Disclaimer: You might notice that we recommend products in some articles. We may earn a commission for referring you if you click the link and buy a product.

We only recommend products we’ve tried/tested/own (that’s why you won’t find thousands of affiliate links on my site). If you have experience with one of the products we’ve mentioned, please share your experiences in the comments at the end.

There you are, out on the water when a strange craft approaches.  Is it a sailboat? It sure looks like one until it turns to face you.  That’s when you notice this boat doesn’t have just one hull. It has two hulls and it’s called a catamaran.

Catamarans are unique, and highly stable watercraft.  We’ll explore all the ins and outs of sailing the waters in one of these weird, and awesome multi-hulled craft.  Join me as we explore the wild world of sailing catamarans.

A History Of The Catamaran

It is believed that the first people to use a catamaran design were those living in Australasia.

The succession of boat design in this region was actually very interesting.  The beginning of boats in the area was simple, albeit conventional rafts. These were fashioned from logs strewn together with plant fiber lashings such as those formed using bamboo fiber.  

Catamaran Evolution

The conventional raft gave way to a minimal raft.  This design was basically a conventional raft with two cross beams added in the form of logs.  These would be eventually hollowed out to improve buoyancy.

The next step in the evolution of boats in the Australasian region was the double canoe.  This proved to be the first real catamarans.  

After some time, the form evolved further into the asymmetrical double canoe design.  In this design, one canoe was large and the other attached canoe was smaller.

The asymmetrical design quickly evolved into the single-outrigger boat like the one shown in the photo below.

The final stage of the evolution of the catamaran in the region was to gain a second outrigger.  This in effect created the trimaran with the single central hull and dual outriggers.

Eye Witness Accounts Of Catamarans

In 1697, William Dampier wrote of witnessing a type of seafaring vessel off the coast of Coromandel.  He noted how the locals called the type of boat a catamaran. He also noted that it had multiple hulls (logs) and that they were small vessels that the person operating would have to hang partway into the water, straddling the hull (log).

The name catamaran came from the Tamil.  And yet, it was easily applied by the European visitors to the two hulled sailing vessels that sped across the water in the region.

Although Dampier may have described the catamaran in the 1690s, the type of boat was actually used as early as the 5th century by the Tamil Chola dynasty.  They used boats to move their troops from one island to another. Using this design of boat allowed them to travel heavy, travel quickly and was partially responsible for the conquering of neighboring Burma, Malaysia, and Indonesia.

Building A Boat – Basics Of Catamaran Construction

A boat is usually thought of as being a single-hulled vessel that travels along the surface of the water.  It can have multiple types, shapes, and designs of the hull. However, it is often only thought of as having a single hull.  But, what if it had two hulls? Would that be like taking two separate boats, and making a raft over both of them? In essence, that is exactly what a catamaran is:  two boats made into one.

Advantages Of Multiple Hulls

• More stability than a monohull
• Wide supporting base allows for larger sails than monohull craft of the same length
• Hull does not require the deep-running keel of a standard monohull sailboat
• Less hull drag in the water than a monohull
• Less power required to drive a catamaran forward than a monohull boat

Disadvantages Of Multiple Hulls 

• Due to multiple hulls, construction is more expensive than a monohull design
• Catamaran speed relies on lightweight materials to make a lightweight craft.  This also drives up the cost of construction.
• Extra engineering requirements for multi-hull craft also increase the cost of construction.

Conclusion?  Well, it looks to me like everything about catamarans points towards superiority over monohulls in nearly every way.  But, you get what you pay for. I think the same thing likely applies to cars too. For instance, I have a performance car that cost me about 10k more than the equivalent non-sports car within the same class. 

Yet to drive the vehicle, it performs so much better than the normal version of the car, it really speaks volumes to the difference between a common vehicle, and a performance one.

Speaking of performance vehicles, let’s take a look now at the different kinds and uses of a catamaran.

Catamaran Types

Commercial catamarans – ferries.

One of the most common uses for a catamaran is the commercial use of the vehicle design when it comes to ferries.  This is likely due to the wide, flat deck possibilities of a catamaran versus a monohulled boat. Not only that, but the catamaran is also a much more stable bodied vessel.  This again makes it a superior design for transporting larger land vessels like trucks and so forth. They can easily drive on the ferry without fear of the ferry tipping over.

Some ferries are designed for taking vehicles, like the one you might find in the city of Toronto.  Where it transports cars from the mainland to Toronto Island. Others are designed specifically with the sole purpose of transporting people. I took a look at one such ferry that operates in Germany.  Take a look at the following case study.

Commercial Use Case Study – The Ferry

The FRS Helgoline is a ferry catamaran operating out of Flensburg, Germany, close to the Danish border.

According to the ferry company’s website, the ferry runs using four main engines which are run to a capacity of 12,182 hp combined.  This blasts this ferry at a speed of 35 knots or 65 km/hour. This is equivalent to 40 miles per hour. That’s pretty good considering the size and weight of the ship body this catamaran can carry.

Speaking of capacity, the ship can carry 680 passengers. At 56.4 meters long (185 feet) by 14 meters wide (45.9 feet), that’s a decent passenger capacity. 

Catamaran Passenger Capacity Versus Monohull Boat Passenger Capacity 

The general rule for calculating passenger capacity for a boat is as follows.

Length x Width / 15 = Passenger Capacity

Therefore, the FRS Helgoline should have a calculated capacity calculated as follows.

185 x 45.9 / 15 = 566  

But it actually has a capacity of 680 which is a 20% increase in capacity over a standard monohull.

For comparison, let’s look at a superyacht.  A 48.5m (159 feet) long by 10.7m (35 feet) beam (width of the boat) Palmer Johnson Supersport 48 (valued at about $28.5 million dollars) should have a capacity calculated as follows.

159 x 35 / 15 = 371

In short, 26 feet of difference in length equates to 309 fewer passengers.  It is almost half of the capacity of the catamaran at 26 feet longer length.

Photo courtesy of https://sysyachtsales.com/

Commercial Catamarans – Service Vehicles

Although Catamarans are typically used as ferries due to their stability and ability to carry wide loads on their flat decks, there are many different service catamarans out there as well.  From a support vessel to a crew transfer or search and rescue, catamarans are a solid and stable platform to build a ship on.

This is the Ardea which is a 20 meter (65.6 feet) catamaran to be used for crew transport and as a support ship.  This ship was built by the Echo Marine Group and delivered to Western Australia in early 2019. This particular vessel is in the service of the Cape Preston Sino Iron Project.  

Catamarans are used all around the world, for a variety of tasks, not just ferries or support craft.

Commercial Catamarans – Cruise Lines

Now these are the catamarans we all want to be aboard, aren’t they?  Due to the wide stance, these ships can feature massive halls and wide-open interior areas.  These ships are stable, and some would say even more stable and safer than monohull design ships.  

There are many cruise ship catamarans in use today around the world.  Some of the more ‘famous’ catamaran cruises are those which investigate the Galapagos Islands.  There are several high-end, small fleet, cruise lines operating to the Galapagos which utilize catamaran design vessels as their primary ship type. 

These ships can be extremely comfortable and stable and often offer some reprieve to those who may otherwise feel seasick. It won’t stop the feeling, but the more stable the hull, the less the boat rocks around.

Military Catamarans

Catamarans make excellent military transport vessels.  They are stable and the potential to have a large, flat and wide deck for transporting land craft, troops or acting as a landing pad for vertical take-off aerial craft.  The stability of the two hulls makes the vessel an excellent candidate for military use, and thus it is used for said purpose.

As you can clearly see in the image of the USNS Spearhead, the rear of the vessel has a moveable ramp that can be used for loading and unloading land vehicles.  The interior bay of the craft is visible in the image as well, a large area for storage of vehicles, supplies and more. The crane arm on the back of the ship also shows how it is a versatile craft, set up to act as an excellent support craft with a helicopter landing pad and ample storage and freight capacity.

Recreational Catamarans

Catamaran Personal WatercraftThe wind is in your hair, the warm spray from the hull cutting over the edge of each wave as you skip over the water.  That is life, let me tell you. Personal watercraft have come a long way over the years and the small one, two, three and four-person catamarans have come a long way as well. 

Depending on the options, you can get a small one or two-person catamaran for as little as $1500 new.  That might be an inflatable though. There are some very nice, rigid hull designed catamarans for 1-4 people that range from $3500 to $15000.  And these are basically open, personal watercraft like that shown in the image below.

Using a small catamaran can be quite challenging to learn at first.  Sailing is not for the faint of heart. It requires skill, technique, knowledge of the wind and sea, and a bit of hard work.  But it can be fun, rewarding and a great way to catch some sun and fresh air out on the water. It’s a relatively GREEN sport as well.   Given the use of sails over gas-powered motors that is.

‘Sailing Cats’ – Sailing Catamarans – Yacht & Luxury Class

Here’s where we get into the dreamy boats of the rich and famous.  I priced out a small 43’ luxury Leopard 40 sailing catamaran. Even before I added any extras at all, the base price was $399,000 USD.  I imagine if I added a few of the multiple extras available, and some tax, freight and that sort of thing, I’m easily in half a million dollars.  And that’s the smallest base model.

There are all kinds of luxury catamaran shipbuilders across the world.  From Asia to Europe and The Americas, it seems any major boating country has at least one company building luxury catamarans.  It’s weird that you don’t see more of them on the water though, don’t you think?

Being sailing vessels, these luxury cats require some training in sailing before you get behind the wheel.  And considering the price point, I would definitely want to be at least a semi-decent sailor with some good few years experience under my belt before I would comfortable at the helm of a half-million-dollar sailing cat.  It’s all relative I suppose. I imagine a billionaire might bat an eye at the prospect of wrecking a half-million-dollar boat. But to me, and most of you reading this, that’s likely a lot of money.

‘Power Cats’ – Powered Catamarans

The powered catamaran is one of my favorite boats.  They have sort of a muscle car appearance with the wide and often tall front end of the boats.  I find it to be reminiscent of a large air intake on the front hood of a rally race car like the Subaru WRX, for instance.  These boats are fast, they are stable and handle very well. Catamarans are often considered the boat of choice for long sea voyages due to their stability.  

A powered catamaran will definitely cost more than a powered monohull boat of the same length.  Why? Well, the powered catamaran has one crucial downside. That is, it needs two engines. One for each of the two hulls.  Otherwise, it’s off balance for propulsion. These two engines or motors have to be in sync with each other or again, the propulsion will be off-balance.  Because they have two motors, they have double the maintenance when it comes to maintaining the propulsion system.

More components also means a greater chance of things breaking down.  In essence, it doubles the chances of the ship having a motor break down. The saving grace is that should one motor break, they have a backup, even if it does mean very unbalanced propulsion.  In contrast, a monohull vessel of the same length may only have half the chance of motor failure due to only having one motor, but if that one motor breaks, then what? Call for help, that’s what.  A cat would have a struggling chance to get itself back to port. A monohull would be dead in the water unless it was carrying spare parts or another motor onboard somewhere.

Catamaran Frequently Asked Questions

What is a catamaran cruise.

A catamaran cruise is simply a cruise on a dual hull design boat.  Often used for river cruises, the catamaran which is used as cruise ships are often considerably smaller than their giant monohulled counterparts.

What is the purpose of a catamaran?

A catamaran is a design for a boat that utilizes two hulls.  Due to the flat, platform-like-potential for the deck of the boat, the catamaran is often purposed with transporting materials, vehicles, and people.  For instance, catamarans are quite often used as ferries.

Is catamaran safe?

Catamaran are very safe water craft.   The design of riding on two hulls separated by a gap in between, in essence is like giving a car a double-wide wheel base.  The wider the stance, the more stable the craft, from side to side anyway. And if the length of the boat is proportional to the width, then it becomes an extremely stable craft.  That is why catamarans are often considered the best to be used for long voyages. Yes, catamaran are safe.

What is the difference between a catamaran and a sailboat?

A traditional sailboat is a deep, monohull vessel that has at least one mast extending high into the air above the deck to hold sails.  A catamaran refers to the design of a dual-hull boat and really has nothing to do with sails. Although, catamaran do make excellent sailing boats as well, they are quite capable of acting as power boats and do not require sails if they have the correct amount of powered motors to propel them.  Sailboats, although also able to be powered if a motor is provided, are traditionally monohull and wind-powered exclusively.

Do catamarans have small interiors?

The size of an interior cabin on a boat is typically proportional to the size of the boat itself.  If a catamaran has above-deck cabins, they will likely be able to be of a larger design than those you would find on deck of a monohull boat.  This is because a catamaran has a much wider footprint than a monohull boat of the same length. This extra width would allow for larger on deck cabins.  

How much does a catamaran cost?

A personal watercraft (1-2 person) inflatable catamaran will run you anywhere from $1500-$12000 USD, depending on the quality and features.  The rigid hull catamarans of the same size start at about $4500 USD.

A small cabin cruiser type of catamaran will typically start at about $60000 for a small base model and the price just goes up and up depending on size and features.

For Instance, a 40’, 3 cabin with 1 washroom cat will cost you about $500,000 USD for the base model.  They are considerably more expensive that a monohull of the same length. However, the trade-off is greater stability and a smoother, more comfortable ride.

Is a catamaran more work to maintain?

Technically yes.  Due to having two hulls and if powered, two motors and likely also water jets, this means you have double the oil changes of a boat that would have a single motor.  Once you get past the basic engine and hull maintenance, a catamaran is not that much more work than a monohull ship of the same length.  

The trouble with catamarans in terms of maintenance, is that once they reach a certain length, the width becomes more than a standard lane on the road.  That being said, if you ever need to transport the boat via land, it can be quite the challenge. Especially if you need to pay to have a police escort for an extra-wide trailer.  And special licensing might be involved as well.

What is the difference between a catamaran and a trimaran?

A catamaran is a dual hull boat.  In other words, it has two hulls. A trimaran has three hulls.  

Is a catamaran considered a yacht?

According to Oxford dictionary, a yacht is a medium-sized sailboat equipped for cruising or racing.  A catamaran, on the other hand, is a boat with two hulls. Therefore, a catamaran can most certainly also be a yacht.  And likewise, if a yacht has two hulls, then it is a catamaran as well.

Can you get seasick on a catamaran?

Seasickness occurs when a person feels nauseous from the swaying motion of a rocking ship.  These feelings may be lessened on a catamaran, due to their extra stability. However, a catamaran may be slightly more stable than a monohull of the same length, but it is still a boat.  And it will still make someone who experiences seasickness continue to feel the ill effects.

Are catamarans more stable in rough seas?

Catamarans are known to be more stable than monohull ships of the same length.  This is why catamarans are often the ship type of choice for long sea voyages due to their stability.

Why do catamarans capsize?

Catamarans are not known for capsizing.  The larger vessels that is anyway. But, it does happen from time to time.  Catamarans are known for their stability, so typically if a capsize event should occur, it is typical for them to be extreme circumstances.  

Personal watercraft catamarans are a different story though.  These are in fact known for tipping over. Not because they are less stable than their monohull counterparts of the same length.  But instead, because they are able to go considerably faster than monohull personal watercraft of the same length (not including powered craft though).  This is due to the sailing cats being able to have a larger sail than a small monohull sailboat of the same length.

Due to the extra sail, they are able to travel faster than monohull sailboats of the same length.  This allows them to whip around on the water and at higher speeds, whipping your cat about quick can easily send it over sideways. Extra speed means fast turns carry momentum in the direction of travel and that extra speed equates to tipping over if turned too fast.  To sum up, they capsize due to user error or extreme events.

Which is safer, a catamaran or a monohull?

Due to the extra stability of having a wider footprint than a monohull, a catamaran of the same length is the safer vessel.

Are catamarans safer than sailboats?

The same rule applies to stability versus the length of the hull.  A cat will always be the more stable length for length. However, due to their ability to go much faster than a monohull sailboat, this kind of cancels out some of the added safety due to stability.  With that in mind, they may just be about the same but there is one generalization we can make when comparing the safety of catamarans vs sailboats: At the same speed, and of equal length, sailing or power catamaran will be safer than a monohull sailboat.

How fast can catamarans go?

The speed a catamaran can go is entirely dependent upon the hull design, weight of the vessel, the strength of propulsion (be it wind or powered) and so on.  The general rule is that in terms of sailing cats vs monohull sailboats, a cat of equal length can typically go faster than a sailboat.  

In terms of powered cats vs powerboats, a powered catamaran will typically require less energy to move forward than a monohull of the same sort of hull design (but monohull of course) and thus a cat should, in theory, be able to go faster than a monohull when both are using propulsion that is equal in power.

Bibliography

• Wikipedia – Catamarans
• Mahdi, Waruno (1999). “The Dispersal of Austronesian boat forms in the Indian Ocean”. In Blench, Roger; Spriggs, Matthew (eds.). Archaeology and Language III: Artefacts languages, and texts . One World Archaeology. 34 . Routledge. pp. 144–179. ISBN 0415100542 .
• Wikipedia – Spearhead -class expeditionary fast transport
• https://www.tiki-toki.com/timeline/entry/169516/Origin-of-the-catamaran/#vars!panel=1620923!
• https://www.austal.com/ships/passenger-express-56
• https://www.adventure-life.com/galapagos/galapagos-catamaran-cruises

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Do Catamarans Have Bathrooms?

Heading out on the water for the weekend has its benefits, especially if you’re cruising in style on a catamaran. If you’re anything like me, you get excited about the adventure and sometimes forget to think of the obvious. Well, if you’re a man and you’re about to take your wife out on a catamaran for the first time, I bet one of the first questions she’ll ask is, ‘Does it have a washroom?”. And that is a perfectly reasonable question, especially if you intend to spend some decent time out on the water.

Boat Propeller Anti-Fouling Paint, Grease, And Awesome Tips

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When is a boat called a yacht? Let’s find out. The marine community interchangeably uses boats, ships, and yachts. Even though these watercraft mostly sound the same, there are distinct differences among the three. Boats can refer to watercraft ranging from personal vessels to something that can carry one or more passengers. Yachts sound more

Heading out to the lake? Well, there’s no better way to enjoy the day than from your pontoon boat. Imagine the fun you’ll have with family and friends cruising around in the sunshine. Even if you’re a novice, a pontoon boat is easy enough to maneuver.

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Catamaran Vs. Motor Yacht (4 Powerful Differences Explained)

The Catamaran Vs. motor yacht, a comparison that has lasted for ages, is one we will finally put to rest in this article. We promise to make spotting their differences easy.  Differences Distinguishing the Catamaran Vs. Motor Yacht At the end of this section, everything that distinguishes these two sailing boats from each other will

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What Is A Catamaran Sailboat? (And What It Looks Like)

Catamarans are increasingly popular for sailing and commercial use, but what sets them apart from monohulls and other multihulls?

A catamaran is a twin-hull boat with two equally-sized hulls placed side by side. They’re powered by engines, sails, or both—and they’re known for efficiency and speed. Catamarans are the most common kind of multihull boat.

In this article, we’ll go over the characteristics of catamarans and how to differentiate them from other types of boats. Additionally, we’ll cover the advantages and disadvantages of catamarans and compare them to trimarans and monohulls. We’ll also go over the most common types of catamarans and their uses.

We sourced the information in this article from marine design guides, boat identification resources, and the online boating community.

Table of contents

‍ How to Spot a Catamaran

Spotting a catamaran is easy. Simply look at the hulls and count them. Catamarans have two hulls side by side and a relatively large gap between them where you can see light on the other end. Catamarans are distinct from trimarans, which have an additional hull between the two outer hulls.

How do Catamarans Work?

The principle behind the catamaran is simple. You can think of catamarans like cars and monohulls like motorcycles. Catamarans distribute their weight between hulls on either side, whereas monohulls utilize only one hull.

Evidently, cars are much more difficult to tip over and can hold much more weight. Additionally, cars are wider, as they have much more contact with the road. Catamarans work in a similar way, as they have a wide stance and contact with the surface on both sides.

Obviously, that isn’t the most precise comparison. But the basic principle is the same, and catamarans have a few notable benefits over monohulls.

Catamaran Vs Monohull

Catamarans are easy to distinguish from monohulls. A monohull is just a regular old boat with a single hull. The vast majority of boats and ships are monohulls. Catamarans have two hulls, which are usually sleek and narrow.

Here are some comparisons of catamarans and monohulls, along with the advantages twin-hull designs have over most single hull types.

Benefits of Catamarans

Catamarans have numerous benefits. The first is speed. Catamarans produce less drag than monohulls and thus can achieve excessive speeds both under sail and power. They don’t need to plane like monohulls to achieve these high speeds, and they use less fuel.

Catamarans are also much more stable than monohulls. They have a wide stance and shallow draft, and many waves and swells can travel between the hulls instead of below them. This effectively reduces an entire axis of movement and prevents catamarans from rolling excessively.

Drawbacks of Catamarans

Catamarans aren’t advantageous in every way, or else we wouldn’t bother building monohulls. The disadvantages of catamarans limit their use to niche commercial applications and high-end yachts. But what are the drawbacks of a twin-hull design?

Sailing catamarans don’t follow many of the traditional boat handling rules and characteristics that sailors pass down for generations. Some, such as hull speed limitations, are good to do away with—while others, such as responsiveness, are not.

Catamarans aren’t as quick to the helm or responsive as monohulls. There are some exceptions to this rule, but for the most part, you’ll get a lot more feedback from a single-hull vessel. Additionally, the large section of deck between the hulls of a catamaran is prone to pounding in rough seas, which is loud and uncomfortable.

Catamarans can sometimes be twice the width of an equivalent monohull sailboat, which can increase mooring fees and limit docking options.

The final major drawback of catamarans is a consequence of their stability. Traditional full-keel monohull sailboats have a very low center of gravity, which makes them roll in heavy seas but ensures a recovery.

Catamarans have a higher center of gravity, and they can’t right themselves after a knockdown. And though catamarans are less likely to roll, a severe list on a multihull is a much more serious concern than on a ballasted monohull.

Catamaran Vs Trimaran

Catamarans and trimarans are often lumped together, but they have very different design and performance specifications. Trimarans have three hulls, whereas catamarans have two.

Trimarans look a lot like catamarans from the side, but a quick glance at the bow or stern can set them apart. Trimarans are faster than catamarans, as they distribute their weight across three hulls instead of two. This helps them stay centered and reduces interference from pitching and rolling.

Catamarans are fast, but they lose out to trimarans when going head to head. However, catamarans are much less expensive to build and maintain and often have roomier cabins due to their larger hulls.

Types of Catamarans

There are numerous types of catamarans, and their uses vary widely. The catamaran is one of the oldest and most useful hull types, and some variants have been used for thousands of years. Here are the most common kinds of catamaran boats and their uses.

Sailing Catamaran

Sailing catamarans are probably what you think of when you hear the name. Sailing catamarans are sailboats with two identical hulls connected by a center deck. The largest sailing catamarans are spacious and stable vessels that are capable of serious offshore sailing.

Sailing catamarans have a number of notable advantages over monohulls. Monohulls, which are traditional sailboats with a single hull, are limited by a simple concept called hull speed. As the bow and stern wave of a monohull intersect, they cause drag which limits the top speed of the boat.

Catamarans are not bound by hull speed limitations, as they have two hulls. Catamarans can go twice or even three times as fast as similar monohulls and achieve excellent travel times.

Catamarans are also more stable than monohulls, as their wide stance and shallow draft reduce the effect of rough water. They don’t heel, as the force of the wind is counteracted by the double hulls. Additionally, modern sailing catamarans can ‘wave pierce’ by cutting through swells instead of riding over them.

Sailing catamarans come in many shapes and sizes. Small sailing catamarans, such as those used in races and regattas, are known for their speed and relative stability compared to light racing monohulls. Sometimes, they feature a smaller second hull for stability—these are called outriggers.

Sailing catamarans have spacious interiors thanks to the large cockpit between the hulls. This cockpit usually contains cooking and eating spaces, a place to sit, and a hallway between the hulls. The hulls usually contain living quarters and often mirror each other.

Power Catamarans

Power catamarans have an even greater variety than sailing catamarans. These vessels are used for everything from party platforms to ferries and patrol boats.

Power catamarans are a recent development, as engineers and marine architects now realize they have numerous hydrodynamic advantages over other hull types.

Catamarans are much more efficient than other hull types, as they have less drag relative to their size. Additionally, you can build a much larger catamaran with less material. This makes them popular for car and rail ferries, as builders can construct a very wide vessel with two small hulls rather than a narrower vessel with a large single hull.

Military and Commercial Catamarans

Even the military has found a use for the catamaran hull shape. The Spearhead class EPF is an expeditionary fast transport vessel designed for carrying capacity and speed. It has two sharp hulls and a huge cargo capacity.

The Spearhead class EPF is 337 feet long, which is about the same length as a WW2 escort destroyer. Yet despite having a similar length and displacement, these catamarans can travel more than twice as fast—43 knots, or nearly 50 miles per hour. Their great speed is a direct consequence of their catamaran hull type.

Power catamarans are also used as patrol and utility boats on a much smaller scale, with either outboard or inboard motors. The State of Texas uses catamarans to patrol shallow rivers and lakes. Texas Game Wardens utilize state-of-the-art aluminum catamaran patrol boats, which are fast enough to outrun most fishing boats.

There’s another form of power catamaran that you may not have considered. Pontoon boats are technically catamarans, and they’re enormously popular on lakes and rivers throughout the country. Pontoon boats aren’t known for speed, but they’re a great platform for a fun and comfortable outing.

Catamaran Houseboats

The final common type of power catamaran is the two-hulled houseboat. Houseboats don’t always use the catamaran hull type, but it’s common enough that most major manufacturers offer it as an option.

Catamaran houseboats have a few notable advantages over monohull designs. For one, they’re easier to build—especially when pontoons are chosen. Additionally, they’re better suited for navigating shallow water. These vessels can support more weight across their two hulls, offer increased stability, and they’re also efficient.

Why Aren’t Catamarans More Common?

With all the advantages listed in this article to consider, it may seem strange that the use of catamarans is still somewhat limited. At the end of the day, it comes down to economics—as monohull boats and ships are simply cheaper to build.

Additionally, catamarans have some distinct limitations. Monohulls have lots of storage space in their hulls and can carry thousands of tons of cargo safely in all weather conditions. Catamarans lack this space and low center of gravity, so they’re not ideal for transporting cargo past a certain point.

Additionally, monohulls work, and many people are reluctant to experiment with new designs when old designs work just fine. This rule applies to both large and small boats.

A large monohull sailboat can be constructed at low cost from stock plans and reliably sail almost anywhere. Very little complex structural engineering is involved, and looser tolerances reduce cost and maintenance requirements.

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Daniel Wade

I've personally had thousands of questions about sailing and sailboats over the years. As I learn and experience sailing, and the community, I share the answers that work and make sense to me, here on Life of Sailing.

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• PERFORMANCE TOPICS

Optimising Hull Lines for Performance

This article was inspired by a question about the rocker line in the new 8.5m cat Design 256 and I want to stick to the point, so we won’t turn it into a book, but I’ll discuss two issues, hull fineness ratio and some aspects of the rocker profile.

When you manipulate the hull form you’re adjusting the lines in three planes, waterplanes (plan view), buttocks (side view including the keel rocker) and the section shapes. So you need to be aware of how the shapes are changing in the other two planes as you manipulate any one of these three, or all three globally as is now possible with computer modelling.

There are two fundamental constants that you start with and don’t change throughout the process. The big one is the displacement or the amount of buoyancy you need.

If you make the hull finer by narrowing the waterlines you have to increase the draft or make the ends fuller to get back to the required displacement number.

If you flatten the rocker line you have to increase the hull width, fill out the ends, or square up the section shapes rather than having a V or rounded V. 

The other constant is the longitudinal centre of buoyancy. You really can’t do any meaningful shaping of the hull form until you have settled on the these two constants.

A third number that we can plug in as a constant if we want to is the prismatic coefficient which describes bow much volume there is end the ends relative to the cross section shape in the middle of the boat, but in sailing boats this is of less importance compared to other factors. 

The hull lines for Design 256, 8.5m Cat. It's that hump in the rocker line - right under the back of the cabin that brought up the question and is one of the key points discussed here.

Hull fineness.

Fine hulls are fast, but only in the higher speed range. There’s a misconception I come across quite a bit that you can add weight and windage and you’ll still be fast as long as your hulls are fine.

Well you won’t be. Your boat will simply sink to find the new state of equilibrium. If your transoms are submerged you’ll have more drag. If your bridge deck is too close to the water you’ll have slamming. Much better to be conservative with your displacement figure in the design stage than overly optimistic.

And fine hulls have more wetted area so you have more drag in light air where friction resistance is the primary drag factor. 

I’ve seen promotional material for catamarans stating that the boat has less wetted area because it has fine hulls. For a given displacement the minimum wetted area is described by a sphere (or a semi sphere in the case of a floating object). The more you stretch it out in length, keeping the displacement constant, the more wetted area you have.

The more you make the section shape into a deep V or a broad U with tight corners, as opposed to a semicircle, the more wetted area you have. Add into the equation finer hulls are slower to tack.

So fine hulls are only an advantage if your boat is light and has enough sail area to ensure you’re travelling at speeds where form resistance is greater than skin resistance.

In my view the advantage of fine hulls is often overrated as it applies to cruising cats.

At the other end of the scale the resistance curve is fairly flat up to about 1:9 which is still quite fast in most conditions. From there the resistance rises steeply as the hull gets fatter and at 1:8 and fatter you’re suffering from some serious form drag.

This is the rocker line isolated from the lines plan above (in blue) and and the red line shows a more moderate rocker line that achieves the same buoyancy and maintains the centre of buoyancy in the same position.  The bow is to the right.

In the image lower right I've squashed it up and increased the height to make the difference in the lines more obvious.

The difference in the two lines is quite subtle, but races are often won or lost by seconds.

Rocker Profile

So if we’re looking for low wetted area we would want a rocker profile that was even and rounded, relatively deep in the middle and rising smoothly to the surface at each end. But this would give us a low prismatic which is not ideal in the higher speed range, and it’s not ideal for pitch damping which in my view is the critical design factor that is often underrated. 

Pitching is slow. It destroys the airflow in your sails and the flow around the hulls, and your performance is suffering from slamming loads.

The single most effective way to counter pitching is with asymmetry in the water planes. You can achieve that in the with a fine bow and broad transom. Or you can achieve it with V sections forward and a flattened U shape aft. Or you can achieve it in the profile view with a very straight run forward and a bump in the aft sections. A flatter rocker line is better for resisting pitching than an evenly curved one with deeper draft in the middle.

The final result is a combination of all three of these factors.

On a cat like Design 256 the weight is concentrated well aft so we need to get buoyancy well aft.

The kink you see in the rocker profile helps to do this. It also helps to keep the rocker straight for most of its length and smooth the water flow exiting the hull aft at higher speeds, possibly promoting some planing effect.

If we had a more even rocker line we would slightly reduce the wetted area, but we would increase the pitching and the water would exit the hull aft at a steeper angle, increasing form drag in the higher speed range.

How much of a bump can you put in there without creating a flow separation, and how damaging would that flow separation be? I really don’t know. The way all of these factors interplay in the various conditions we sail in is very complex.

Ultimately a lot of this work is gut feel nurtured by experience, observing things in nature and most importantly experimenting and trying new ideas.

Is the new Groupama AC45 a breakthrough that will influence the form of racing catamarans into the future? I don’t think anyone has a computer that can answer that. We have to wait and see.

Symmetric and non symmetric water-planes. The blue line with grey fill is the DWL from the design above. As is typical with modern cat hulls the bow is long and fine, the stern is full and rounded. This is the asymmetry that has a damping effect on pitching. The red line on the other hand is more like you would see on a double ended monohull and quite a few multihulls have also used this shape in the past. It's quite symmetric about the pitch axis and does not have good pitch resistance.

The hull lines of the new 8.5m Sports Cat Design 256

Mad Max , Previously Carbon Copy . She was designed in 1997 but she's the current (2016) title holder of the Australian Multihull Chamionships (2 successive years) and the fastest inshore racing boat in Australian waters.

• Scroll to top

Catamarans: Advantages and the Downsides of a double-hulled

What are the advantages and the downsides of a catamaran.

Let’s talk boats – the classic monohull vs. the cool catamaran. Picture this: the monohull’s got one hull, a bit like a lone ranger with a hefty keel. But the catamaran? It’s like the dynamic duo, balancing on two hulls, with sails right in the middle. Easy peasy!

Why do folks go wild for catamarans, you ask? Well, size and stability steal the show. Catamarans boast more room above and below decks, making ’em a hit with vacationers. Plus, with two hulls, they stay as level as a boss, no wild tilts here! It’s a breezier sail, no wrestling with gravity.

Catamarans are the rockstars of the boating world! These double-hulled wonders bring the party to the high seas. Picture this: more space, less rocking, and a smoother ride – it’s like boating in luxury! With their wide stance, they’re as stable as a yoga guru on one foot. Plus, they’ve got speed that’ll make your hair stand on end! And let’s not forget the views – panoramic perfection from every angle. Catamarans are the ultimate waterborne playgrounds, delivering thrills, spills, and chill vibes all in one sleek package. So hop aboard and let the good times roll, because life on a catamaran is a non-stop fiesta!

And get this – they’re not as picky about water depth, so you can explore shallow spots that monohulls can only dream of. At anchor, you won’t be rockin’ and rollin’ all night. Oh, and did we mention the privacy? The two hulls keep things nice and separate. So, when it comes to boats, it’s safe to say, cats have got it all!

But since not everything is all good, below we have created a list of pros and cons of having a catamaran.

ADVANTAGES | Unlocking the Advantages of Catamaran Ownership

Spacious & stable.

Catamarans are very spacious and stable just like a houseboat, so they make great vessels for a vacation or even for those who want to live on a boat. Catamarans are characterized by their dual-hull design, which provides them with several distinct advantages in terms of space and stability.

• Spaciousness: Catamarans generally offer more interior and deck space compared to monohull boats of similar length. This is because the two hulls create a wider platform, allowing for larger cabins, living areas, and deck spaces. This extra room is particularly noticeable in the main living areas like salons, kitchens, and cabins.
• Stability: The wide hulls of a catamaran provide excellent stability on the water. They are less prone to heeling (leaning to one side) compared to monohull boats. This makes catamarans a popular choice for those who may be prone to seasickness or for those who simply prefer a more stable ride.
• Reduced Rolling: Catamarans are less likely to experience the rolling motion that is common on monohull boats. This is because the two hulls work independently, reducing the side-to-side motion that can be uncomfortable for some passengers.
• Shallow Draft: Catamarans often have a shallower draft compared to monohulls of similar size. This allows them to access shallower anchorages and coastal areas that may be off-limits to deeper-draft boats.
• Privacy: The dual-hull design of catamarans often allows for more private sleeping arrangements. Cabins are typically located in separate hulls, providing more individual space and privacy for guests.
• Entertaining Space: The wide deck area between the hulls, known as the trampoline, offers a fantastic space for socializing, sunbathing, or enjoying the scenery. It’s a unique feature that many catamaran enthusiasts appreciate.

Safety! Catamarans are safe for cruising and even safe for those adventurous people who want to cross the ocean. In fact, catamarans are often much safer than similarly sized yachts. Safety comes from increased motion comfort, great stability, speed, and excess buoyancy due to lack of ballast. Catamarans are good even in rough water.

• Escape Routes : Catamarans typically have multiple exit points, allowing for quicker and easier evacuation in case of an emergency.
• Redundancy : With two engines, two rudders, and often two separate electrical systems, catamarans have built-in redundancy. If one engine or system encounters a problem, the other can usually compensate.
• Bouyancy : In the event of hull damage, catamarans tend to stay afloat due to the inherent buoyancy of their multiple hulls. This provides more time for passengers and crew to take necessary safety measures.
• Visibility : The elevated helm positions on many catamarans provide excellent visibility for the captain, allowing them to see potential hazards or other vessels more easily.

Inside and outside steer

Many catamarans are designed with both inside and outside steering options. This provides flexibility for the captain to choose the most suitable steering position depending on weather conditions, visibility, and personal preference. So, captains have the option to steer from the inside during bad weather or when the water conditions are less than ideal. Keep in mind that the specific configuration may vary depending on the make and model of the catamaran

• Inside Steering : Catamarans typically have an inside helm station located in the main salon or cabin. This allows the captain to steer and navigate the boat from the comfort of an enclosed space, protected from the elements. Inside steering is particularly advantageous in adverse weather conditions or when additional shelter is needed.
• Outside Steering : Catamarans also have an outside helm station usually located on the deck, often near the aft (rear) of the boat. This provides a more open and unobstructed view of the surroundings, which can be beneficial for maneuvering in tight spaces, close-quarters situations, or when the weather is favorable.

Withstand high winds

If you are worried about windy weather, catamarans are also known for their excellent ability to withstand high winds. Catamarans are generally designed to withstand high winds quite well due to their inherent stability and aerodynamic profile. While catamarans are designed to handle high winds, it’s important for any boat, including catamarans, to be operated with caution in extreme weather conditions. The experience and skill of the captain, as well as adhering to proper safety protocols, are crucial for ensuring a safe boating experience in challenging weather. Additionally, all boats should be equipped with appropriate safety gear, including life jackets, navigation lights, and communication devices.

Here are a few reasons why catamarans are well-suited for handling high winds:

• Wide Beam : Catamarans have a wide beam (the distance between the two hulls), which provides a stable platform. This wide stance helps distribute the forces of the wind, reducing the likelihood of capsizing or heeling over.
• Low Center of Gravity : The weight of a catamaran is distributed lower in the water compared to a monohull boat. This low center of gravity contributes to stability in strong winds.
• Reduced Heeling : Catamarans are less prone to heeling (leaning to one side) compared to monohull boats. This means they maintain a more level position in high winds, providing a more comfortable and secure ride for passengers.
• Aerodynamic Design : Catamarans have a sleek and aerodynamic profile, which allows them to slice through the wind more efficiently than some other types of boats. This helps reduce the resistance to strong winds.
• Structural Integrity : Well-built catamarans are constructed with strong and durable materials. This ensures that they can handle the stresses and pressures associated with high winds.

Catamarans rely on the buoyancy of their two hulls as opposed to yachts, that only have a single hull. They can be in shallower water without losing stability or the ability to navigate. Yachts rely on a deeper draft to ensure the performance of the boat.

Less fuel? Yes, catamarans have less resistance to get on plane, which results in fuel economy. Their speed rises steadily and there is little to no spikes in fuel consumption. Catamarans are generally more fuel-efficient than similar-sized monohull boats due to their design characteristics. Here are some reasons why catamarans tend to be more fuel-efficient:

• Reduced Drag : The hull design of a catamaran creates less water resistance compared to a monohull. This means that it requires less power to achieve and maintain a given speed, resulting in lower fuel consumption.
• Lighter Weight : Catamarans are often lighter than monohulls of similar size. This means they require less power to move through the water, which in turn leads to improved fuel efficiency.
• Multiple Engines : Many catamarans are equipped with twin engines, which allows for better maneuverability and fuel efficiency. The ability to operate on a single engine at lower speeds can save fuel compared to running a larger single engine at higher speeds.
• Sail Option : Some catamarans are designed with sails in addition to engines. When conditions allow, using sails can significantly reduce fuel consumption, as the wind provides propulsion.
• Diesel-Electric Hybrid Systems : Some modern catamarans are equipped with advanced propulsion systems, including diesel-electric hybrids. These systems can optimize fuel consumption by efficiently managing power sources.
• Shallower Draft : Catamarans often have a shallower draft compared to monohulls, which allows them to access more fuel-efficient routes, such as shallower anchorages and coastal areas.

DISADVANTAGES | The Drawbacks of Catamaran Ownership

Stability for some is a no go.

For those that are into sailing sports, Catamaran yachts are not the most suitable. Why? Well, for the same reasons that make them great houseboats, stability. For that reason, half of the yachtsmen would never buy them. If there is too much sail exposed to the wind and the force of the wind is greater than the weight of the boat … wow… there it goes. The boat will literally trip sideways over the downwind side hull, capsizing. This can happen to small and large cats alike.

• Performance in Light Winds : Catamarans, especially those with a wider beam, may not perform as well in very light winds compared to monohulls. The reduced heeling and narrow hulls of monohulls can sometimes give them an edge in extremely light conditions.
• Difficulty in Heeling for Sailing Enthusiasts : Sailing purists who enjoy the challenge of heeling and working with the natural forces of the wind may find catamarans less engaging, as they tend to remain level even under sail.

The cost of keeping a catamaran in a marina can vary widely depending on factors such as location, marina facilities, boat size, and amenities offered. Marina fees are often based on the length of the boat. Catamarans, which tend to be wider than monohulls of similar length, may be charged a higher fee to accommodate their beam. Some yacht clubs may not even be suitable for catamarans.

Docking and Close Quarters Maneuvering

Docking a catamaran can present different challenges compared to docking a monohull due to its wider beam and dual-hull configuration. Catamarans often have twin engines and two separate hulls, which can make tight maneuvering in marinas or docking in narrow spaces a bit more challenging compared to monohulls.

• Width : Catamarans are typically wider than monohull boats of similar length. This can make it more challenging to navigate tight spaces in marinas or docking areas.
• Windage : Catamarans have a larger surface area exposed to the wind, which can make them more susceptible to being pushed off course during docking. Captains need to be aware of wind direction and strength when maneuvering a catamaran.
• Propeller Configuration : Catamarans often have twin engines, which can provide more precise control during docking. However, it also means the captain needs to be skilled at maneuvering with dual propulsion.
• Depth Perception : The separation of the hulls can make it harder to judge distances and angles when approaching a dock or slip. Captains may need to rely on experience and practice to develop a good sense of depth perception.
• Visibility : The position of the helm station on a catamaran can vary, but it’s typically higher and more centralized compared to monohulls. This can provide better visibility, but it may still take some adjustment for captains who are used to the lower vantage point of monohull boats.
• Tight Quarters : Maneuvering a catamaran in a crowded marina or in narrow waterways can be more challenging due to its width. Captains may need to plan their approach carefully and consider factors like current, wind, and other vessels.

The services can also be more expensive. Remember, there are two engines instead of just one. The cost of servicing a catamaran can vary depending on factors such as the specific make and model, age, size, and the complexity of its systems. In general, there are a few considerations that may affect the overall cost of servicing a catamaran:

• Twin Engines : Many catamarans have twin engines, which means there are two engines to maintain and service. This can potentially increase the cost of engine maintenance compared to a monohull with a single engine.
• Additional Systems : Catamarans may have additional systems and equipment, such as two steering systems, two electrical systems, and more plumbing. This can lead to potentially higher maintenance costs compared to monohulls.
• Specialized Knowledge : Some maintenance tasks for catamarans require specialized knowledge or expertise due to their unique design. This may result in higher labor costs or the need to hire technicians with specific catamaran experience.
• Sail Handling : If the catamaran is equipped with sails, maintaining and servicing the rigging, sails, and associated equipment may add to the overall cost.
• Anti-Fouling and Bottom Paint : Due to their wider beam, catamarans often have more hull surface area to cover with anti-fouling paint. This can lead to higher material costs for bottom maintenance.
• Insurance and Documentation : Insurance premiums for catamarans may be higher due to their higher value and unique characteristics. Additionally, documentation and registration fees may vary depending on the type of vessel.

It’s important to note that these potential drawbacks are subjective and may not be significant concerns for all sailors or boat owners. Ultimately, the choice between a catamaran and a monohull should be based on individual preferences, priorities, and the intended use of the vessel.

• Party Boat Charter News

Yachting World

• Digital Edition

Best catamaran and multihull: We sail the very best yachts on two and three hulls

• Toby Hodges
• March 20, 2024

Toby Hodges takes a look at all the nominees and the winner of the best catamaran and multihull category in the much-anticipated European Yacht of the Year Awards

There are many categories in the  European Yacht of the Year  awards, from the best  luxury yachts  and  performance yachts  to the  best yachts for families  and event a  best specialist yacht category. But with multihulls rapidly increasing in popularity, the best catamaran and multihull category was possibly the most hotly anticipated.

The small number of entrants in this category in no way reflects the rich range or huge demand for multihulls. Many new models were launched by the big yards in the preceding years and they’re struggling to keep up with bulging order books.

However, these three shortlisted represented a choice pick of the latest fast cruisers and each, in their own very different ways, are responding to this insatiable demand for high end space and pace cruising.

Best catamaran and multihull

Best catamaran and multihull winner 2024 – outremer 52.

My highlight test of 2023? Sailing this Outremer 52 for 200 miles over two days and nights! Quite how such a large vessel, one that is capable of doing laps of the planet in true comfort, is also capable of providing such enjoyable sailing is the secret sauce that helps scoop this prize.

And it was pushed hard for this award by the disruptive HH. But the Outremer is such a well rounded, measured and thought out yacht for bluewater cruising at a reliable speed – it’s the full package, a dream boat for family bluewater sailing and arguably the French yard’s best and most refined model to date.

Designer VPLP was tasked with replacing the popular and well proven 51 with more comfort and stowage, while maintaining the performance. It says it took the best of the 55 (which won this award two years ago), and the best of the 51’s deck plan to create this 52. The result means too many good features to point out here, from the variety of helm positions, including a completely protected position inboard using the swing pedestal, to the well conceived spaces. I’d therefore recommend reading our full test report online or in YW’s June 2023 issue!

Neel continues to enjoy its cruising trimaran niche, using the wow factor of bridgedeck accommodation combined with the type of sailing enjoyment and feedback monohull sailors appreciate.

The impressive lightwind performance and direct feel of a Neel I am used to. But I don’t think I’ve ever been so surprised by the amount of cabins or space as I was on this 52. It’s available with four to six cabins plus the option for two crew cabins aft! Some of this maze works well, other areas, such as the forward cabins in the main hull not quite so well. Horizon and rig sightlines and some finishing also leaves room for improvement.

The HH44 seemingly manages to achieve the space and pace balance in a compact 45ft package, while also being one of the most innovative and exciting new production yachts I have sailed. From its looks to layout, to practical on deck solutions such as swing pedestals, side gates through the bulwarks and transom gates that double as swim platforms and boost cockpit security, it’s packed with fresh thinking.

And on the subject of ‘fresh’, the natural ventilation encouraged into the yacht through those massive forward facing coachroof windows which open – a feat made possible thanks to a stiff carbon composite structure – negates any aircon requirements.

With its deep carbon boards and tall carbon rig the HH44 is a powerful, reactive animal to sail. However, it’s the incorporation of the first parallel hybrid electric drive units which really makes this high tech high performance cat stand out. The electric motors are attached to the aft end of conventional diesel engines, not only providing silent power, but renewable energy through regenerative drives while sailing.

Best catamaran and multihull 2023

Best catamaran winner – nautitech 44.

If the very best catamaran delivers the ideal comfort to performance compromise, here’s a catamaran that seems to strike the perfect balance.

For those who cite a lack of visibility and protection as reasons not to choose this aft helm route, try sailing this first – direct steering brings so much more helming pleasure that you get the enjoyable feeling and communication more associated with a monohull. The attention to keeping weight low and central, vacuum infused vinylester build and a low coachroof and boom all aid this performance. The fine entry Lombard-designed hulls allowed us to properly point upwind at 8 knots (in 13), but it was the hands-on steering sensation that really stayed with me.

While there’s no real inside/outside boundary – the saloon bridges both – the Chedal-Anglay interior design works well. It is not as voluminous as some, but is certainly enough to be smugly comfortable at anchor, finished to a good quality, with walnut Alpi trim as standard. The layout option for a ‘smart room’ office/laundry/bunk room or stowage cabin is indeed really smart.

Out of all the multihulls nominated or sailed last year, this cat impressed me the most under sail. It’s the ideal size to go distance sailing, with good performance, low draught and space for family and friends. It had me dreaming.

Balance 482

I was drawn to the Balance 482, thanks to the combination of good looking modern design, high average speeds and, chiefly, the profusion of clever thinking and practical ideas that it brings. The South African build uses a foam core with E-glass laminate and cored furniture for a light weight of 11.3 tonnes, but also with the ability to take a generous payload.

An electric furler option combined with screecher sail helps offer effortless handling and fun sailing, although the 482 prefers a breeze in the double figures. Smart options such as load cells on the rigging, a bowsprit camera to monitor the anchor chain, plus engine room and mast cams all help for maintaining vigilance. Other features we like include the solar panels properly installed on raised brackets, raincatchers built into the coachroof, and how all sheets and lines are led to the helm station. But the prize solution is the VersaHelm, which allows you to swing the wheel inboard, close off the helm station, and stand watch and steer from a fully protected position.

Catana Ocean Class

The Catana Ocean Class is a bulky model which is geared more towards creature comforts than the higher performance of its predecessors. That said, it uses carbon in the structure and roof, foam cored furniture, the tanks are mounted low in the hulls and it has daggerboards and fine entry bows. The weight savings help it offer a massive 5.5 tonne cruising payload, plus there’s capacious stowage and large tank, refrigeration and laundry capacity.

Positioned between Lagoon and Outremer, the Catana echoes a bit of its sister brand Bali’s concept with its internal cockpit-cum-saloon layout while providing good ventilation via large sliding doors and opening windows. We liked how it’s easy to handle solo from one helm station, including the electric remote control of the boards, plus the layout of the galley and navstation.

Those chasing speed and helming pleasure should perhaps look to the C-Cat 48, as it’s as close to helming a fast monohull as a cruising cat is likely to get and one of the rare times we enjoyed sailing upwind in light breezes on a multihull! This is largely thanks to a lightweight, stiff build – the Comar yard has managed to save 1.7 tonnes over the first boat (9.5 tonnes light) and increased the draught of the curved daggerboards to 2.95m.

A carbon roof and rig comes as standard, as well as an epoxy hull, full carbon deck, bulkheads and compression beam. It is a little quirky with comparatively small volumes, but this François Perus design will outperform most other performance cats and monohulls of a similar length.

The Excess 14 shares that direct sensation you get from aft helms and some of the performance of the C-Cat, but in a more balanced, voluminous layout for cruising. The Excess 14 benefits from the research of VPLP’s Vannes racing office, where attention was focused on weight reduction, with savings particularly in furniture, on improved stiffness (PET foam cored sandwich for main structural bulkheads), and the efficiency of deeper fixed keels.

The result is telling on the water, as it should be for any best catamaran contender, where you can log easy miles: we clocked late 7s upwind, reached in the late 8s and regularly averaged 9 knots with gennaker in 12-15 knots. Clear glass windows give acceptable visibility from the helms through the coachroof and the comparatively minimalist interior. In short it offers a good mix of volume, reasonable performance and enjoyable sailing – see our full review last month.

Sailing performance was another key facet in the battle of the big cats from the big cat yards, Lagoon and Fountaine Pajot. Both models offer luxurious amounts of space for home from home comfort, as watersports bases for long term cruising.

The decision to push the mast to the front of the coachroof to allow for a larger genoa than its recent preference for self-tacking jibs has paid off on the Lagoon 51. It helped us sail efficiently into the waves (albeit not pointing too high) before clocking double figures reaching with the code sail in 15 knots.

The Lagoon’s large flybridge with dual access is a USP at this size that will be a hit or miss deal breaker for many. The 51 offers unrivalled accommodation volume in three, four or six cabins, and relaxation zones, and good circulation through these big spaces. Once again the jury applauds Lagoon for thoroughly testing the prototype model during a six month tour. Over 100 have already sold.

We saw in our December issue how the experienced owners of the Fountaine Pajot test boat choose to live and work full time aboard their Aura 51. It’s a design that promotes space, enough to take friends, family and crucially for them, all the toys to enjoy at anchor. Its capability of averaging 8-10 knots also appeals, although the single side helm and hydraulic steering result in scant connection to the sailing in light winds (the same applies to the Lagoon).

The fact the yard already offers this in a hybrid version and has an electric and hydrogen model in the pipeline could sway some, but the decision between the FP and the Lagoon will likely come down to preference between a central flybridge or offset bulkhead helm together with interior design and layout.

If you enjoyed this….

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Your source for the latest news on yachts, boats and more. Read through our articles to find out how to compare boats and find the right fit for you!

What are the top characteristics of a Catamaran Hull

Jun 23, 2020

less than a min

A catamaran is a boat that has two hulls. This boat can vary in size from large vessels to smaller more personal boats. As a result, catamarans are quite high in demand as anyone can find a size and price that best fits their needs. 

The two hulls of the catamaran can be connected with one another through a simple frame constructed and held together by webbing. Alternatively, a more complex structure can also be used. This structure is designed as a bridge that offers extra space for cabin and cargo needs.

A catamaran is considered one of the most stable and secure vessels to travel with family and friends. In addition, catamarans also offer ample relaxation space whether on the deck as well as below. They have enough capacity to house a few rooms and multiple guests, all thanks to their double-hull . 

Here are some catamaran hull characteristics you ought to know about in order to appreciate these magnificent boats:

• One of the main characteristics of a catamaran hull has to do with its performance . This is also the feature that tells these vessels apart and makes them more reliable than monohull boats. Catamaran hulls have a lower resistance when passing through water. 
• In addition, a catamaran hull offers greater stability when it comes to the initial resistance to capsize. 
• A catamaran hull has less volume than an equal size monohull. 
• Catamaran hulls are distinguished by lighter displacement and shallower draft when compared to monohulls of the same length. As a result, catamarans can be used in shallow waters as well. This feature makes catamarans quite flexible and versatile. 
• Both hulls of a catamaran work together to achieve smaller hydrodynamic resistance which is a great advantage. This feature allows catamarans to demand less propulsive power, whether from sails or engines. All in all, what this means is that a catamaran is a more economic vessel. Research conducted by the Yamaha company has shown that catamarans have a constant rise when it comes to speed and fuel burn. 
• The hulls of a catamaran reduce heeling .
• Also, another characteristic of a catamaran hull is a reduced wave-induced motion which makes the boat more comfortable because it diminishes wakes. 
• A catamaran has both the characteristics of a vee hull and a flat bottom hull, combined into one ingenious vessel. 

If you are interested in exploring more specific features of catamarans and their hulls, have a look around TheBoatDB . This database is designed to allow anyone to search, learn, and compare boats, yachts and catamarans in greater detail.  

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17 Best Catamarans for Sailing Around the World

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Catamarans are quickly outstripping single-hull boats for long-distance journeys. They are more stable and comfortable , and some can travel more than 200 miles in a day. In today’s article, I have put together a complete (well almost) list of some of the best catamarans for circumnavigating the planet; the question is, which one is best for you?

The best catamarans for sailing around the world include: 

• The Fountaine Pajot Ipanema 58

These cats focus on speed, safety, and comfort for longer journeys. 

This article will show you the seventeen best catamarans for long journeys, and why they’re the best. You’ll also learn some great tips on what to look for in a Catamaran and how to save money by buying a used catamaran. Let this list be a jumping-off point for your future research!

Pro-tip; here are the actual costs of maintaining a cat and here are considerations on how to circumnavigate .

Table of Contents

The Best Catamarans for Sailing Around the World 

A catamaran is a double-hulled boat with a deck or cabin area in between (bluewater cat definition in this article ). The double hull design means that the boat rocks less, sits higher on the water, uses less fuel to sail, and can be sailed in shallower waters than a single-hulled boat without worrying about grounding. 

Catamarans come in a variety of sizes and can be sail-powered or motor-powered and range from single-person sailing boats to family-sized yachts. Every catamaran design is different, and the twin-hull shape offers many ways to customize the layout of a ship. 

Each boat on this list is a larger catamaran (+40ft, more on size here ), so if you’re going to sail around the world, you want lots of space for provisions and rest.

Of course, there are tons of technical specs for each of these boats, but I’m going to focus on the overall features of each of these catamarans, what makes them stand out, and why they would each be an excellent choice for a transatlantic journey. 

Antares 44i 

The Antares 44i is an excellent option for sailing around the world and was explicitly designed for long-distance cruising. It performs well in any weather conditions, can be sailed easily by two people, and you’ll be able to sail long distances and live in comfort. 

Although it can be easily sailed by a crew of two I believe that a true bluewater cat should be set up for single-handed sailing, more on that in another article .

This catamaran features a stateroom on each hull and a forward cabin with plenty of storage space. The living and entertainment features include a flatscreen tv and a high-end deck speaker system. 

With this model, Antares dedicates itself to high-quality boats with optimal rigging and engine configurations. 

Atlantic 42

Atlantic is no longer building this catamaran, but there are usually a few pre-owned boats on the market. You can also get it made custom if you love the design, but be prepared to spend more money on a custom boat (custom boat also gets custom problems ;)). 

The Atlantic 42 is slightly smaller than some of the other catamarans on this list but is a seaworthy vessel. 42 ft is what most sailors I interview ( in this article ) said was the smallest cat to safely cross big oceans. It is also a decent size to counter the risk of capsizing (more on that here ).

It has a forward cockpit and pilothouse, which gives the owner a better use of space and makes the boat easier to navigate. With single-handed capability, one person can sail it easily and let the rest of the crew relax. 

One of the best-praised aspects of the Atlantic 42 is its galley, more extensive than most 42-footers (12.8-meter) can offer. 

One of the few 50 footers (15.24 meters) that can be sailed by just one person (many would of course disagree on this).

The Catana 50 is a catamaran worthy of an overseas journey. Its size adds to its stability on the open waters and its ability to sail straight through the choppy ocean and windy conditions. 

The Catana is also incredibly spacious on the inside, with substantial cabins and showers. The biggest downside to the Catana 50 is its price, as it’s much more expensive than most of its competitors. 

Catana also holds up well against some of the fastest cruising cats out there, here’s a list of the fastest cruisers if you are interested in that.

However, if you can find a gently-used Catana 50, you can rest assured that this boat will last! 

The Dolphin 42 is unique because of the use of daggerboards instead of fixed keels. This upgrade means that the boat has some pretty decent upwind performance while at the same time being faster downwind.

Centerboards and daggerboards offer some interesting downsides compared to mini keels. This is an interesting discussion and I suggest you read another one of my articles if you want to deepen your knowledge a little.

These catamarans are some of the lightest on the market. Not many Dolphins were made, so they are relatively hard to find. However, if you want a small, lightweight boat capable of going great distances, the Dolphin 42 is an excellent choice. 

Fountaine Pajot Belize 43

The Fountaine Pajot Belize is another well-built cruising yacht. Its core is made of foam instead of balsa, which reduces the risk of structural damage due to a rotten core in case of water intrusion. 

The design of Belize offers many options for customizability, with large open spaces and a combined saloon, navigation, and dinette area. 

There are two styles of Belize catamarans for sleeping quarters. You can either purchase a boat with an entire primary suite on one hull or one with two cabins in each hull. The first option is great if you are sailing the world alone and not expecting many guests, as it increases the storage capacity. 

Understanding what factors to consider when getting a cat can be hard, there are just so many of them (such as the daggerboard discussion above), I have tried to compile some of the most important in this article .

The boat also has wraparound windows to increase the sense of space in the galley. 

Fountaine Pajot Lucia 40

Fountaine Pajot is one of the best sailboat manufacturers existing today, as their boats are well made and highly versatile. The Lucia 40 is no exception – it’s a smaller boat but has a lot of room for moving around and on-board living. 

The living area is remarkably spacious on this catamaran for its size. 

The galley and lounge easily accommodate 6+people. The Lucia 40 doesn’t disappoint when it comes to sailing either, as the narrow hulls slice through choppy waters with ease. 

Most catamarans today are built to withstand rough weather but that doesn’t matter as much if the crew isn’t up for the task, I firmly believe that the most important thing a boat should consist of, is knowledge. Therefore taking online courses ( two free here ) or reading books ( my favorites here ) is imperative.

Gemini 105M

Gemini’s boats have been on the market for years and are solidly built for cruising. This boat is one of the most popular ever made, I personally would consider something different for offshore cruising, but since it has such a good reputation, I felt I had to add it to the list.

If you want to understand why I am hesitant to take this boat around the world, I recommend you read my article: What are trampolines on a catamaran?

The Gunboat 62 is a great catamaran and set the standards for the rest of the impressive Gunboat lineup. It’s sleek and spacious while being robust and capable of transatlantic journeys. You can easily travel the world in a Gunboat 62 with several people and not feel cramped. 

The yacht was made for speed and power and remains one of the fastest catamarans on the market, even rivaling the newer Gunboat models.  GABO

Although the earlier models of the Gunboat 62 weren’t designed for a lot of cargo, you can still find space for everything you need without compromise. 

Lagoon catamarans are known for their reliability and ease of use. If you are considering a catamaran for the first time and are unsure about the technicalities of sailing, a Lagoon boat is a great option. 

The Lagoon 380 is probably the smallest cruiser on this list, which makes it better suited for solo or couple sailing.  

When I go looking to buy something, whether it be a boat, campervan, or whatever, I create a checklist and classify all the things I want either by NEED or NICE to have.

I believe the Lagoon 380 to be sub-optimal for my NEEDS, even though it does check a lot of NICE boxes, there’s a step-by-step article on the NEED and NICE method here .

There are several cabin options available on the Lagoon 380, but if you’re sailing by yourself, you can settle for three cabins and a larger galley and living space. With a smaller cockpit and broader side decks, the Lagoon 380 packs a lot of practicality and ease of sailing into a more compact catamaran. 

If you like the idea of a Lagoon boat but want a little more space, the Lagoon 42 is the upgraded version of the Lagoon 380. With all of the same benefits, it comes with more space for cabins or storage, making it one of the best-selling Lagoons of all time. 

The Lagoon 42 is also a faster cruiser built for strength. While it’s not the fastest on the market, it works well in choppy waters and windy conditions, making it great for the beginning sailor to go on a more extended trip. 

Many people have completed an around-the-world sail with this ship.

Although there is a flybridge version, I would recommend the “open” version due to several factors, some including increased windage and a higher boom. More on flybridges pros and cons here .

For stability, safety, and durability, you can’t beat the Lagoon 42. 

The Leopard 45 performs better with less storage weight because of the relatively low bridge deck clearance. If the boat is fully loaded, you could experience some wave pounding. However, the cockpit is open and airy, with devices that block the sun and provide maximum comfort while sailing. 

The Leopard 45 is an incredibly beautiful boat,   and has a strong reputation for excellent build quality!

Leopard catamarans are one of my personal favorites, as such I have written an entire article about the brand, so if you want to understand its pros and cons then here is the link . Gabo

Designed in South Africa, it features a high rear arch for extra support and very smoothly connected decks. The galley is large and open, and most Leopards offer a four-cabin plan. If you are traveling with another person, this boat is an excellent option for you! 

The Manta 42 is another classic catamaran that you can buy used (at a decent price), as it is an incredibly seaworthy vessel. While still in production, the Manta was one of the most popular catamarans on the market. 

It is still in high demand amongst circumnavigators. Buying a used Manta 42 usually means that you inherit some of the previous owner’s boat upgrades! 

The Manta 42 also made it to my list of the 9 safest catamarans on the market ( link ).

This blue water cat can be sailed by one or two people, making it ideal for liveaboard couples or long-distance shorthanded sailing. The galley is in the saloon ( instead of in one of the hulls ), making the cabins below more spacious and better equipped. 

Overall, the Manta is well equipped for sailing around the world. 

Nautitech 44

Nautitech is an excellent brand of the catamaran, with several different designs per boat. The Nautitech 44 has a unique feature, you can have it with two options for steering: twin wheels or a single wheel.

The Nautitech 44 also features a cockpit on the same level as the saloon. The door between the two is more convenient than a hatch and dramatically reduces the risk of water damage during rain pour. 

This is also the same boat that aeroyacht president Gregor owns, he has offered some great insights into Nautitech in the book Catamarans (amazon link )

Outremer 45

Outremer is famous for being one of the fastest brands of catamarans on the market. If you need speed, the Outremer 45 might be the perfect choice for you. It has a top speed of 16 knots, which is higher than almost every other catamaran of its class. 

While the Outremer 45 is known for speed, it doesn’t compromise on the quality of living. 

You can settle into life on this boat with complete peace of mind. Even as a beginning sailor, the steering is simple and easy to use, and the autopilot is top of the line, so you’ll be able to sail across the ocean in an Outremer without issue. 

Privilege Serie 5

A French-designed catamaran, the Privilege Serie 5 is one of the most comfortable 50-foot (15 m) yachts available. The unique cabin layout includes the master cabin in the boat’s center instead of in one of the hulls. 

The Privilege Serie 5 is also incredibly easy to sail, despite its larger size. 

The sails and controls lead to the helm, where the raised deck makes it easy to see all around the deck. If you want to cross the ocean with a full crew then the Privilege Serie 5 might be perfect for you! 

Seawind 1000

The Seawind 1000 is the smallest boat on this list, measuring 33 feet (10 meters) long altogether. However, this doesn’t mean that it’s not livable. If you are sailing on your own or with a partner, there is more than enough space to live in the Seawind 1000, which includes the option of a centered cabin or two hull cabins. 

Because it’s small, the Seawind 1000 is easy to handle. The mast and sails are all manufactured for extra stability and ease of use. 

Overall, the Seawind 1000 is an excellent example of a simple, safe, and seaworthy catamaran. 

Note: since this is a small catamaran it will also be more sensitive to heavy weather so trip-planning becomes even more important.

The Voyage 44 is one of the oldest cats on this list, having had its hay-day in the mid-1990s. However, this also means that a used Voyage 44 will be cheaper than a newer boat. If you can find a Voyage with previous responsible owners, you will inherit any upgrades and fixes that they’ve made on top of a very seaworthy boat. 

The Voyage 44 has more storage and space than most cruisers of its size and is known for behaving very well in choppy waters. 

This catamaran does its job well while providing adequate space for cooking, sleeping, and living aboard. 

What To Look For in a Long-Distance Cruising Catamaran

If you are planning to sail around the world, you need to be very careful about which kind of catamaran you decide to use. Many of the things you want in a boat really comes down to personal preference, so be sure you know what design preferences you want before you start shopping! 

Size and Payload

The most important thing to consider when buying a catamaran is how much space and cargo you need because the larger the boats are, the bigger the payload it can handle. Decide how long you want the ship to be and how much you’re taking with you. 

It’s vital not to overload a catamaran, this will reduce performance and increase risk of unwanted behavior in heavy seas.

Cabin Placement  

Most catamarans have options for a “Maestro” cabin placement, where one entire hull is the master suite, and the other cabins are located on the opposite hull.

Cockpit and Protection From The Weather

Is the cockpit on the boat you’re looking at covered or open? This can make a difference on the high seas, especially during rainy weather. 

The size of the ship also can affect how many people you need as a crew. If you’re traveling by yourself or with one other person, you don’t want to buy a boat that needs a larger crew. 

Buying Used? 

If you don’t want to spend the money on a brand new catamaran, I don’t blame you. Several of the ships on this list are out of production and can only be found used. However, for circumnavigation, you do want a boat of high quality to keep you safe and dry until you make it to your destination.  

When buying a suitably used catamaran, it’s essential to look at the refit history of the boat more than the year it was made. Catamarans are sturdy, and the general design has been the same for at least the past decade. 

If you find a newer, larger, cheaper boat, you should look into its history. 

Your best bet to save money while buying a catamaran will be to buy an older, probably smaller boat with an excellent refit history and no serious issues. It will still be an investment, and a sturdy used catamaran will serve you well. 

Final Thoughts

No matter which catamaran you decide to buy for your journey, you’ll be able to sail safely and comfortably. Catamarans are great yachts for long-distance sailing, and the ships on this list are the best of the best. These brands are time-tested and ready to accompany you on an adventure around the world! 

Here are Some of My Favorite Catamaran Cruising Resources

Thank you for reading this article. I hope you found it helpful as you hopefully start your sailing adventures. Here are some resources that I use as a sailor that I hope you’ll also find helpful. These are affiliate links, so if you do decide to use any of them, I’ll earn a commission. But in all honesty, these are the exact things that I use and recommend to everyone, even my own family. Sailboats: If you’re looking for the best boat to suit your needs, I would recommend a catamaran. If you’re interested, I can show you the differences between catamarans and other types of sailboats .

Books:  For getting started, I really like  Cruising catamarans made easy . It is actually a textbook from the American sailing association; it is used to get a cruising catamaran certification. There are some other great books, and I have compiled a list of books about cruising catamarans that you will find useful.

Communication:  Being out on adventures, whether it be sailing or climbing mountains, good communications are essential to being safe. I recommend two things Google fi (incredibly simple cellular data all over the world) and Garmin inreach mini (for text and voice in remote areas without cell coverage)

Sailing courses: Online sailing courses are great for beginners starting out their sailing career; it’s an efficient way of learning the basics of navigation, throttle controls, and maritime safety. I suggest starting with two free courses from NauticEd .

To see all my most up-to-date recommendations,  check out this resource  that I made for you!

• Wikipedia: Catamaran
• Cruising World: A-Z Best Cruising Catamarans 
• Dreamy Yacht Sales: Four Best Catamarans for New Buyers
• Atlantic Cruising: Good Cat/Bad Cat
• Yachting World: Catamaran Sailing Across the Atlantic
• Boat Affair: What is a Catamaran? 
• Nautilus Sailing: Catamaran Sailing

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!

3 thoughts on “ 17 Best Catamarans for Sailing Around the World ”

I like the efforts you have put in this, regards for all the great content.

Thanks Elisabeth I really appreciate the kind words 🙂

I appreciate you sharing this blog post. Thanks Again. Cool.

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Wreckage shows how Titan's hull came apart

An analysis of the wreckage of OceanGate’s Titan submersible has revealed how its hull came apart.

Images of the craft's pieces scattered across the sea floor show the carbon fibre hull had separated into multiple layers - a known problem with the material.

The evidence was presented on Wednesday to the US Coast Guard at a public hearing into the catastrophic failure of the sub in June 2023, which killed all five people on board.

It was not confirmed that the hull was the first part of the sub to fail, but the details suggest it is a key focus of the investigation.

Investigators are seeking to uncover the details of what led to the tragedy and find recommendations that could prevent future deadly voyages.

Titan, operated by OceanGate, imploded less than two hours into its descent during a dive to the wreckage of the Titanic.

Titan's hull was made from numerous layers of carbon fibre mixed with resin.

It’s a highly unusual material for a deep sea sub because it is unreliable under pressure - most craft are made from metals like titanium.

Don Kramer, an engineer at the National Transportation Safety Board, showed the US Coast Guard a series of images of sections of the hull on the sea floor.

He described how in some fragments, the carbon fibre layers had come apart - a known process called delamination.

In other places, the material was cracked.

It was not confirmed whether the damage to the hull had caused the implosion.

“I'm not offering any analysis at this point as to whether [the damage] occurred before or after the implosion,” he said.

Mr Kramer also described how his team had analysed samples of Titan’s hull left over from its construction. They looked at offcuts from when the sub was made.

He described that the samples showed areas where the carbon fibre layers had separated, as well as wrinkles, voids and gaps.

Any irregularities in the material would have affected how the hull performed under the immense pressures under water.

The US Coast Guard was also told how a loud bang heard during a dive a year before the disaster may have damaged the sub’s structure.

Passengers had reported it while the sub was returning to the surface after a dive to the Titanic in 2022. One passenger described it as an “alarming sonic event” while giving evidence last week.

At the time, OceanGate CEO Stockton Rush said he thought it was the sub shifting in the metal frame that surrounded it.

But a new analysis of sensor data by the National Transportation Safety Board suggested that the noise signalled some kind of change to the fabric of the hull.

This may have altered the way the sub was able to respond to the pressures of the deep.

Bill Kemper, of Kemper Engineering, had been asked to compile an independent report into the failure of Titan by the US Coast Guard.

He concluded that at present the root cause for the failure was indeterminate.

“At this time, there are multiple unmitigated single point failures, single mode failures,” he told the Coast Guard.

In his lengthy presentation, he described multiple weaknesses in the sub’s design.

This included an analysis of the sub’s window, that suggested it was being pushed out of shape on each dive and this could eventually result in it cracking. He also outlined serious problems with the carbon fibre hull.