catamaran twin hull

Catamaran Hulls- Everything You Need To Know

• Post Written By: Boater Jer
• Published: July 17, 2022
• Updated: July 19, 2022

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Catamaran hulls are not like normal boats but provide increased stability. Let’s take a look at these incredible boats and how their hulls create one of the most versatile watercraft available today.

The Tamil Cholas used catamarans to ferry their troops to invade Malaysia, Indonesia, and Burma. The early paravars or fishing communities in the southern part of Tamil Nadu used two-hulled boats to fish. Polynesian seafarers were also early users of the catamaran, utilizing the watercraft to get to hard-to-reach islands. ( source )

Although the catamaran hull concept is a relatively new introduction to modern boat design , the boat has been in use since the 5th century. It was used for fishing, traveling, and transporting people and supplies. 

Parts Of A Catamaran

Here are the basic parts of the modern sailing catamaran:

• Hulls are what sets this boat apart from the rest. The catamaran has two hulls, while the monohull, as the name suggests, has only one hull. Most of the advantages of this boat are hinged on these two hulls. 
• The bridge deck connects the two catamaran hulls. 
• On top of the catamaran hulls and the bridge deck is the deck . It is where owners attach most of the equipment in a boat. 
• You can locate the berth, the galley, and other living amenities in the cabin . 
• The cockpit is where you find the navigation equipment of the boat . It is where you control the catamaran’s rudder, sails, and engine. 

Types Of Catamaran

The modern catamaran is far more different than its crude ancestor. Instead of tree cutouts, catamarans are now carbon fiber or fiberglass. Here are the different types of catamarans: 

Based On function

Pontoons are usually present on rivers and lakes and sometimes even on oceans, but they only travel near the shore.

In a catamaran pontoon-type boat, the pontoons serve as storage areas, where you will find the onboard motors. They are useful for water leisure activities such as short water trips, tubing, wakeboarding, and water skiing. 

Some pontoons may also serve as houseboats. They provide a broader, more stable platform ideal for a floating house. Plus, the space is bigger, and most of it is above water. It offers a better viewing option than a monohull. ( Source )

Small Waterplane Area Twin Hull is a catamaran-type boat that the United States Navy initially used for military purposes. They provide the water stability that is necessary when transporting heavy military equipment. 

One example of a military SWATH catamaran is the Spearhead class EPF. It is as long as a World War II escort destroyer, yet it is twice as fast at 43 knots. It can reach that speed because of its two separate hulls.

Because of their innate speed, SWATH catamarans can become patrol boats in lakes and rivers. They can easily outrun and outmaneuver standard watercraft.  

Nowadays, there are SWATH cruise ships and other non-military variations. ( Source )

Based On Design

• Sailing Catamaran

The smaller sailing catamarans do not have auxiliary engines, so the owner can propel the boat by harnessing the wind using the sails. It’s a popular choice for people with very little or no sailing experience because they are light and easy to use. 

The larger sailing catamarans are for group charters and long-distance cruising. They have become so popular lately that they now outnumber monohulls in tropical locations all over the world. They have a last, a headsail, and a mainsail. And the twin hulls have one engine each. 

• Power Catamaran

Unlike their sailing cousins, the powered catamarans do not have sails. They have massive engines which provide high speed. Their twin hulls are stronger and can carry and protect the large motors. 

The smaller “powercats” are used mainly for fishing. The bigger ones are rented out for charters and cruises. 

Catamaran Hulls Performance 

Thanks to the catamaran hulls, the boat offers many advantages over other boat types. 

• Because its dual-hull design provides a broader base, it offers more water stability than monohull boats. It makes the cat (catamaran) a popular choice for fishing expeditions and cruises.
• Riding a catamaran is ideal for people who feel seasick whenever they ride boats. The twin hulls prevent the boat from moving from side to side. The hulls allow the boat to travel smoothly, even on moderately choppy waters.
• The catamaran is the best choice when storing provisions and other household items with less heeling and bobbing. 
• The twin hulls’ stability is ideal for many activities such as cooking and partying. 
• Cats offer more moving space because of their broader base, thanks to dual hulls.
• With a catamaran, you have two great options on where to hang out. You can do it on the spacious deck or below the galley. 
• Compared to a monohull of the same size, the catamaran can accommodate more equipment and people.
• The living area in a catamaran is above the water line. This feature provides more natural light, a greater view of the outside, and better air circulation. 
• Since catamarans do not have keels, they can anchor on shallow waters, something that most monohulls will not be able to do. This ability of catamaran boats is impressive, especially if you are going around areas with many reefs and small islands.
• Catamaran hulls allow the boat to cut through the waves easier and faster. It means they require less engine power than their monohull counterparts.
• Because it has two engines and two rudders, the catamaran can easily maneuver in very tight spaces. 
• Because they do not carry heavy keels, catamarans can sail faster than monohulls. 
• The catamaran’s stability, speed, and weight make it a safer option than the monohull. It can sail in shallow waters, make a 360 degrees maneuver effortlessly, and carry more provisions. 

Disadvantages Of A Catamaran

Like any other boat type, the catamaran also has drawbacks and limitations. Here are some of them:

• The catamaran hulls prevent the boat from sailing as fast as the monohull upwind. The two hulls cause drag, and this slows the boat considerably. 
• Because of its bigger size, looking for a docking site can be more difficult and costlier than a monohull. 
• For hardcore sailing fans, the experience of sailing with a catamaran will never be able to match that of sailing with a monohull. To them, the challenge of true sailing is just not there with a catamaran.

What Are The Hulls Of The Catamaran Called?

According to the Online Etymology Dictionary, the Tamil word கட்டுமரம், which is pronounced as kattumaran, is where the word catamaran takes its name. The word means “pieces of logs tied together”. Through the years, the term has evolved into what is now a catamaran in English. 

What Are The Characteristics Of A Catamaran Hull?

• Both hulls of a catamaran complement each other to achieve very minimum water resistance. 
• Because of this, it takes less energy to propel a catamaran, whether via an engine or sails. 
• The catamaran hulls provide stability to the boat. The twin-hull significantly reduces bobbing. 
• The catamaran’s ability to keep steady on the water makes it an ideal vessel for cooking, dining, and storing provisions. 

Are Catamarans Good In Rough Water?

Catamarans are amazingly stable in rough water. The catamaran’s design and build, which provides stability, are factors why it is one of the best boats to use when the waters are choppy. 

Yes, catamarans are relatively more expensive than monohulls. Nevertheless, since single-hull boats are less expensive, their resale value is also cheap. 

If you add all the advantages that a catamaran offers – safety, comfort, and speed- it does not come out expensive. 

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

Last Updated by

Daniel Wade

August 30, 2022

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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• Catamarans: Exploring the beauty of twin-hulled boats

Catamarans, with their unique twin-hull design, have gained popularity among boating enthusiasts worldwide. Offering stability, speed, and ample space, catamarans have become a favored choice for sailing, cruising, and even fishing. In this article, we'll delve into the world of catamarans, exploring their features, advantages, and various uses. Whether you're a seasoned sailor or considering purchasing your first boat, join us as we set sail to discover the beauty of catamarans.

Advantages of catamarans

A catamaran is a type of boat characterized by two parallel hulls connected by a deck. This design offers increased stability and reduced drag, allowing for smooth sailing and enhanced performance.

Catamarans offer several advantages over traditional monohull boats. These include:

• Stability: The twin-hull design provides excellent stability, minimizing rocking and rolling even in rough waters.
• Speed: With reduced drag and lighter weight, catamarans are known for their impressive speed and efficiency.
• Spaciousness: The wide beam of a catamaran allows for more interior space, providing comfortable living areas, cabins, and deck space.
• Shallow Draft: Catamarans typically have a shallow draft, making them suitable for cruising in shallow waters and exploring coastlines and coves that are inaccessible to deeper-draft boats.
• Enhanced Safety: The twin-hull configuration offers redundancy and increased buoyancy, making catamarans less prone to capsizing.

Sailing catamarans

Sailing catamarans have gained popularity among sailing enthusiasts for their excellent performance and comfort. With their wide beam and efficient sail plans, they can achieve impressive speeds and provide a stable and enjoyable sailing experience.

Catamaran design and construction

Catamarans are constructed using various materials such as fiberglass, aluminum, or composite materials. They can be custom-built or manufactured by renowned boat builders who specialize in catamaran construction.

Read our top notch articles on topics such as sailing, sailing tips and destinations in our  Magazine.  

Catamaran sses and activities

Catamarans are versatile and can be used for a variety of activities. Some common uses include:

Cruising and liveaboard

Catamarans are well-suited for extended cruising and liveaboard lifestyles, offering spacious accommodations and the ability to carry ample supplies and provisions.

Chartering and tourism

Due to their size and comfort, catamarans are popular for chartering and tourism purposes, providing vacationers with luxurious and memorable experiences on the water.

Catamarans are known for their competitive edge in sailing races. Their speed, stability, and maneuverability make them a favored choice among racing enthusiasts.

Catamarans designed specifically for fishing offer stability, deck space, and specialized equipment, making them ideal for anglers seeking a productive and enjoyable fishing experience.

Small catamarans for recreation

For those looking for smaller recreational options, there are compact catamarans available that are perfect for day sailing, coastal exploring, or simply enjoying leisurely time on the water.

Buying a catamaran: Factors to consider

When purchasing a catamaran, factors such as size, budget, intended use, and maintenance requirements should be taken into account. Conduct thorough research, consider professional advice, and take your time to find the perfect catamaran for your needs.

Catamaran maintenance and care

Proper maintenance is crucial for keeping your catamaran in top condition. Regular cleaning, hull inspections, and routine mechanical checks are essential to ensure the longevity and performance of your boat.

Catamarans offer a unique and captivating boating experience. With their stability, speed, spaciousness, and versatility, they have become a popular choice for sailing enthusiasts, cruisers, and fishermen alike. Whether you're seeking an exciting adventure, a luxurious vacation, or a peaceful coastal exploration, a catamaran can provide the perfect platform to elevate your boating experience.

So what are you waiting for? Take a look at our range of charter boats and head to some of our favourite sailing destinations .

FAQs about catamarans

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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What is a Catamaran? The World of Twin-Hulled Boats

• 14 April 2023
• 5 minute read

Alice Martin

Share the post "What is a Catamaran? The World of Twin-Hulled Boats"

Welcome aboard our nautical adventure as we look into what a catamaran is. If you’ve ever been interested by these twin-hulled vessels and wondered what sets them apart from other boats, you’re in the right place! In this post, we’ll explore their unique features and why they’re becoming an increasingly popular choice among sailors. We’ll also touch on the environmental benefits of chartering one, the science behind their stability. Lastly, we’ll provide you with a calendar of must-attend regattas and festivals. With summer approaching and boats ready to book with Click&Boat , let’s set sail and explore the world of twin-hulled boats!

What is a catamaran?

It is a type of multi-hulled boat, with two parallel hulls of equal size, also known as pontoon boats. This unique double-hulled design originated from traditional fishing boats and sailing vessels in the South Pacific and offers a range of benefits for sailors. They are available in various sizes and can be powered by sails or engines, making them extremely versatile.

Different types of catamarans

Catamarans come in different shapes and sizes, each offering unique features and benefits. Cruising catamarans are designed for leisurely sailing, with spacious cabins and amenities. Racing catamarans, are built for speed and performance, with lightweight construction and streamlined design. Power catamarans are perfect for those who want the speed of a motorboat with the stability of a catamaran. Finally, ferry catamarans are larger vessels designed for commercial use, with the ability to carry passengers and vehicles.

Catamaran vs. Monohull: The Great Sailing Debate

The debate between catamarans and monohulls is popular in the sailing community, with both types of vessels offering unique advantages and disadvantages. Let’s explore some of the key differences between these sailing boats.

• Speed: Generally, they have a speed advantage over Monohulls. This is thanks to their reduced water resistance and lighter construction. The top speeds can be up to 60 knots. This power of catamarans is particularly appealing for those interested in racing or covering long distances quickly.
• Space and comfort: Typically they provide more living space and bridge deck than Monohulls. This makes them an attractive choice for families, groups, or long-term cruisers who value comfort and room for onboard activities. Monohulls, while more compact, can still be cosy and offer a more intimate sailing experience.
• Draft and access: They have a shallower draft than Monohulls, allowing them to navigate and anchor in more shallow waters. This can open up a wider range of cruising destinations and reduce the risk of damaging sensitive marine habitats. Monohulls, on the other hand, are limited to deeper waters and marinas.
• Manoeuvrability: Many sailing enthusiasts consider Monohulls easier to steer than catamarans, particularly in tight spaces or crowded marinas. Catamarans, while still agile, require more skill and practice to steer confidently.
• Maintenance and costs: Catamarans are more expensive to purchase and maintain due to their larger size and the need for two engines or sets of sails. Monohulls, while potentially cheaper, can still be expensive depending on their age, condition, and equipment.
• Sailing characteristics : Monohulls offer a more traditional sailing experience, with the boat heeling and responding more dramatically to wind and waves. This can be exhilarating for some sailors, while others may prefer the more level, stable ride of a catamaran.

The Science of Catamaran Stability

The stability is a result of its unique design, which offers several advantages over traditional monohulled boats. Let’s explore some of these!

• Wide beam: This is the distance between its two hulls, provides a stable platform that resists rolling and heeling (tipping) when underway. This means that catamarans are less likely to capsize and provide a smoother ride for passengers in rough conditions.
• Distribution of weight: The twin-hull design allows for a more even distribution of weight across the vessel. This reduces the boat’s center of gravity and makes it more resistant to capsizing, especially in comparison to monohulled boats with a narrower hull and a higher center of gravity.
• Buoyancy and displacement: Each hull has its own buoyancy and displacement, which contributes to the vessel’s overall stability. This means that even if one hull were to become compromised, the other hull would still provide sufficient buoyancy to keep the boat afloat.
• Damping effect: The wide beam of a catamaran also provides a damping effect on the motion of the boat. This means that when the boat encounters waves or wakes, the movement is less abrupt and more gradual, resulting in a smoother and more comfortable ride for passengers.

The environmental benefits of sailing a catamaran

Calling all eco-conscious sailors! Did you know that catamarans are not only fast and comfortable but also offer numerous environmental advantages? Here’s why these boats are becoming more popular amongst sailing enthusiasts.

The boat design translates to less water resistance and energy consumption, making them a greener choice for those mindful of their carbon footprint. Their shallow draft allows you to navigate shallow waters without harming marine habitats like coral reefs and seagrass beds, with minimal environmental impact. Modern boats often accommodate solar panels and wind generators, allowing you to harness clean, renewable energy for guilt-free sailing. Some manufacturers are also turning to sustainable, recyclable materials to lessen the environmental impact of boat production. Click&Boat offers various eco friendly options for those who prefer more sustainable sailing.

Catamaran Regattas and Festivals: A Calendar of Must-Attend Events 2023

It’s time to finish with a list of the must- attend events of 2023! Here are our top recommendations.

Les Voiles de St Barths Richard Mille 16-22 April

With 1,200 sailing enthusiasts and 63 boats, this race takes place over 5 days on difficult coastal routes in the town of Gustavia .

Giorgio Armani Superyacht Regatta 6-10 June

If you are looking for a more glamorous event, this is the one for you. This prestigious event takes place over 4 days off the coast of Sardinia.

Round Texel Race 10 June

This Dutch event is the world’s largest catamaran race, with hundreds of competitors sailing around the island of Texel in the North Sea.

Cannes Yachting Festival 12-17 September

This event is a must-attend for both yachting enthusiasts in Cannes . This show will be one of the top yacht exhibitions in Europe, drawing in around 700 boats annually including luxury catamarans.

So now that you’re up to speed on everything catamaran, it’s time to set sail into the sunset!

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Power Catamarans: A Complete Guide

Dec 06, 2023

less than a min

Power Catamarans, often termed as the epitome of modern maritime engineering, are gaining popularity for all the right reasons. Their distinct design, enhanced stability, and cruising efficiency set them apart from traditional monohull boats and even their sail-driven counterparts. This guide dives into the world of Power Catamarans, shedding light on their advantages and how they compare to other vessels like monohulls and trimarans.

Historical Prelude:

The concept of catamarans traces its roots back to ancient maritime cultures. However, the power catamaran is a relatively modern innovation that marries the traditional twin-hull design with powerful engines, offering a unique blend of speed, stability, and space.

Distinguishing Design:

Power Catamarans are characterized by their twin hulls, which significantly reduce the drag, thus enhancing speed and fuel efficiency. Unlike monohulls, they have a broader beam, which contributes to increased stability and more living space. The absence of a ballast for stability further lightens the vessel, contributing to its speed and fuel economy

Speed and Handling:

One of the significant advantages of power catamarans is their speed and handling. The twin hulls allow for a smoother glide over the water, making them particularly favorable for watersports enthusiasts. Their handling in rough waters is superior to monohulls, thanks to the inherent stability provided by the dual-hull design.

The stability of power catamarans is unparalleled, especially when compared to monohulls. The wide beam and twin hulls provide a stable platform, reducing the rocking and rolling common in monohulls. This stability is not only comforting in rough seas but also crucial when docking or anchoring.

Comfort and Space:

The spacious design of power catamarans offers homelike livability, with ample room for cabins, lounges, and even onboard amenities like grills and bars. The wide beam also allows for large deck spaces, ideal for sunbathing or enjoying the scenic ocean vistas.

Economy and Redundancy:

Power catamarans are economical, with fuel efficiency being one of their selling points. The redundancy built into their design, with separate engines for each hull, provides an added layer of safety, ensuring that the vessel can return to shore even if one engine fails.

Regular Upkeep and Care:

Power catamarans, given their unique design and structure, come with their own set of maintenance requirements. Like all boats, routine checks and upkeep are essential to ensure smooth sailing. The twin hull design means double the underwater gear – from propellers to rudders, which necessitates regular inspections for any signs of wear, tear, or fouling.

Antifouling:

Given that power catamarans have a larger surface area underwater due to their twin hulls, they may be more susceptible to marine growth. Regular antifouling treatments can help in keeping the hulls clean, ensuring optimal performance and fuel efficiency.

Engine Maintenance:

One distinct advantage of power catamarans is their dual-engine setup, but this also means double the engine maintenance. Regular oil changes, cooling system checks, and filter replacements are crucial. It's beneficial to synchronize maintenance schedules for both engines to ensure consistent performance.

The lifespan of a power catamaran largely depends on its build quality, materials used, and how well it's maintained. With proper care, a power catamaran can last for several decades. The engine's maintenance significantly impacts the catamaran's lifespan, with gasoline engines requiring maintenance at 1,200 to 1,800 hours and diesel engines at around 5,000 hours​​. The construction materials play a crucial role; for instance, fiberglass catamarans, when well-maintained, can last for many decades, while aluminum cats might change ownership after 10-15 years but can last a lifetime with proper care​.

World-Renowned Builders:

The power catamaran sector boasts several reputable manufacturers such as Lagoon, Leopard Catamarans, Fountaine Pajot, and other notable names like Seawind Catamarans​.

Lagoon, a revered name under the Beneteau Group umbrella, has carved its niche in crafting luxurious, spacious catamarans. A prime example is the Lagoon 630 Motor Yacht, embodying opulence with its nearly 250 sq. ft. aft deck and 900 sq. ft. interior, comfortably housing up to 12 guests. Known for its superyacht styling, it boasts superior fuel efficiency and a commendable average velocity-made-good of 9 knots.

Leopard Catamarans:

Emerging from the reputable Robertson and Caine shipyard in South Africa, Leopard Catamarans is synonymous with innovation and efficiency. The Leopard 53 Powercat is a testament to this legacy, showcasing excellent seakeeping abilities, offering 3 or 4 cabin configurations, and achieving a top speed of 25 knots.

Fountaine Pajot:

A trailblazer since 1976, Fountaine Pajot constantly redefines catamaran design. The Fountaine Pajot MY6 is a shining example, encapsulating the brand's visionary ethos. Stretching 15 meters, the MY6, equipped with dual engines of up to 2 x 353 Kw and 2 x 480 hp, promises dynamic sailing. Crafted meticulously by Pier Angelo Andreani, the interior mirrors a 20-meter monohull's spaciousness, reflecting modern aesthetics and comfort that stand as a benchmark in the Motor Yacht world.

These manufacturers continue to innovate, offering a blend of luxury, performance, and efficiency in their power catamaran models, making them a popular choice among maritime enthusiasts.

Comparing with Monohulls and Trimarans:

While monohulls are traditional and often cheaper, they lack the stability and space offered by power catamarans. On the other hand, trimarans, with three hulls, provide even more stability but at the cost of additional drag and less interior space.

TheBoatDB - Your Gateway to Maritime Exploration:

If you’re looking to delve deeper into the world of power catamarans and other vessels, TheBoatDB offers a comprehensive boat database. Explore various catamaran models, compare them with monohulls, trimarans, and other types of boats, and make an informed decision on your next maritime adventure.

In summary, power catamarans encapsulate a modern engineering marvel in the maritime domain. Their blend of speed, stability, comfort, and economy makes them an attractive option for a broad spectrum of boaters. Whether you are a long-distance cruiser, a water sport enthusiast, or someone who cherishes the tranquility of the sea, a power catamaran could be the vessel that transforms your maritime adventures into unforgettable experiences.

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Catamarans - high speed and lots of comfort

A catamaran is a boat with two hulls that are parallel to each other and connected in different ways. The name comes from the Tamil language and means "bundle of logs". This design offers high stability on the water and often enables higher speeds than conventional monohull boats. Catamarans are built in different sizes and for different purposes, for example as small beach catamarans, large and comfortable cruising catamarans or fast sports catamarans. They are particularly popular because of their speed and stability, but also their comfort.

Catamarans - more than just two hulls

A catamaran is a special type of boat characterised by two hulls arranged parallel to each other. This distinctive feature gives the catamaran a number of advantages over conventional monohull boats. Firstly, the twin-hull construction offers increased stability. When sailing, catamarans have significantly less lean (heel) than monohull yachts and are also less prone to rolling in waves. Because of these significantly smoother sailing characteristics, the risk of becoming seasick is usually lower on catamarans than on monohulls.

Catamarans are often more efficient than conventional boats. Due to their lower water resistance, they require less energy to move through the water. For motorised catamarans, this can lead to lower fuel costs.

Different types of catamarans

Catamarans differ in size and intended use. A distinction is made between, among others

• Cruising catamarans
• Regatta catamarans

The cruising catamaran - when the centre of life is on the water

Both cruising sailing catamarans and motorised catamarans are designed so that the crew can live on them. They usually have the berths and wet cells for the crew in the hulls. Depending on the size and type of boat, the cabins are very spacious. In many cases, they are larger and more comfortable than on the classic sailing boat . The wider platform connecting the two hulls provides more space for passengers or equipment.

The superstructure between the two hulls usually accommodates the steering position and the Navigation corner . There is also a light-flooded saloon and a galley, the pantry.

Another advantage of cruising catamarans is their shallower draught compared to monohulls. They have no centreboards or keels, if they have flat stub keels at all. They can therefore also sail in shallower water or enter shallow bays.

Regatta catamarans - sailing in a different way

Regatta catamarans are characterised above all by their high speeds. However, a distinction must be made between small beach catamarans or sports catamarans for sheltered waters and ocean-going catamarans.

Beach and sports catamarans

The former are also known as beach cats and are specially designed for use near the coast and on shallow water. They are characterised by their lightness, which makes them easy to transport and allows them to be launched and landed directly from the beach. Their construction is generally simple, without cabins or other heavy equipment, which also contributes to their low weight.

Because of their lightness, beach catamarans can reach very high speeds. They are often equipped with centreboards to prevent drifting, one in each hull. These can be raised. The rudder blades can also usually be folded up, allowing these catamarans to be sailed directly onto the beach.

Despite their lightness and speed, beach catamarans offer good stability and are less prone to tipping than small dinghies, for example. This is why some people find it easier to learn to sail on a catamaran than on a monohull. However, the important feeling for tilting a boat is less strongly conveyed on a catamaran than on a dinghy.

Some well-known models of beach catamarans are the Hobie Cat 16 and the Nacra 17. These boats are popular for recreational sailing and racing.

Ocean-going catamarans

They are characterised above all by their high speeds. They are almost completely devoid of comfort, which makes them extremely lightweight. These catamarans also have no keel, which makes them even lighter than monohulls. However, like all catamarans, they can also capsize. If this happens, ocean-going catamarans, unlike beach catamarans, cannot be righted again without outside help.

Trimarans - one more hull for more speed

Like the catamaran, the trimaran is a multihull. High speeds are its trademark. In contrast to the catamaran, the trimaran has three hulls. The three hulls are arranged parallel to each other. The centre hull is almost always larger and wider than the two outer hulls, also known as floats. In principle, a trimaran is something like a very narrow yacht that rests on the floats to prevent it from tipping over.

A distinction must also be made between cruising trimarans and high-performance trimarans. In cruising trimarans, the hull is extended and accommodates cabins and the cockpit. Overall, however, this centre hull offers significantly less comfort than a comparably sized monohull yacht due to its narrow width.

High-performance trimarans, on the other hand, dispense with comfort altogether. They achieve their high speeds thanks to the favourable ratio of sail area to hull resistance.

Catamaran details

Most catamarans are equipped with sails that are also common on monohulls, Mainsail and genoa. The mainsail is often fully battened and has a very large sail area.

Catamarans have a double rudder, i.e. one rudder at the stern of each hull. On beach catamarans, the two tiller rudders on the rudder heads are connected to each other via a tie rod. The long tiller boom is then attached to the centre of the track rod. On larger cruising catamarans, the rudders are connected to each other via cables that are led to the steering wheel. This allows both rudders to be operated simultaneously.

Beach catamarans are often equipped with a trapeze or even two trapezes. The trapeze is a wire on each side that is attached to the top of the mast. A crew member can then use a harness with a hook to attach themselves to the wire and stand with their feet on the outside of the hull. This brings the crew's weight further outwards and counteracts heeling.

Catamarans - stability is important

The stability of a catamaran is based on its width. Unlike monohulls, where the heeling force from the sails is countered by a keel as a counterweight, catamarans use a different principle.

Due to the large transverse distance between the respective empty hull and the sails, the empty hull generates a high righting moment with a very effective lever. In addition, the windward hull acts as a kind of counterweight. Put simply, the buoyancy of the empty hull acts upwards and the weight of the windward hull downwards. Both forces provide the necessary counter-pressure to the pressure from the sails.

The greater the distance between the two hulls, the more effectively the principle works. Modern racing catamarans are therefore almost as wide as they are long. For cruising catamarans, however, space in the harbour and the design are limiting factors.

This is another reason why cruising catamarans like to anchor in bays.

Modern materials for modern boats

Different materials are used in the construction of catamarans depending on their intended use. Cruising catamarans from large-scale production are made from GRP, as are monohull yachts. There are cost reasons for this. GRP is the most favourable material for the desired properties.

The sportier the concept becomes, whether for a beach cat or a large sports catamaran, the higher the quality of the materials used, such as carbon fibre or aramid. The aim is to keep the weight as low as possible, as these catamarans focus on sailing performance, whereas cruising catamarans are more concerned with space and comfort.

The equipment of cruising catamarans

There are clear differences in the equipment of cruising catamarans compared to conventional ones Yachts . Due to the large amount of space available, there is more room for installations than on a monohull. For example, the tanks for fresh water and fuel are usually significantly larger than on comparable monohulls. With several hundred litres of fresh water, the crew can remain self-sufficient for longer, while the large fuel reserves allow a large radius of action under engine.

The interiors of cruising catamarans also differ from those of modern yachts. The cabins are located in the respective hulls and are therefore far apart from each other, allowing for greater privacy than on a monohull. The berths are located in the cabins. In addition, each cabin often has its own bathroom with toilet and shower. This turns each cabin into its own little flat.

The saloon and galley, usually located on the platform between the hulls, are more spacious than on monohulls. Depending on the size and price, the other Equipment options . Even air conditioning and heating systems are standard on cruising catamarans in many places.

The best sailing area for the catamaran

Here again, a distinction must be made between a sporty beach cat and a cruising catamaran. Sport catamarans can be sailed in almost any area, be it inland lakes or on the coast. They are not intended for the open sea, although very daring sailors have also sailed the oceans with such catamarans.

Cruising catamarans are mainly used in the Mediterranean and in tropical waters. There, they are characterised by their great self-sufficiency. Cruising catamarans are less suitable for the North Sea or Baltic Sea. However, this has nothing to do with their sailing characteristics, but with the conditions on land. There is usually a lack of suitable berths in the harbours.

The costs are higher than for a monohull

Two hulls, a special superstructure and the fact that catamarans offer more space mean that these special ships have higher acquisition costs, but also higher maintenance costs than a classic sailing yacht. The main factor in the purchase costs is that more material is used due to the larger enclosed space. In addition, more labour hours are required and the equipment is usually more expensive than on a monohull yacht.

Mooring costs are usually higher for a catamaran than for a monohull yacht, as it requires more space in the marina due to its large beam. However, the greater comfort and longer self-sufficiency of a catamaran also means that more time can be spent at anchor. In addition to the shallow draught, which opens up more anchoring options, mooring fees can also be moderate if marinas are frequently avoided.

The larger a catamaran is, the more varied the equipment options become. The price ranges therefore increase with increasing size.

Leading shipyards for the construction of cruising catamarans

There are many renowned shipyards that specialise in building catamarans. Here are five of the leading manufacturers:

• Lagoon: As part of the Beneteau Group, Lagoon is a French manufacturer known for its wide range of catamarans.
• Fountaine Pajot: also based in France and also with a wide range of products.
• Catana Group: Catamarans for different requirements are built under the brand names Bali Catamarans and Catana Catamarans
• Leopard Catamarans: Leopard Catamarans, manufactured by the South African shipyard Robertson and Caine.
• Sunreef Yachts: This Polish shipyard is known for its customised luxury catamarans.

Buying a new or used catamaran?

When purchasing a catamaran, it is important to consider whether a new purchase should be made or whether a replacement should be made. used catamaran is purchased. Size, condition and equipment are important criteria for this.

If you are buying second-hand, it is always worth having a specialist at your side to inspect and assess the technical equipment and overall condition. If you buy from a specialist dealer, you can be sure that they are bound by a warranty. The probability of making a bad purchase there is lower than with offers from private sellers.

Charter a catamaran - these requirements must be met

Similar to motor yachts, houseboats and sailing boats, it is possible to charter a catamaran. And worldwide.

A Boat licence is required for cruising catamarans if the catamaran is to be skippered. If this is not available, a skipper can be booked with many providers.

Small beach cats can also be hired almost anywhere on the coast and usually do not require a licence. However, many hire companies require a certificate of competence, such as a DSV catamaran licence. However, you can usually obtain a licence from such providers by completing a sailing course.

Many package holiday providers also offer beach catamarans as part of a club holiday. It is often possible to obtain a licence.

The costs of chartering a catamaran

Sailing is an expensive passion. This also applies to chartering. The cost of a cruising catamaran varies depending on its size, equipment and length. Even the season plays a decisive role. Between 1,500 and 8,000 euros per week are quite possible for a catamaran in the charter sector, but also considerably more. Added to this are the deposit, mooring fees, catering, fuel, cleaning and much more. Costs are particularly high in the high season.

However, as a cruising catamaran offers plenty of space and comfort, it can usually be sailed with more crew than a comparable monohull. This means that the charter costs are spread over more people.

Which areas are worth chartering a catamaran?

Of particular interest in Europe are the countries Croatia , Greece , France , Italy and Spain . From a global perspective, the Caribbean a very popular sailing area with catamarans.

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Full programme at the Cannes Yachting Festival. There have never been so many novelties and premieres to be seen at the trade fair in the south of France

Cape-WT10 This is the new competition for Dragonfly, Corsair, Tricat & Co.

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Nautitech 48 Open in test Further development offers more space for more variance

Multihull novelties Small and large multihulls have a bit more of everything

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47-metre catamaran "Artexplorer" is a sailing work of art

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Astréa 42 on test Mid-size catamaran shows dynamic lines

"Wonderful" Gunboat 72 with flybridge like a roof terrace in a speed rush

Pacific 3200

Beauty & stability.

The Pacific 3200 catamaran is a uniquely designed boat with unparalleled performance. The twin asymmetrical hulls create a high speed, stable, and efficient ride not found in other boats this size. The patented catamaran design greatly reduces side rolls and pitching from wave action. The planing hulls allow you to cruise at 20+ knots, even when the weather turns bad. Reduced drag results in better fuel efficiency, allowing you to go further on a tank of fuel.  The interior has all the features needed for extended cruising and with four different layouts available, you can customize the boat to fit all your needs. All of this, along with the respected SeaSport name and matchless reputation, gives you the finest built, best handling cruising catamaran in it’s class.

Fuel Capacity

Water capacity.

• Twin-hull Catamaran design bombs through chop with ridiculous ease
• Bow-thruster  optionand wide motor base makes docking a breeze
• Flybridge offers endless configuration possibilities
• Impressive fuel performance for such a brute

Great Ride & Flow

• Ingenious use of space, customizable to individual desires
• Made-in-America promise with seasoned craftsmen
• Built to last with limited maintenance and warranty concerns
• Fish, play, and entertain in our Pacific 3200
• Wider engine bracket makes storing the dinghy almost enjoyable
• Outfitted or pre-rigged with any engine make or model
• Best performance with Twin 350

Specifications

General specifications.

• LOA  32’2″
• Beam  12’10”
• Cabin Headroom 6’6″
• Cabin Size (L x W) 11’2″ x 9’5″
• Cockpit Size (L x W) 8′ x 10’7″
• Draft (motors up) 28″
• Draft (motors down)  40″
• Approximate Dry Weight  16,000 lbs
• Holding Tank Capacity  30 US gal.
• Water Capacity  60 US gal.
• Fuel Capacity  400 US gal.
• Sleeping Capacity 8
• Deadrise 22°

Hull, deck and cockpit

• Ten (10) year Warranty
• Diamond Sea Glaze aluminum windshield w/tempered safety glass
• Custom non-skid roof, deck, cockpit surface and gunwale boards
• Self-draining cockpit with scupper drains
• 316L stainless steel bow rail
• Heavy duty rub guard
• Unitized construction
• Anchor locker with bow roller and cleat
• Bomar foredeck hatch with screen
• Sliding forward side windows with screens
• Ten (10) 316L stainless steel 10″ mooring cleats
• Courtesy cockpit lights
• Large cockpit storage compartment
• Bentley helm seat with armrests
• Hardtop 316L SS hand rails
• Deck dogleg 316L SS hand rails
• Cockpit shelves
• Hydraulic steering
• Fiberglass transom door
• Powdered coated diamond sea glaze sliding bulkhead door
• Raw water washdown
• Catamaran hull design
• Fresh water anchor wash down pump
• (4) Bomar port lights

Performance

Comfort and interior.

• Complete marine floor carpeting
• Removable vinyl headliner for easy access to the hardtop
• Large V-berth w/ storage beneath and privacy curtain
• Full fabric cushions
• (2) adj. 12-volt reading lights w/ switch in v-berth
• 110V outlet, GFI protected
• Customized table tops with electric aluminum pedestal
• Wood inlaid table at dinette seating area with storage underneath
• (4) custom interior options
• Dinette converts to sleeper
• Large refrigerator
• Premium wall covering
• AM/FM/CD player with 2 speakers
• Twin helm seats
• Ambient Air Defroster
• 2 Large quarter berths
• Hot and cold water

Galley and Head

• Complete galley top with storage underneath
• Deep sink w/pressurized cold water faucet
• Galley storage cabinets
• 2 burner propane cooktop
• FW electric marine head with macerator
• Head compartment drain with pump
• Hot water shower
• Water and waste tank gauge
• Lighted mirror
• Corner vanity
• Forward hamper

Instrumentation and Safety Equipment

• Sea Sport custom master circuit breaker switch panel for 12V &110V
• (3) batteries, (1) 4D for the house and (2) for the starts
• Seastar steering cylinder with tilt helm
• Deluxe Richie Compass
• Battery charger
• Fresh water tank – 60 Gallons
• Fuel tank – 400 gallons
• Forward facing dual trumpet horn
• Automatic/Manual bilge pumps (4)
• Bennett trim tabs
• Certification/Standard Compliance: ABYC, USCG, CE
• Shore power

Color Selection

• Colored Gunnel Stripe and Boot stripe color options — Blue, Cabernet, Forest Green, Black
• Custom colors optional
• Fabric packages to match gel-coat colors

Specifications as well as standard and optional equipment are subject to change without notice. All measurements approximate. For more information and pricing, please contact your local Sea Sport dealer .

Explore all the Sea Sport Series

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Catamaran Hull Design

• Post author By Rick
• Post date June 29, 2010
• 2 Comments on Catamaran Hull Design

Part 1: Notes from Richard Woods

Since the America’s Cup experimented with going multihull, there’s been a lot of interest in catamaran performance and the catamaran hull designs that define performance. Many guys are investigating whether to buy a catamaran or design and build their dream boat. Let it be said here that building a large catamaran is not for the faint of heart. People begin building 100s of boats a year, yet few are ever completed, as life always seems to have a way of interfering with a good boat build. 

Never the less, since the rest of this website is about selecting and buying a boat , it only seems fair to have at least one webpage that covers catamaran design. This page contains notes on boat hull design goals and an accompanying page from Terho Halme has mathematical formulas used in actual catamaran hull design. It has become a popular research stop and an important reference to the catamaran design community.

The content of this page was reproduced from the maestro of Catamaran designs, renown British naval architect, Richard Woods, who not only designs catamarans, he sails them across oceans…. repeatedly. He has a lot to say on the subject of catamaran hull design.

“…When it’ all said and done, the performance of a sailing catamaran is dependent on three primary specs: length, sail area and weight. If the boat is longer it generally means it’ a faster boat. If she has more sail area, it means she’ a faster boat and if she’ light it means she’ a faster boat.  Of course, there are limits: Too much sail area capsizes the boat in brisk winds. If the boat is designed too light, she will not take any kind of punishment. Too slim a hull design and the boat becomes a large Hobie Cat capable of only carrying your lunch. Of course, too long and large and you’d have to be Bill Gates to afford one. Then there are lot of additional and very important factors like underwater hull shape, aspect ratios of boards and sails, wet deck clearance, rotating or fixed rigging and so on….” Richard Woods

All Catamarans are not equal, but all sailboats have two things in common: They travel on water and they’re wind powered, so the Catamaran design equations in the 2nd part should apply to every catamaran from a heavy cruising Cat to a true ocean racer.

Richard Wood’s comments on catamaran design:

We all know that multihulls can be made faster by making them longer or lighter or by adding more sail. Those factors are the most important and why they are used as the basis of most rating rules. However using just those figures is a bit like determining a cars performance just by its hp and curbside weight. It would also imply that a Tornado would sail as fast forwards as backwards (OK, I know I just wrote that a Catalac went faster backwards than forwards)

So what next?? Weight and length can be combined into the Slenderness Ratio (SLR). But since most multihulls have similar Depth/WL beam ratios you can pretty much say the SLR equates to the LWL/BWL ratio. Typically this will be 8-10:1 for a slow cruising catamaran (or the main hull of most trimarans), 12-14:1 for a performance cruiser and 20:1 for an extreme racer.

So by and large faster boats have finer hulls. But the wetted surface area (WSA) increases proportionately as fineness increases (for a given displacement the half orange shape gives the least WSA) so fine hulls tend to be slower in low wind speeds.

The most important catamaran design hull shape factor, is the Prismatic Coefficient (Cp). This is a measure of the fullness of the ends of the hull. Instinctively you might think that fine ends would be faster as they would “cut through the water better”. But in fact you want a high Cp for high speeds. However everything is interrelated. If you have fine hulls you can use a lower Cp. Most monohulls have a Cp of 0.55- 0.57. And that is about right for displacement speeds.

However the key to Catamaran design is you need a higher Cp if you want to sail fast. So a multihull should be at least 0.61 and a heavy displacement multihull a bit higher still. It is difficult to get much over 0.67 without a very distorted hull shape or one with excessive WSA. So all multihulls should have a Cp between 0.61 and 0.65. None of this is very special or new. It has been well known by naval architects for at least 50 years.

There are various ways of achieving a high Cp. You could fit bulb bows (as Lock Crowther did). Note this bow is a bit different from those seen on ships (which work at very specific hull speeds – which are very low for their LOA). But one problem with them is that these tend to slam in a seaway. 

Another way is to have a very wide planing aft section. But that can increase WSA and leads to other problems I’ll mention in a minute. Finally you can flatten out the hull rocker (the keel shape seen from the side) and add a bustle aft. That is the approach I use, in part because that adds displacement aft, just where it is most needed.

I agree that a high Cp increases drag at low speeds. But at speeds over hull speed drag decreases dramatically on a high Cp boat relative to one with a low Cp. With the correct Cp drag can be reduced by over 10%. In other words you will go 10% faster (and that is a lot!) in the same wind and with the same sails as a boat with a unfavorable Cp. In light winds it is easy to overcome the extra drag because you have lots of stability and so can fly extra light weather sails.

The time you really need a high Cp boat is when beating to windward in a big sea. Then you don’t have the stability and really want to get to your destination fast. At least I do, I don’t mind slowly drifting along in a calm. But I hate “windward bashing”

But when you sail to windward the boat pitches. The sea isn’t like a test tank or a computer program. And here I agree with Evan. Immersed transoms will slow you down (that is why I use a narrower transom than most designers).

I also agree with Evan (and why not, he knows more about Volvo 60 design than nearly anyone else on the planet) in that I don’t think you should compare a catamaran hull to a monohull, even a racing one. Why chose a Volvo 60/Vendee boat with an immersed transom? Why not chose a 60ft Americas Cup boat with a narrow out of the water transom?? 

To be honest I haven’t use Michelet so cannot really comment. But I have tested model catamarans in a big test tank and I know how inaccurate tank test results can be. I cannot believe that a computer program will be better.

It would be easy to prove one way or the other though. A catamaran hull is much like a frigate hull (similar SLR, L/B ratios and Froude numbers) and there is plenty of data available for those. There is also a lot of data for the round bilge narrow non planing motorboats popular in the 1930’-50’s which again are similar to a single multihull hull.

One of the key findings I discovered with my tank test work was just how great the drag was due to wave interference between the hulls. Even a catamaran with a modern wide hull spacing had a drag increase of up to 20 % when compared to hulls at infinite spacing. One reason why just flying a hull is fast (the Cp increases when you do as well, which also helps). So you cannot just double the drag of a single hull and expect to get accurate results. And any speed prediction formula must include a windage factor if it is to give meaningful results.About 25 years ago we sailed two identical 24ft Striders next to each other. They were the same speed. Then we moved the crew of one boat to the bow. That boat IMMEDIATELY went ½ knot faster. That is why I now arrange the deck layout of my racing boats so that the crew can stay in front of the mast at all times, even when tacking or using the spinnaker.

I once raced against a bridge deck cabin catamaran whose skipper kept the 5 crew on the forward netting beam the whole race. He won.

Richard Woods of Woods Designs www.sailingcatamarans.com

• Tags Buying Advice , Catamaran Designers

Owner of a Catalac 8M and Catamaransite webmaster.

2 replies on “Catamaran Hull Design”

I totally agree with what you say. But Uli only talk sailing catamarans.

If only solar power. You need the very best. As limited watts. Hp.

The closer to 1-20 the better.

Closing the hulls to fit in cheaper marina berth. ?

You say not too close. But is that for sailing only.

Any comment is greatly appreciated

Kind regards Jeppe

Superb article

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Catamaran vs Trimaran: Choosing the Perfect Multihull Vessel

26th mar 2023 by toi williams.

The debate over whether catamarans or trimarans are better boats has been going on for a long time without resolution, but the reason is understandable. The truth is that despite their many similarities, catamarans and trimarans have distinct characteristics that set them apart from each other, so each type of vessel offers a distinct boating experience. The catamaran vs. trimaran debate largely boils down to personal preference and how you intend to use the boat. Here are some of the things you need to consider when choosing between a catamaran and a trimaran. 

What Is a Catamaran?

A catamaran is a multi-hulled boat that has two twin hulls connected by a structure supported by a wide beam. Catamarans come in a wide variety of sizes, ranging from small rowing boats to large boats that are big enough to be used as car ferries. The structure connecting the two hulls can be anything from a simple frame with webbing to a superstructure that includes cabin and/or cargo space. Most of the recreational catamarans for sale are designed to hold two to 20 passengers. 

What Is a Trimaran?

A trimaran is also a multi-hulled boat, but it has three hulls instead of two like the catamaran. The middle (main) hull is larger than the two small outer hulls attached to it. These hulls are connected by a lateral beam, wing, or some other form of superstructure, depending on the model. These types of boats also come in a wide variety of sizes, ranging from recreational yachts to ferries. 

Advantages of Catamaran vs. Trimaran

The advantages of catamarans vs. trimarans are mainly based on comfort. Catamarans are spacious boats, known for their large living quarters with plenty of room on board for hosting gatherings and parties. Their popularity has enticed many boat builders to create increasingly luxurious designs on larger and larger boats. The catamaran also has a more classic style that appeals to those who want a boat with a simple, sleek shape. Catamarans are best suited for boating in calm seas, lagoons, and shallow waters.

Advantages of Trimaran vs. Catamaran

The advantages of trimarans vs. catamarans mainly come down to speed. Trimarans are among the speediest boats available, offering lightning-fast speeds on open waters. Many recent winners of notable boating competitions have been won by boaters piloting trimarans. These boats also perform well when heading upwind and are remarkably stable with their three-hulled design. The anchoring gear is installed on the main hull and is easy to deploy. 

Trimaran vs. Catamaran Speed

In the trimaran vs. catamaran speed debate, the trimaran is the clear winner. For long offshore races, trimarans have become the preferred vessels, and boaters piloting trimarans have won the Jules Verne Trophy in every race held since 2010. This is because of their unique design, which has speed and safety qualities that provide significant benefits for boaters. 

The trimaran's third hull makes the boat considerably faster than any other hull form due to the correlation between the boat’s waterline length and its speed. Having more hull distance in the water lets the boat reach higher speeds. Trimarans can also be pushed harder and are more forgiving than other boat styles in racing environments.

That doesn't mean that catamarans are slow. Some styles of catamarans are capable of breaking world records when the boating conditions are right. On downwind runs, a racing catamaran may be quicker than a trimaran, but for overall speed in various conditions, the trimaran comes out on top. 

Catamaran vs. Trimaran Performance

In the catamaran vs. trimaran performance debate, both sides have their advantages. A catamaran is easier to handle and maneuver with the boater having to handle the lines and halyards less often. However, this ease comes at the expense of speed, with cruising catamarans generally traveling slower than comparable trimarans. 

Trimarans are more versatile in their performance, and they perform better than a catamaran when traveling against the current or the wind. Trimarans can be used in nearly all weather conditions, are less vulnerable to drifting, and have less roll motion than a catamaran. However, handling a trimaran requires more work than handling a catamaran, which can be exhausting over long periods of sailing. 

Trimaran vs. Catamaran Efficiency

When comparing trimaran vs. catamaran efficiency, the differences are minimal. Multi-hulled boats are more fuel-efficient than comparable mono-hulled boats due to their hull forms and their lighter weights. Multi-hulled boats also tend to have smaller displacement and shallower drafts than other boat styles. 

The biggest difference in trimaran vs. catamaran efficiency is that catamarans nearly always have twin engines while trimarans generally run with one engine. A trimaran also has less hydrodynamic resistance than a catamaran because it spreads out the displacement across three hulls instead of two. This allows each hull to be narrower and more streamlined.

Catamaran vs. Trimaran Stability

The stability of multi-hulled boats is one of their biggest advantages over mono-hulled vessels. Multi-hulled boats benefit greatly from their wider stance on the water, and their wide beams and floats offer higher stability than a ballasted keel. Multi-hulled boats are also more buoyant because their floats help prevent immersion. When comparing catamaran vs. trimaran stability, the better boat will depend on the conditions on the water.

A catamaran's geometrically stabilized design reduces both heeling and wave-induced motion, providing a stable platform underway and at anchor. However, the catamaran's design is not as suitable for navigating heavy seas as the trimaran's build. The trimaran's three hulls provide excellent stability even in rough waves, but this can also make a trimaran less comfortable than a catamaran when the water is calm.

Catamaran vs. Trimaran Safety

Both catamarans and trimarans are considered to be safer on the water than mono-hulled boats. A catamaran has superior resilience and roll inertia that makes capsizing extremely unlikely. Its speed, steadiness, and ease of motion due to a lack of ballast also contribute to increased safety.

Trimarans are considered the safest multi-hulled boats because their three-hulled design makes them almost unsinkable. Many also have a core made of high buoyancy foam, helping them stay afloat even in the most brutal storms. Weight centering and a complete anti-drift scheme also make the boat safer for everyone aboard.

Trimaran vs. Catamaran Maintenance

Comparing trimaran vs. catamaran maintenance costs shows that many of the costs will be very similar for both types of boats. These costs include yearly boat service and repairs, annual haul-outs, and insurance coverage but exclude major upgrades. You will also have to budget for dockage, winterization, and storage for each year if you don't intend to use the boat year-round. 

Boaters are advised to budget between 5% and 10% of the boat's value for annual maintenance costs if their boat is less than five years old and a little more if the boat is older than that. Different maintenance jobs can be charged in different ways. Sometimes, the charges are based on the length of the boat while other charges are based on the number of hours worked.

Catamaran vs. Trimaran Cost

If you are looking for an affordable seafaring vessel, catamarans and trimaran are both good choices. There are many reasonably priced catamarans and trimarans suited for families as well as other models that provide more luxury for an additional cost. The materials that the manufacturer used to build the boat and the electronics included will also impact the price of the boat.

With so many different factors impacting the cost of different boats, you should choose the best vessel for you based on the features you want as well as your budget. Doing some research using the information on Rightboat's listings will help you find the right combination of quality and affordability you are looking for. Because we offer both new and used boats, nearly any boater will be able to find a boat in our listings that fits their needs. 

Choosing between a catamaran and a trimaran may seem simple at first, but the different sizes, styles, and amenities offered can make the choice much more complicated than you would think. If you prefer comfort and ample space while cruising, a catamaran may be the better choice. However, if you like speeding across the water and enjoy the thrill of racing, then a trimaran may be your best option.

Whichever boat you decide to purchase should fit your specific circumstances and requirements. Start the decision-making process by deciding what the primary use for your new boat will be. Will it be used more for family cruising or sport fishing? What bodies of water will you be boating in? Are you planning on staying close to shore or taking the boat into deeper waters? All these factors will impact whether you should choose a catamaran or a trimaran. 

With Rightboat's listings, you can learn about the features of the latest catamaran and trimaran models and see what you can expect to pay for the boats you are considering. You can sort through our listings by price, age of the boat, length of the boat, or listing date and then narrow down the results of a search using the rest of our filtering tools. If you are interested in buying a new or used catamaran or trimaran, take a look at our listings, and see what we have to offer today!

Related article: Ketch vs Yawl

Written By: Toi Williams

More from: Toi Williams

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The Angling Advantages of Twin-Hull Boats

The twin-hull construction provides not just the famous smooth catamaran ride, even in snotty conditions, but also more speed and better fuel economy on the run to the fishing grounds.

Twin-hull boats, like World Cat’s line of power catamarans, offer a number of key and perhaps under-publicized advantages to fishermen. World Cat, located in Tarboro, North Carolina, is the largest maker of power catamarans in the world. While fishermen in the Southeast and Pacific Northwest are well accustomed to the chop-eating performance of a World Cat or Glacier Bay Edition boat, anglers in the Northeast are just catching on to how a power catamaran can deliver better fishing, greater comfort, and more days on the water.

The twin-hull construction provides not just the famous smooth catamaran ride, even in snotty conditions, but also more speed and better fuel economy on the run to the fishing grounds.   Since the buoyancy is on the outer edges of the boat, a twin hull design also provides remarkable stability and less roll when drifting or trolling, compared to a mono-hull. This stability allows multiple anglers to fish on one side with minimal listing, even when boating a big tuna.

And because the weight of the boat is distributed over two hulls, World Cats have a shallower draft, allowing fishermen to explore shallow bays that other boaters can’t reach. World Cat’s 230 Center Console, for example, draws bay boat-like draft of just 9 inches. Similarly, thanks to the fact that the beam is carried all the way forward, anglers enjoy more open area at the bow of a World Cat.

Other advantages of a twin-hull boat include the limited bow rise and greater visibility when under way and the incredible close-quarters maneuverability thanks to the widely spaced engines, making docking a breeze. To see the full line of World Cat boats, and to see the full advantages of power catamarans, visit WorldCat.com .

• Check out OTW’s picks for the best new fishing boats

World cat’s new 320dc dual console catamaran is the most versatile cat ever..

At 32’2” and with a wide 10’6” beam, World Cat’s new 320DC is a full-blown offshore fishing machine with 500 quarts of insulated boxes, 279 gallons of fuel and a big 35 gallon livewell at the stern. But it’s also highly flexible: the raised bridge deck has numerous amenities, the huge bow area has lounges galore, and the dual air-conditioned cabins host both a double berth and a full stand up head. All this is built into a catamaran hull design that smooths out big water while drawing just 16”. With dual 300 horsepower four-stroke engines, she tops out at over 50 miles per hour and has a range of over 400 miles at a comfortable 28 miles per hour cruise.

LOA: 32’2″ Beam: 10’6″ Hull Draft: 16″ Freeboard Aft: 26″ Transom Height: 25″ Fuel Capacity: 279 gal (2 x 139.5 gal) Max HP Rating: 600 HP (2 x 300 HP) Approx. Dry Weight:* 11,600 lbs Trailering Height:** 11’2″ Bridge Clearance: 9’8″ Cockpit Length: 74″ Freshwater Capacity: 45 gal Wastewater Capacity: 15 gal Typical Cruise:*** 24 mph / 1.50 mpg Typical WOT:*** 45 mph / 0.83 mpg Seating: 14 people

Importantly, with 40 square feet of open cockpit area, the self-bailing, non-skid aft cockpit is a fisherman’s dream, with bolsters and rod holders and a 40 gallon raw water livewell in the aft port corner. Cutting board and tool holders are right where they are needed too. The transom door is offset to port and leads out onto the big extended swim platform between the engines. On those days when you need to work a fish around the props, you can move around the stern like a pro.

2 on “ The Angling Advantages of Twin-Hull Boats ”

Is twin hull Cantamarans safe during thunderstorms bad weather choppy seas? Please advise.

I get sick when my Dad used to take me out on his midV hull. Does the twin hull also reduce sea sickness?

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12 of the coolest multihull superyachts

The market for multi-hull superyachts has skyrocketed in recent years as owners begin to favour the high volumes and superlative stability on offer. Once the novelty of a small group of owners, a recent slew of multi-hull concepts and the success of shipyards such as Sunreef has confirmed that two and three-hulled superyachts are well and truly on the up. We remember some of the most ground-breaking multi-hull launches...

White Rabbit

One of the coolest launches of 2018, the 84 metre White Rabbit is the largest trimaran in the world. She was built in fibreglass by Australian Yard Echo Yachts with exterior design by Sam Sorgiovanni and naval architecture by One2Three. White Rabbit was delivered to an experienced owner who owns a number of other multihull superyachts, including a 51 metre shadow catamaran, also built by Echo Yachts, which will be used as a support vessel; for the 84 metre trimaran.

More about this yacht

Inspired by Game of Thrones, the 66 metre shadow catamaran Hodor is a support vessel used to carry all the toys and tenders for her mothership. The vessel is fully custom and was designed by Incat Crowther. Hodor boasts five tenders, including a 17 metre chase boat and a 388 Skater powerboat with a top speed of 165 knots. Other toys include nine Jet Skis, two Yamaha ATCs, four Yamaha TW200 trail motorcycles and a three-person submarine.

A true icon,  Adastra was launched in 2012 by Australian yard McConaghy Yachts . With a length of 42.5 metres and a sleek Kevlar and GRP exterior, this space-age design is every bit as out-of-this-world as its name suggests. Made for exploring, an impressive 10,000 nautical mile range means she can cross the Atlantic twice before needing to refuel. A shallow draft of 1.2 metres allows her to access hard to reach anchorages and shallow bays too.

In 2011,  Hemisphere was launched as world’s largest sailing catamaran with an LOA of 44.2 metres - and she remains so to this day. Built for American owners who had previously chartered a catamaran in the Caribbean, this British yacht was a bespoke project by Pendennis . Fully kitted out for diving, Hemisphere ’s port hull contains a dive centre capable of refilling both air and Nitrox tanks.

Yachts for charter

Royal falcon one.

The 41.4 metre Royal Falcon One is a quirky catamaran launched in 2019. She was designed by Singapore-based Royal Falcon Fleet in collaboration with F.A Porsche Design Studio and built in Sweden by Kockums. Accommodation is for up to 10 guests in five spacious cabins, including a full beam master suite with its own private deck space. Crew are housed in the two hulls.

Launched in 2015,  Spirit is a 35 metre New Zealand Yachts powercat featuring  Ken Freivokh interiors and naval architecture by Bakewell-White Design . A perfect example of how catamarans can help to maximise the living space available, Spirit has the interior volume you might expect from a 45 metre monohull. Her unconventional looks will make her stand out from the crowd in her new home of Australia, but Spirit is just one of many striking multihull superyachts to have hit the water in recent years.

Pilar Rossi

Formula One racing legend Nelson Piquet’s yacht Pilar Rossi was built in Turkey as a modest 33 metre Alucraft motor yacht. But his uncle, a Brazilian naval architect, helped Piquet convert her into a 64 metre sailing trimaran by adding outriggers and two masts. The reborn trimaran can accommodate up to 18 guests.

Galaxy of Happiness

Unveiled to the world in May 2016, Galaxy of Happiness  is one of two 53 metre trimarans to be launched by Latvian yard Latitude Yachts . This multihull superyacht is built from a GRP and carbon fibre composite and is capable of a top speed of 30 knots. The interior, designed by Latitude Yachts and Jean-Jacques Coste , features an owner’s cabin and two guest cabins.

Launched in 2004, this Chinese catamaran from Pride Mega Yachts may look like a vision of the future, but the inspiration for Asean Lady is actually ancient. The twin hulled 88.15 metre yacht is based on the proa design that has been used for more than 2,000 years to build fishing boats in the Pacific region. Her stability was put to the test in December 2004 when she survived the Indian Ocean tsunami while moored off Phuket.

Flexibility is the key word that informed the design of the 33.7 metre  Quaranta . Launched at Turkish yard Logos Marine in 2013, this catamaran superyacht features the kind of interior volume more commonly associated with a 40 metre yacht. All six guest suites are located on the main deck and the absence of structural bulkheads means that they can easily be reconfigured. This innovative system helped Quaranta to win the catamaran award at the 2014 World Superyacht Awards .

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Choosing the Right Boat: Single Hull vs. Twin Hull vs. Multi-Hull

while single hull boats are fast, they aren’t as strong or durable as twin hull or multihull boats. Twin hull boats contain two separate hulls attached at the bottom.

The twin hull and multihull boats are more stable and stronger and therefore safer in rough seas. However, they do cost more to maintain and are more expensive.

Table of Contents

What are the different types of boats?

The main types of boats are single-hull, twin-hull, and multi-hull vessels.

Single-hull vessels are typically smaller boats, often made of fiberglass or wood, with a single continuous hull.

They provide stability and are generally more efficient than larger boats but are not as strong or durable as the other types of boats.

Twin hull boats have two separate hulls that are connected together. This type of boat is usually larger and provides better stability and strength.

It is also more expensive than a single-hull boat but can last longer if properly maintained.

Multi-hull boats, such as catamarans and trimarans, have three or more separate hulls which provide greater stability and are safer in rough seas.

Multi-hull vessels are typically faster and better suited for long-distance travel, making them the preferred choice for many sailors.

Single hull vs. Twin hull

Single-hull boats are the most common type of boat and typically the least expensive.

They are typically the most stable type of boat and, when properly designed, can be very efficient and strong. They are also easy to maintain and can last for many years with proper care.

The primary benefit of a single-hull boat is that it is relatively easy to navigate in open water. They also tend to be more affordable than other types of boats.

However, single hulls are not as safe in choppy water as twin hulls.

Twin hull boats are more expensive than single hulls, but they offer many advantages.

They are much more stable in rough waters and tend to handle better in those conditions.

Twin hulls are also more efficient than single hulls, meaning they can travel further on the same amount of fuel. Additionally, the two separate hulls help to reduce the risk of sinking in the event of an accident.

Overall, single-hull boats are a good choice for beginner boaters looking for an affordable and stable option.

Twin hull boats may be a better choice for experienced boaters who need a vessel that is more efficient and safer in rough seas.

Twin hull vs. multi-hull

When it comes to boat designs, twin hulls, and multihulls are some of the most popular options.

While both have advantages, it’s important to understand the differences between them in order to make an informed decision when selecting a boat.

A twin-hull boat is composed of two separate hulls that are connected by a deck.

This design has been around since the early 1900s and is still one of the most popular types of boats today.

It offers good stability, low drag, and good carrying capacity. However, twin hulls can be more difficult to maneuver, and they require more energy to move through the water.

Multihulls, on the other hand, consist of two or more hulls that are connected by a single deck or pontoon.

This type of boat has gained popularity in recent years for its stability and speed. Multi-hulls offer more interior space and storage capacity than traditional single-hull boats.

Additionally, their low center of gravity makes them ideal for navigating large bodies of water.

The downside of multi-hull boats is that they require more power to move through the water and can be expensive to build and maintain.

Is twin hull catamaran safe during bad weather?

When it comes to safety, a twin hull catamaran is generally considered to be one of the safest types of boats available.

This is due to the fact that the two hulls provide additional stability and improved balance in choppy water.

The design of a catamaran also gives it superior windward performance, meaning that it can stay afloat better in strong winds and choppy waters than a single hull boat.

The wide, stable platform of the catamaran also makes it highly unlikely that it will tip over during bad weather, as long as the weight is distributed evenly between the two hulls.

However, if the boat is loaded with too much weight, it can become unstable and cause the boat to capsize.

Additionally, if the waves are too large, the twin hull catamaran can be more susceptible to rolling over than other boats.

Overall, when compared to single hull and multi-hull boats, a twin hull catamaran is generally considered to be the safest option for bad weather conditions.

If you plan on using your boat in choppy waters, make sure to properly distribute weight and pay close attention to the size of waves for maximum safety.

Does twin hull also reduce sea sickness?

One of the benefits of twin-hull boats, also known as catamarans, is that they can reduce sea sickness compared to single-hull boats.

This is because the two hulls provide more stability on the water, creating less rocking and rolling than other types of boats.

Additionally, the wide beam of a twin-hull boat can disperse wave energy more easily, making for a smoother ride.

Since the design of a twin-hull boat eliminates the need for a keel, it can be easier to maneuver in rough waters.

The flat bottom surface of a catamaran also results in less drag and higher speeds than other types of boats. This can make for a much more comfortable ride in choppy waters.

All these factors combine to make twin-hull boats ideal for anyone who suffers from sea sickness or who likes a smooth ride while on the water.

With their increased stability and speed, they can make navigating even the roughest of waters much more enjoyable.

What are disadvantages of multi-hulls?

When it comes to multi-hull boats, there are a few drawbacks that must be taken into consideration. The most obvious of these drawbacks is the cost.

Multi-hulls can be very expensive and may require a large initial investment. Furthermore, due to their design, multi-hulls can be more difficult to maintain than single-hull boats.

As a result, their upkeep costs can be significantly higher than those associated with single-hull boats.

In addition, multi-hulls are not as fast as some other boat designs. This means they may not be the best choice if you’re looking for speed and performance on the water.

Finally, multi-hulls may not be the best option for smaller bodies of water due to their size and weight.

If you plan on sailing in tight areas or navigating shallow waters, a single-hull boat may be a better option.

What is the most efficient boat hull?

The most efficient boat hull is determined by several factors including the size, shape and weight of the vessel.

A well-designed hull can reduce drag and increase speed while also increasing fuel efficiency.

S ingle hull boats tend to be more efficient due to their streamlined design and reduced weight. However, multi-hull boats such as catamarans or trimarans are becoming increasingly popular due to their superior stability and fuel efficiency.

The choice between single and multi-hulls ultimately depends on the purpose of the vessel and how it will be used.

For those looking for maximum speed, a well-designed single hull boat may be the best choice.

The low drag created by the single hull will reduce the power needed to reach top speeds, allowing for faster cruising and racing times.

Additionally, they tend to be lighter in weight which will allow them to reach higher speeds with less power.

For increased stability, multi-hull boats may be the ideal choice.

Their wider base allows for more balance in choppy waters and reduces the rocking motion often experienced in single hull vessels.

Additionally, the two or three smaller hulls create less drag than a single larger hull, resulting in improved fuel efficiency.

Ultimately, it comes down to personal preference when choosing the most efficient boat hull.

Consider your needs and intended purpose when making your decision – whether it’s speed or fuel efficiency, safety or stability, there’s sure to be an option that fits your needs.

What is the strongest hull?

Different types of hulls provide different levels of strength, depending on the application and usage.

Single Hull: A single hull boat is usually made from a sheet of metal or fiberglass and features one large, curved section that creates a v-shaped profile.

This type of hull is designed for stability but can be more prone to damage in rougher seas.

Twin Hull: A twin-hull boat consists of two hulls connected together by a bridge deck, typically creating a catamaran-style design.

Twin hull boats are incredibly stable, making them ideal for navigating choppy waters, but can be more difficult to maneuver in tighter spaces.

Multi-Hull: A multi-hull boat is composed of three or more hulls connected together.

This type of hull is incredibly strong, making it suitable for larger vessels, but also has a higher risk of capsizing due to its increased buoyancy.

What is the safest hull design?

Different hull designs offer different levels of protection and stability in rough seas.

Single-hull boats, or monohulls, are the most common type of vessel on the water. These vessels are characterized by their single, rounded hull which offers good stability and maneuverability in many sea conditions.

Twin-hull vessels, or catamarans, are two separate hulls connected by a central platform and offer superior stability and balance due to their wider beam.

Finally, multi-hull boats have three or more separate hulls, usually connected to one another by a central platform.

These vessels offer excellent stability and speed due to their increased surface area, but they can be more challenging to maneuver in tight spaces.

In terms of safety, it is generally accepted that catamarans offer the best protection against rough seas due to their wider beam and additional hulls.

What type of hull lasts the longest?

Generally speaking, single-hull boats are less durable than twin or multi-hulls, as the latter two types provide better stability and protection from the elements.

Single-hull boats are usually made from fiberglass or wood, both of which can be easily damaged by UV radiation and other weather conditions.

Over time, these materials can become brittle and break down, leaving the boat vulnerable to structural failure.

On the other hand, twin and multi-hull boats are typically made of more durable materials such as aluminum or steel, which are better able to withstand harsh conditions.

In addition to the material used, the design of the hull can also affect its longevity. Multi-hull boats have a wider base and more stability, which reduces wear and tear over time.

Additionally, twin and multi-hull boats often have an extra layer of foam insulation between the hulls, which provides further protection from the elements.

CATAMARAN BOAT ADVANTAGES

Catamaran twin hull shapes, specifically Twin Vee boats, are designed to exploit the phenomenon of kinetic fluid induction to produce what we believe to be the driest and smoothest ride of any boat in their class.

As a Twin Vee moves through the water, the boat hull has lifting strakes on each hull’s sides. Lifting strakes produce lift at the bow of the boat by displacing water, allowing the boat to, in essence, glide above the water rather than lumber through it. Many lifting strake designs use negative angles, which can generate lift. Twin Vee’s lifting strakes work to not only create lift but also to make the ride smoother. A catamaran boat’s forward motion lifts water toward the top of the tunnel while pushing the water inward to form two counter-flowing vortexes. As these vortexes are formed, the unique Twin Vee hull design aerates them with small air bubbles, which are then compressed at an increasing rate as the vortexes move down the tunnel.

It is the kinetic energy stored in these compressed air bubbles that creates a smooth and stable ride. As speed increases, the kinetic energy increases at a non-linear rate as more and more air is inducted into the increasingly faster-flowing vortexes. The Twin Vee hulls’ trailing surfaces are specifically designed to facilitate propulsion efficiency by discharging the kinetic energy and air bubbles from the counter-flowing vortexes upon exiting astern, thus providing the propellers with a steady flow of super clean and highly-ordered water.

This fact, combined with a catamaran’s soft ride, results in Twin Vee’s renowned efficiency and smooth, seaworthy safety. At speed, the Twin Vee’s displacement hull slices through the water, traveling by the sea’s shape rather than flying over them and experiencing reentry shock. This results in a stable and smooth ride.

The following are some benefits of the catamaran, or Twin Vee hull shape:

Wider Footprint

Better for rolling seas. Catamaran buoyancy is on the boat’s outer edges, therefore, providing superior stability.

Shallow Draft

When traveling in “skinny” waters,  The weight of the boat is distributed between two hulls providing access to areas that conventional hulls cannot reach.

Greater Load-Bearing Capability

Loaded with maximum capacity, the self-bailing system on any size Twin Vee still functions as designed.

More Usable Deck Space

A Twin Vee’s expanded deck area is relatively rectangular and allows for more usable deck space than monohulls.

Single Engine Get Home Capability

Catamarans with twin motors do not need to climb toward the surface of the water with planing speed power to travel rapidly on a single engine.

Minimum Bow Rise For Greater Visibility

A Twin Vee deck is parallel to the water at all speeds allowing you to maintain your line of sight and give greater visibility over the bow.

Docking And Maneuverability

With the extra separation between motors, you can cross-clutch the motors and turn in their own length.

Smaller Wake At A Higher Speed

Twin Vee hulls do not produce big wakes at higher speeds like monohulls.

360° Of Fishability

Enjoy fishing without the extreme listing of a monohull.

These combined characteristics, incorporated into the classic Twin Vee stylish design, provides the high-quality experience and superior value our customers have come to expect. This is further proof that Twin Vee boats are indeed the “ Best Riding Boats on the Water™ “.

Prepare for takeoff. Countdown to summer 2024.

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Hull and Deck

• (2) 475 Quart Coffin Box Tubs with Raised Stainless Steel Insert
• (2) 700 Quart In Floor Fish Boxes with Macerators
• 10” Stainless Steel Pull-up Cleats – (6)
• 360 – Degree Walk Around Fishability
• Above Deck Live Wells
• Anchor Locker with Fender storage
• Bilge Access Thru Mechanical Room Hatches in Cockpit
• Cup holders: Stainless Steel (10)
• Drain covers: stainless steel w/Twin Vee Logo
• Electric Reel Outlets (4)
• Folding Transom Dive Ladder
• Foldout Tackle and Gear Storage Port and Starboard
• Fuel Cells “Florida Marine Tanks” 375 Gallon each x Fuel Level Sensors
• Gel Coat Colors: Ice Blue, Seafoam, Whisper Gray or White
• Grip Tek – yacht-style non-skid 
• Integrated Digital Switching System
• LED Courtesy lights throughout, Blue 
• Lewmar Stainless VX2 GO 700w Windlass
• Pop Up 3 ½” Fender Cleats (6)
• Rear Facing Tackle Station with Drawers
• Resin Infusion Construction for all Fiberglass Parts w/ Carbon Fiber support for strength
• Rod holders: (20) Stainless Steel – 10 per side Gunwale & (8) on Aluminum T-Top connect piece
• Rod Holders: Aluminum transom mounted “Euro” rod holders 10 total (5) each port/stbd
• Rub Rail: Thick Flexible rub rail with insert, white or black
• Stainless Marine Outboard Brackets
• Stainless Steel Bow and Stern Tow Eyes – (3)
• Stainless Steel Bow Roller
• Starboard Side Tuna/Dive Door
• Tension hinges: Stainless and Brass
• Thru hulls: Stainless Steel
• Transom Swim/Fish/Sun platform 
• Twin Vee logos, Model Designator logo 
• Under Gunwale Rod Racks Port and Starboard
• Underwater LED lights 
• Upper Bow Storage with Molded Fiberglass Hatches
• Wash down: Raw water washdown, stern

Console, Helm & T-Top Features

• 3 Bank battery charger
• 3 Spoke Polished Stainless Steering Wheel w/ Turning Knob
• ABYC Standard Fire extinguisher
• Acrylic Dash Panel w/ extra-large surface area for electronics
• AGM Sealed Batteries 
• All Digital Switch panel: Gloss Black Panel push buttons [blue LED lights/red in use], USB, and 12v receptacle with circuit breaker protection
• Battery selector with on/off switches (2)
• Console Accessory Storage with USB Ports
• Electric Marine Horn
• Freshwater Marine Head with Macerator
• Fully Enclosed Tempered and Tinted Glass Windshield
• Ritchie Voyager Compass
• Seastar All Electric Steering 
• White Powder Coated Aluminum Doors Port/Starboard

T-top Features

• Aluminum Powder Coat Gloss/Textured (White or Black)
• Electric motorized anchor light/electric antenna mount
• Flood/Search Light Bar LED, forward & aft, 10,000+ lumens- independently switched
• Integrated Powder Coated Aluminum T-top system, flush mounted onto the console
• LED Cockpit and Compartment Accent Lighting Throughout
• Molded Fiberglass Hardtop w/ Radio Box and Rocket Launchers 
• Motorized Anchor and Antenna Mount 316 Stainless Steel Hardware 
• Spreader Lights with 360 Degree Lighting

Livewells, Pumps & Storage

• “Hooker” Live well Sea Chest with Variable Speed Pumps 
• 2000 GPH Bilge Pumps with “Ultra Safety” Bilge Switch (4)
• Coffin insulated storage/fish boxes – forward-facing/upholstered chaise lounge seating
• Freshwater Washdown in Bow
• Raw Water Washdown Pump
• Twin transom live wells (45gal), (1 ea.) port & stbd

Seating and Upholstery

• Bow Storage, Insulated and Dry, with Hatches, Friction Hinges
• Entertainment Center Stainless Steel Sink with Bait Prep and Freshwater Washdown
• Forward Facing Console Lounge Seating
• Premium Triple Captain Helm Chairs with Second Row Seating 
• Premium GG Schmitt aft seating w/ polished stainless-steel port/stbd

40′ 0″

12′ 0″

FUEL CAPACITY

750 Gallons

DRY WEIGHT w/ Engines

COG from Bow

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BOAT OWNERSHIP

Catamaran Versus V-Hull: Which Rides Better?

• By Kevin Falvey
• Updated: December 2, 2004

The controversy rages in dockside watering holes, tackle shops, and Internet chat rooms: Which rides better-a catamaran or a V-hull? So far, all the talk has been purely subjective: A cat feels like this, a V-hull feels like that. To us, that’s useless. At Boating Magazine, we need hard numbers, things that we can quantify, then we’ll decide. So we took a Regulator 26, which just might be the best-riding V-hull for its size, and a Glacier Bay 260 Canyon Runner, one of the best-riding cats, and wired them with expensive sensing gear. Rather than a match between two specific boats, it would be a comparison of the finest qualities of each type. We expected the cat to be smoother when the going got rough, but what about the other times? Is it the most comfortable all-around boat? It took us a year-that’s right, one full year-to compile and understand the data, but here, finally, is the answer.

Measured Madness Our first problem was how to quantify a boat’s motion underway. The best tool we came up with is an accelerometer, which records changes and degrees of motion. We also had electronic gear to measure the boats’ angles, WAAS-enabled GPS units, rangefinders to measure distances, four laptops, stopwatches, plumb bobs, measuring tapes, and eventually, a collection of soggy notebooks.

To help us make sense of what we compiled, and back up our conclusions, we enlisted two top naval architects. So we’d like to thank Rick Strand, president of Strand Technologies, a consultant to companies such as Tillotson-Pearson, Boston Whaler, and Brunswick; and John H. Deknatel, president of the legendary design firm C. Raymond Hunt Associates.

With their help, the evidence became clear. What we discovered should silence the know-it-alls and may surprise the enlightened. Without question, we’ve killed the controversy. The boat type with the most comfortable ride is…

Not so fast-to understand our answer, you need to know how we approached the question.

Three Easy Pieces First, we wanted to measure how differently cats and V-hulls turn. To do this, we set up a buoy and had each boat make the tightest 180-degree turn it could at 30 mph. The diameter of each boat’s turn was about the same, although the V-hull averaged 8.4 seconds compared to the cat’s 8.9 seconds. The important difference, however, was how each banked in the turn.

Our electronic angle indicator showed the cat leaning outward by 26 degrees. The unit may have been over-reading due to outward force, but none of the techies from the indicator’s company could confirm this and they therefore stand by its number. By any measure, the cat did lean outward at a steep angle, which can be disconcerting to say the least. Loose gear slides more when a boat leans opposite the turn, and the push that occurs at the apex can make you feel as if you’re going to be thrown out. Of course, with time, you can get used to this. Furthermore, the lean can be minimized by trimming up the outboard engine and trimming down the inboard.

In contrast, the V-hull banked inward by 10 degrees. This not only feels natural, it also has a practical advantage. Centrifugal force pins you and your deck gear into the boat, and you need no special trimming techniques-just turn the wheel.

Both boats are designed for fishing, so our second test was to see how each fared while drifting.

To start, we measured each boat’s roll period-how long it takes to roll all the way to one side and back again. Too short a roll period foretells a jerky motion at sea, too long may mean there’s not enough initial stability. The cat’s period was 2.2 seconds. The V-hull’s was 2.4 seconds, almost 10 percent slower-which in this case is good.

Given our experience with a cat’s less-than-gentle motion at drift, we expected its period to be a lot shorter than the V-hull’s. In hopes of explaining this, we headed out into the ocean.

After the two boats took their natural drift angle in four-foot waves, we looked at the mean G forces each experienced. The cat showed 0.92 Gs, and the V-hull showed 1.18 Gs. So the cat is more comfortable, right?

Not quite. On average, it took the cat 1.15 seconds to reach those Gs, whereas it took the V-hull a little longer at 1.17 seconds. That is, the V-hull accelerated 2 percent slower than the cat. And, as we’ll get into later, slower accelerations equal more comfort.

The results from the accelerometer confirm our roll period tests. The cat, with its greater initial stability, resists rolling. When you stand on its rail at the dock, you notice it hardly leans at all. Most folks think this stability makes for a better boat offshore. But that same resistance to listing at the dock causes a cat to follow the contour of the waves while drifting. The steeper the wave face, the more the cat leans over.

The V-hull has less initial stability, so it gives a bit to your weight at the dock-and to oncoming waves. Its ability to roll easier means it’s not forced to follow the contour of the wave. Instead, as a wave approaches, the boat leans toward it, levels out at the crest, and then leans back into the retreating wave on the way down. In this way, it’s trying to remain level, rather than trying to conform to the angle of the water it’s floating in.

Our third test was to see how smooth each boat ran on a “perfect” boating day, one with a small one-to-two-foot chop on an open bay and a 10-mph breeze. We ran the boats side by side, and the differences shown on the accelerometer were negligible.

So far, after three tests, the V-hull had come out on top in two, and both boats were about equal in one.

We Take It Outside “But what about how they ride when it’s rough?” we hear you ask. “That’s what we really want to know.” And we plan to tell you. But our contention is that there’s more to boating-and enjoying it-than this one element. Unfortunately, and unfairly, bar talk often centers around this, so here we go.

We chose a day when the waves were four to five feet with a six-second period-your typical “rough day.” We ran the boats 100 feet apart at 29 mph directly into the waves. It didn’t matter which boat we were in, it was uncomfortable. Anyone but a masochist would slow down or change course, but we’re here for science.

The graphs on page 86 (see “Graphic Violence”) represent the two boats hitting the same wave. Sharp readers will note that the impacts shown for the two do not exactly coincide. The time each boat hits a wave varies, and a given wave isn’t consistent in shape over its length. Since the boats couldn’t be tied abreast of each other, this is the best anyone can do.

We made numerous runs. For statistical accuracy, we examined seven individual waves for each boat and on each run.

Before giving you the numbers, let’s just say that our accelerometer numbers are dead accurate. But on test day the time between entering a wave, bottoming out, and leaving the wave occurred in less than 0.3 seconds-which is not uncommon. According to Deknatel, “That’s too short a time for your body and brain to process the full effect of the event.” The accelerometer, however, is capable of measuring what we can’t feel.

To accurately compare the ride for a real human, not the machine, you need to look at more than just the peaks of the graph (maximum G force). You need to look at the steepness of the graph’s slope (the time it takes to reach that force), too. A boat that develops more Gs doesn’t necessarily mean it has a harsher ride. It depends on how fast that force is applied. For example, if your 250-pound buddy gently leans on you, what you feel is different than if he were to hit you with a running tackle.

The curve for the cat peaks at 3 Gs; the V-hull, on the other hand, peaks at 4, meaning the cat has 25 percent less gravitational force.

We can also see that the cat consistently decelerated slower when it hit the wave than the V-hull did. It had an average deceleration of 0.287 seconds, compared to the V-hull’s 0.081 seconds-which is 3.5 times faster.

The cat not only landed with less force, it decelerated slower as well. The two combined say it has the more comfortable head-sea ride.

Our test day was rough, so much so that our testers were hard-pressed to say from their gut which rode softer. But, again, the machine is more sensitive than any human, and numbers don’t lie: The cat’s numbers were clearly better.

Later tests also showed the cat delivered lower Gs and slower decelerations while running downsea, in quartering seas, and in the trough. So it’s the most comfortable boat right? Well, not so fast.

Rough Guide We weren’t through testing yet-although some tests were hardly high science.

For example, to see how wet riding each hull was, we taped paper towels to the front of the console. Cats often “sneeze,” or throw a fine mist on certain headings. In this case, and even in the test day’s rough conditions, both sets of towels came back dry.

Then there were issues we couldn’t quantify, such as how a V-hull can dig in its bow going downsea to occasionally make steering difficult, or how in quartering seas a cat’s two hulls catch at different times, requiring constant small steering adjustments.

And there were things that we didn’t have time to test, such as the effect of weight. Typically, a V-hull rides better as it gets loaded down with gear and fuel, which is just the opposite of a cat. Also, our offshore tests were on closely spaced waves. On widely spaced rollers, where boats become airborne, the results would have been different.

In the end, for many boaters, especially those who seem to spend more time in gin mills and chat rooms than on the water, ride quality simply means how softly a boat handles head seas. By that standard, as measured by our accelerometers, and in our test conditions, the cat was the clear winner.

But ask yourself, how often do you go out in weather like that? To make the results of our tests worthwhile for you, ask yourself, “Which boat rides better in the conditions I expect to meet?”

For example, if you have to run far and fast to get to an offshore fishing ground, the cat is a better choice. If you fish close to home, and drift or troll more than flat-out running, the V-hull would be better.

Take all our tests into consideration, and the boat you buy will be the right boat-your Mr. Smoothie.

• More: Boats , express fishing , Fishing Boats , glacier bay catamarans , multipurpose , versus

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This Speedy 70-Foot Power Catamaran Is Designed To Cut Through Rough Waters

Howard walker.

Back in April, Storm Kathleen slammed into the west coast of Ireland as a fearsome Force 10 gale, packing 113 km/hr winds and 15-foot waves. While locals sandbagged their homes and prepared for the worst, Frank Kowalski decided it was a swell day for a boat ride.

As owner of Safehaven Marine in County Cork, he’d just launched his brand-new, 70-foot T-2000 Voyager all-weather power catamaran. What Kathleen offered was a chance to put the new super-cat through its paces.

“We knew from scale-model tests that she should be able to tackle waves of more than 65 feet high,” Kowalski tells Robb Report . “But you never know until you’re out there. In the height of the storm, she just shrugged off the waves and weather and performed flawlessly.”

Evolved from Safehaven’s 75-foot XVS20 monohull launched in 2018, Kowalski used his expertise in building commercial, work-boat power catamarans to design the twin-hulled T-2000 Voyager to offer speed with stability.

“The stability in beam seas is what’s key here,” he says. “While we were out recently in a Force 8 with 40-plus knot winds and 12-foot seas, we were able to stop and leave the boat to drift while we retrieved a drone. It just took the waves on the beam with ease. In a monohull, it would have been rolling so badly you couldn’t have stood on the deck.”

Then there’s the sheer velocity that comes with twin, scalpel-thin hulls slicing through waves. With the T-2000’s pair of 1,550 hp MAN V12 diesels driving France Helices SD5 surface drives, the Safehaven can hit a top speed of 91.73 km/hr.

“It’s just the most amazing sight, standing on the stern, watching these huge roostertails behind,” Kowalski adds. “We’ve also incorporated retracting swim platforms so you can see the props spinning on the surface, plus valved exhausts that switch between silenced and straight-through. The noise from those V12s is sensational.”

While Safehaven has been building its Wildcat range of 40-, 53-, and 60-foot power cats for everything from oil-rig support, crew transfer, and even as a military cruiser for Britain’s Royal Navy, they were always pure, no-frills work boats. With this new T-2000, Kowalski is looking to appeal to private buyers searching for something a little different.

His hull No. 1 demonstrator boat has all-diamond-quilted marine leather, well-finished cabinetry, colored LED lighting, and below-deck accommodations for six in three cabins. Hull No. 2—already sold and due for completion in the next 18 months—will up the luxury factor.

“It’s going to a client in the Middle East who plans to use it for just himself and his wife,” says Kowalski. The client has specified a full-width owner’s suite with a central, king-size bed and oversized his-and-hers bathrooms and closets in each hull. “He also wants to go fast—very fast,” Kowalski continues. “So we’ll install twin 2,000 hp MAN V12s, again with surface drives, and a central hydrofoil to reduce drag. The plan is for it to hit a top speed in excess of 69 mph.”

The new T-2000 is also designed to go the distance. With the 2,900-gallon tanks, it has a range of more than 1,000 nautical miles at 34.5 mph, and 1,700 nautical miles at 18 mph. Throttle back to 12 mph and range increases to 3,000-plus nautical miles.

Much of this is down to the yacht’s symmetrical, semi-wave-piercing hulls, made of a carbon-fiber-composite construction, with inverted lower bow sections and a double-chine arrangement that projects spray clear of the boat. The hydrofoil in mid position also means that, at speed in calmish seas, the T-2000 rides with half its hull length out of the water.

To eliminate waves slamming into the bridge deck windshield, Kowalski moved the pilothouse farther back. It also makes for a sleeker profile, giving the T-2000 the look of a single-hull sportsyacht.

As for creature comforts, the main, open-plan salon features an L-shaped Corian-topped galley, with a U-shaped dinette opposite. To enjoy the action, there are bucket-style, shock-absorbing seats for the captain and copilot, a wraparound sofa on the port side, and a single bucket seat to starboard.

The entire helm area gets flooded with light courtesy of the four-panel, angled windshield and quartet of fixed skylights above. To see the boat’s hydrofoil in action, the bridge has a glass panel in the floor that’s also designed for viewing marine life below at night. Most of the windows have half-inch-thick toughened panels to shrug off cascading water.

In finer weather than typically found on coastal Ireland, the T-2000 has a small flybridge with a helm station and sun-lounge area up top, plus a covered stern cockpit with sofas and table for alfresco dining.

This storm-tested, metallic-red demonstrator is available for around $3.35 million (RM14.55 million)

Safehaven Marine

Previously published on Robb Report USA

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