best catamaran hull design

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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 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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Optimising Hull Lines for Performance

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

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

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

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

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

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

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

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

Hull fineness.

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

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

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

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

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

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

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

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

Illustration of buoyancy distribution in catamaran hull

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

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

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

Rocker Profile

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

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

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

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

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

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

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

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

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

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

Catamaran hull lines showing symmetric and asymmetric waterplanes

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

Lines plan for the Livewire 28 Catamaran

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

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

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Catamaran Design Guide

Spectacular sunsets in the Pacific turn the horizon into a brilliant spectrum of gold and orange colors.

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

Bruce Number (BN)

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

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

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

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

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

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

Displ = weight of the boat in pounds

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

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

Sail Area to Wetted Surface (SAWS)

SA/WS = Sail Area Wetted Surface Coefficient

SA = upwind sail area

WS = total underwater surface area (hull and appendages)

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

Hull Fineness Ratio (HFR)

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

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

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

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

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

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

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

P max = maximum pressure exerted onto sails

Multihull Stability & Capsizing Moment

height of sailplan CE

half overall beam (half hull beam)

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

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

Stability Coefficient (SC)

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

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

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

Boa = Beam overall

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

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

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

Catamaran Stability Considerations

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

~ Bernard Moitessier

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

Continue reading here: Hull

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Design Dynamics - Catamarans Guide
Hull Construction - Ship Design
Geometry - Ship Design
Principles of Yacht Design Ena
Heavy Weather Tactics - Catamarans Guide

Readers' Questions

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

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

What is a 16 passenger catarmarn like?

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

Is the catamaran hull floor always on the waterline?

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

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

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

What keel to length ratio for catamarans?

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

Is 70% length to beam ok for a catAMARAN?

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

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

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

Yachting World

Digital Edition

The best bluewater multihulls of all time: a complete guide

Toby Hodges
October 6, 2021

Toby Hodges and François Tregouet consider the best bluewater multihulls and look at the options for sailing the oceans in spacious comfort

What are the best bluewater multihulls for long term cruising? The one you own, or the one you can afford is the simple answer.

There is a wealth of proven designs to suit bluewater sailing and a variety of budgets. While we have focussed here on the best bluewater multihulls in production, we’ve also included some cracking pedigree multihulls which tour the planet and might occasionally pop up on the brokerage market.

If you can afford to, then pushing towards the 45-50ft length will buy you space, pace and that extra payload capacity needed to take all the items you’d want on your home afloat.

When looking at the best bluewater multihulls, the choice will come down to that perennial balance between comfort/space and speed/weight. Choosing a lighter weight performance design will obviously help you cover distance voyages more rapidly and potentially allow you to outrun weather systems. It means you can sail faster, with less sail up and less load and stress. But you’ll have to sacrifice some luxuries and need to be quite scrupulous about keeping weight down and centralised in order to maintain high average speeds.

For the majority of cruisers, however, it is the amount of space multihulls offer once you’ve reached your destination that really appeals. As well as the non-heeling living area and real estate they provide, they’re well suited to typical tradewind sailing .

If you’re considering your first or next multihull, we hope the following will serve as a taster.

Best bluewater multihulls for performance cruising

Outremer 51/55.

When you think of multihulls designed for bluewater cruising, Outremer will likely be one of the first names that comes to mind. Its heritage lies in building catamarans that can sail fast and are built strong enough to do laps of the globe.

The 51, the current version of which launched three years ago, is an archetypal example of what to look for in terms of blending speed and space is a dream design for a family circumnavigation.

The French yard’s new 55ft VPLP design may look boldly different from its past models, but the philosophy behind it remains the same. It is designed to match windspeed up to 12 knots and Outremer reasons that its ability to sail in 5 knots of breeze will allow it to sail for 95% of the time on a circumnavigation.

Read more about the Outremer 51 and Outremer 55.

Photo: Diego Yriarte

Seawind 1600/1370

For nearly four decades the Australian Seawind brand and its founder Richard Ward have been gearing catamarans around safe bluewater sailing, including performance, protection and ease of handling. Its Reichel Pugh-designed 1600, which launched three years ago, is an elegant looking cat with relatively low, long lines and some smart solutions for fast bluewater sailing.

Seawind also launches its new 1370 later this year, a staggering 60 of which have sold on plans alone.

This first 50 is built from a composite sandwich of basalt fibre, a cloth made from volcanic rock, and PET foam from recycled plastic bottles, which helps to reduce carbon emissions by nearly 50% when compared with traditional glassfibre methods.

This new 50 footer is perhaps a more appealing and practical prospect than Rapido’s previous 60 (with its significant fixed beam), particularly as the amas on this new model can fold to reduce beam to 18ft.

Infused carbon foam sandwich construction is used, along with beams, daggerboards and rudder in pre-preg carbon to keep displacement to 8,200kg.

Balance 526

The 526 launched four years ago, designed to suit short-handed sailors and families looking to sail long distances, hence it can carry large payloads and promises easy maintenance. It looks good too.

Berman’s Versahelm design is a key feature. The wheel cantilevers, allowing the helmsman to steer from outboard with clear sightlines or from the hardtop protection of the aft cockpit.

Photo: Christopher White

Atlantic 47

The A47 suits short-handed fast ocean sailing at an approachable size. Lengthening it to 49ft allowed for an aft cockpit. It is available as a sloop or with White’s patented MastFoil ketch rig – rotating aerofoil masts designed for easy short-handed cruising without sacrificing performance.

Catana 53/Ocean class 50

Catana’s performance model from 2017, sports twin aft helms (which may not suit ocean sailors), reverse bows and carbon daggerboards. The high topsides help create good bridgedeck clearance and plenty of accommodation. Its new Ocean Class 50 seems more in the shipyard’s bluewater DNA. The light weight, and dynamic and modern shape with slim hulls and a relatively short nacelle suggests a seaworthy nature and high speeds.

Best bluewater multihulls for pedigree performance

Veteran multihull designers Morrelli & Melvin designed this smaller model for the Gunboat range. It was built to be more manageable for an owner-driver yet still capable of up to 300-400 mile days.

The Gunboat 48 is something of a rare breed, just six 48s were built between 2004 and 2009. Oh, to have a spare €1.3m right now… one of them is actually on the market.

Chincogan/Lightwave

Tony Grainger has been drawing fast multihulls for 35 years, including racing trimarans and the Lightwave and Chincogan cruisers. The popular Lightwave 38 has admirable performance and comfort, and the Chincogan 52 (pictured) has the length to clock high average speeds.

Outremer 45 G. Danson

With its characteristic roof, narrow hulls and daggerboards, the Outremer 45 is a standout design which has become somewhat iconic. Despite a rather spartan interior, it has been a great success with fast cruising enthusiasts. On board, family ocean crossings at an average of 10 knots are the norm.

Best bluewater multihulls for family cruising

Photo: Nicolas Claris

The Lagoon 450 remains the most popular model in Lagoons already popular range. It exemplifies the VPLP/Nauta design partnership which has made these the very definition of modern mid-size cruising catamarans which can appeal to families and charterers alike.

Indeed the 450 marked the modern look of Lagoon and was the first with interior styling from Nauta. It originally launched over a decade ago as a flybridge design with central helming position (450F), before this ‘sport top’ option (450S) was offered with a starboard helm station and lower boom.

Fountaine Pajot Saona 47

The 47 has a modern shape, with straight bows and a reverse sheer line. It incorporates significant volume in the hulls below the bridgedeck to create room for the optional athwartships cabins. Cabin space is a prime selling point, particularly the owner’s suite to port, where there is also abundant natural light and headroom.

Photo: Tui Marine

Leopard Catamarans, together with designer Simonis Voogd and builder Robertson and Caine, produce the archetypal dual-purpose owner-operator or charter boat in their modern catamaran range.

Key features of the 45 are the amount of light in the saloon and the incredible volume and space on offer in the cabins above the relatively narrow waterlines. Vast social living areas include the flybridge, saloon and dual cockpits.

Nautitech Open/Fly 46

During the 1990s and noughties Nautitech earned a good reputation for its elegant catamarans. The 441 is a timeless example and the 44 can be credited with the ongoing trend in hardtop biminis. While its acquisition by Bavaria seven years ago helped Nautitech implement industrial build techniques, the French brand has retained its DNA at its Rochefort sur Mer yard.

The modern Marc Lombard designs have tall rigs with generous square-top mainsails. Twin wheels in the aft quarters of the Open 46 offer a direct feel on the helm, however those spending long periods in the tropics may prefer the shade of the bimini-equipped flybridge option. The layout is also open, with a saloon more outside than in. Styling is clean, modern and simple, and the standard of build and finish are good.

Photo: Olivier Blanchet

First impressions of the Neel 51 are sure to centre on its sheer size and space inside. But as you’ll see from our review of the Neel 43 on page 83, when you sail one overriding impressions quickly centre on its performance.

These trimarans are becoming a popular mass production-built option.

Photo: Christophe Launay

The Excess 11 packs plenty of potential as the smallest yacht offered by the big production yards. A little like the Lagoon 380 of old, it presents a good value new entry-level boat for genuine cruising in a more sporty, modern and enticing design. Some may argue against aft helms for ocean sailing, but those coming from monohulls will appreciate the more direct steering they offer.

Broadblue 385S

Broadblue is a UK brand which offers a distinct line of cruising and Rapier performance catamarans. Its staple 385 packs a lot of cruising comfort into its length, including generous tankage, and has been sailed all over the world. Broadblue built its first electric drive catamaran 12 years ago and offers the only all-electric production sailing catamaran under 40ft in Europe.

Photo: Christophe Breschi

Bali Catspace

For those looking for maximum volume within 40ft, it’ll be hard to beat the Catspace – although it is more of a holiday apartment than a traditional bluewater cruiser. Bali’s garage style sliding aft door does help offer an enormous amount of enclosed (or open) living space.

Best bluewater multihulls for luxury cruising

Photo: Nico Krauss

Privilège 510 Signature

The 510 is designed to take a serious amount of cruising gear – up to six tonnes of it in fact. The excellent helm station now has a fixed windscreen and all lines lead to hand. Finish quality including the electrical installation is first class and Privilege’s trademark, an admirable full beam (26ft) forward cabin, is sumptuous.

Photo: Jérôme Houyvet

Garcia Explocat 52

Garcia Yachts has cornered the market for series-built aluminium monohulls and multihulls in the last decade and this new Explocat 52 is sparking real interest. We ran a full test report in our February issue, describing it as a go-anywhere cat with an enticing combination of space, pace and rugged construction.

Read our review of the Garcia Explocat 52

Built in Argentina, the Antares 44 is the ultimate evolution of a model launched 21 years ago. Entirely dedicated to bluewater cruising, it is the yard’s only model and is constantly being improved according to owner feedback.

Time seems to have no hold on this boatyard and, against the trend, the standard equipment of the Antares 44 is extremely complete

Photo: Richard Langdon

Discovery Bluewater 50

This luxury Bill Dixon design may be a decade old now and into its third iteration, but the concept behind its original appeal remains. For those used to sailing high-end thoroughbred monohulls, here is an option to consider for a comparative level of build quality and fit out when moving to a multihull.

Read more about the Discovery Bluewater 50

St Francis 50 MKII

With this latest version of its original model, this experienced South African builder has optimised a catamaran cut out for the unforgiving seas of the Indian Ocean and the South Atlantic. The MKII allows for an increased load capacity, an important point in long distance cruising.

Xsquisite X5

Intelligent features on the X5 include the protected helm station with glass windscreen, integrated rainwater catcher, UV-protective glass and generous tankage.

Best bluewater multihulls for size & speed

Mcconaghy mc52.

The MC50 (now MC52) was the first and promises some high speed sailing, but it’s the open plan main living deck which will attract the majority. It incorporates an intelligent centreboard system, which hardly affects interior space, but arguably its exposed helms at the aft end of the flybridge will not suit serious ocean cruising.

Photo: Florian H. Talles

HH in Xiamen is building some really impressive large, luxury fast cats up to 90ft. This was its second model to launch, a high-end, high performance Morelli & Melvin design capable of rapid passagemaking speeds and enjoyable regatta sailing. Features include C-shaped boards and central or aft helms.

Photo: Mike Jones/Waterline Media

Ocean Explorer 60

If Nautor’s Swan made catamarans, they may look like this… The Ocean Explorer 60 uses the same designer in German Frers and some of the same builders who worked at the famous Finnish yard to produce this world cruiser. The resultant quality shines through. A new OE72 is due soon.

Kinetic KC54

A young company with plenty of experience, Kinetic produces custom fast ocean cruisers, which can occasionally race. Its 62 is a serious performance vessel with carbon hulls, rigs and rigging, daggerboards or centreboards. With fast bluewater cruising the goal, carbon is used to minimise weight so features/toys can still be added. The swim platform and hardware on the newly launched 54 weighs just 90kg, and the generous sized tanks are all in carbon too. Views from the saloon and forward cockpit also look special.

Best bluewater multihulls for ultimate performance

Marsaudon ts4/orc 42.

Few catamaran builders produce genuine performance cruisers at this ‘smaller’ size: this one is kept minimalist and light weight (around 6 tonnes) – the yard’s philosophy is ‘simplicity, then add lightness.’ The 42 is a cruiser-racer with the ability to outpace most yachts across the Atlantic, win a regatta and still offer some space for island hopping. Standard tankage is minimal however. Marsaudon recently rebranded its TS range to Ocean Rider Catamarans (ORCs) and has an ORC 57 in build.

Dazcat 1495

Dazcat builds fast, seaworthy cats from its Multihull Centre in Cornwall. The 1495 is a true ocean cruiser-racer, which is stiff and rewarding to sail, with direct steering linked to carbon rudders. The 1495 can hit 20+ knot speeds with relative ease, but it is the consistent high average speeds which will attract those looking to cover serious miles. Weight is centralised including engines, tanks, and systems all located amidships to help reduce pitching. Dazcat has a semi-custom build approach and creates all sorts of weird and wonderful craft for all abilities.

Dragonfly 40

Dragonfly trimarans are known for their high quality construction and ability to delight sailors with their ease of planing speeds. For those who can live without the space of similar length cats, the new flagship 40 is large enough to offer cruising space, while folding outriggers and retractable appendages mean you can dry out where others wouldn’t dare.

Looping 45/Freydis 48

These two designs by Erik Lerouge both offer a high-performance vision of ocean cruising. The Loopings were built individually and the Freydis in small series, and on both you can sail as fast as the wind in complete safety. Interior quality depends on whether finished by an amateur or by a shipyard.

Swisscat 48

An attractive combination of luxury, comfort and performance, the S48 is a stiff, go-anywhere premium cat that is easy to manage single-handed. The lightweight build (11t) is in epoxy infusion with carbon reinforcement.

Schionning Designs

Jeff Schionning has catamaran design in his blood. His designs exude performance and seaworthiness with flowing, even aerodynamic lines. On all tradewind routes you’ll find a G-Force (models from 12m to 23m) or an Arrow (12m to 15m) sailing more quickly than the rest. His latest venture is with Current Marine in Knysna, South Africa.

Best bluewater multihulls for pedigree cruising

The long-time best-seller from the world leader in catamarans, with more than 1,000 produced over almost 20 years from 1999. With its characteristic vertical windows, the 380 and its big brother the 410 made the purists scream when they were presented. But the 380 proved a pioneer of its kind. Safe bow volumes and light displacement (7,260 kg) helped its seaworthy behaviour. The high number of boats on the market makes this the most affordable bluewater cruising multihull for its size, even if price range is as wide as condition is variable.

Casamance 44/46

Between 44ft and 46ft depending on the year of construction and the length of its transoms, the Casamance was an impressive catamaran on launch in 1985. The design by Joubert/Nivelt offered good volume and load capacity. Of the 490 units produced, many joined the charter fleets. The exterior of the Casamance is dated, but the interior in grey ceruse oak has retained plenty of charm.

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PROA HULL DESIGN

The advantages of proa hull design.

Setting out with the goal of building the most efficient boats we could, our founder Larry Graf and his designers sought to create earth-friendly cruisers that would inspire a new generation of boaters. And because Larry and his team played a hands-on role in developing some of the world’s best catamarans, they had an idea of what a boat could be in terms of comfort, stability, and fuel economy.

When one looks at catamarans vs. monohulls, the starting point is clear. The many advantages catamarans exhibit when compared with monohulls are an excellent starting point. Catamarans offer a stable ride with predictable hull movement. The seakeeping is excellent, even in rough conditions. Another advantage the design provides: incredible onboard space. The space of a catamaran is often comparable to that of a monohull that is 25 percent longer. Catamarans also have been proven to provide efficient operation.

A Different Kind of Catamaran

The concept was formed, and extensive testing was done to both prove and refine the design until the hull form we have today was established and then patented.

The first boats were single-engine diesels, with all propulsion confined to the larger starboard hull. This hull has the appendages including a keel, prop, and rudder. The hull forms are hydrodynamically designed so that power on one side creates straight tracking when the rudder is centered. If it were not for this, and rudder was needed to make the boat track straight, the constant rudder movement would create additional drag. The proa hull form works efficiently with both inboard and outboard power. Performance and stability remain unmatched whether powered by a single diesel or two gas outboards.

The shape of the tunnels from fore to aft is also precisely crafted. The forward section is designed to cut through wave tops, when in extreme conditions, creating a slight amount of lift as the vessel enters the wave with no slapping. The water funnels back into the tunnel flowing evenly and exiting at the stern. This tunnel design keeps water flowing and reduces wave impact much better than the tunnels of other catamarans.

The wider starboard hull provides more space for the accommodations, and also makes it easier to access and manage the engine and machinery. The proa hull on the portside is 35 percent narrower, but its actual drag is reduced by approximately 50 percent due to fluid dynamics. A hull that is a little thinner maintains the buoyancy required to keep the boat running true but requires a lot less energy to move through the water. This makes a big difference in efficiency.

Our patented proa design for inboards uses just one engine, one shaft, one prop, one rudder, and one keel—half the typical engine appendage drag of a twin-engine design. The hulls are shaped to compensate for the engine torque. Since both fluid-dynamic and engine-torque forces are proportional to speed, the boat runs straight at every speed. Even better, the single-engine design saves dramatically on machinery weight, which in turn, saves on the required structural-component sizes and fuel needs, and their corresponding weight. This reduces the boat’s weight by around 44 percent. Less weight also equals much less drag. Thanks to solid engineering principles and innovation, our boats strike the perfect balance for the environment: comfortable and efficient.

A second round of innovation was conducted on the outboard-powered boats. Originally the second engine was to allow for a trolling motor, but testing and further refinement led to the two-engine configuration. By thinking even further outside the box, we created an asymmetrical installation that has not been seen previously: one 200-horsepower Yamaha on the larger hull, matched to a 70-horsepower outboard on the smaller hull. With the option to run on both engines or on the single larger outboard, or even just on the smaller outboard, we are able to see the advantages in efficiency.

Patent No. US 8,109,221 B2

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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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Six Amazing Boat Hull Designs

By Dean Travis Clarke
Updated: October 25, 2016

The American boating consumer bears a remarkable psychological profile when it comes to wants and needs.

A cursory glance at the lines of most boats proves that profiles haven’t changed dramatically over the past 60 or so years. Certainly, construction methods such as resin infusion and injection molding have altered business as usual, and ingredients have also changed to include all manner of space-age composites, epoxies, paints, computer mapping for engines that produces vastly greater horsepower from smaller blocks, and so on. Even propulsion has changed with the advent of pod drives and big outboards. But here’s the weird part: Any time a designer or builder introduces a model that looks significantly different, whether it is Euro-styled or functionally clunky, it fails. It doesn’t matter how well the boat performs, the typical boater rejects it because it doesn’t look like what he knows. We, as an enthusiast niche involving boats, are horribly set in our aesthetic ways.

Look at how well multihulls handle heavy seas. When it comes to seakeeping ability, efficiency and performance, the catamaran has a lot going for it, as anyone who happened to catch some of the most recent America’s Cup racing can attest. And yet, to date, production multihulls have enjoyed only moderate acceptance by boaters.

Here are six of the latest hull-design innovations and technologies being used elsewhere in the maritime world that we will likely never accept for our recreational boats — even though they all work well.

Wave-Piercing Hulls Most accounts cite wave-piercing technology as coming on the scene around the start of the 20th century. However, it has been employed as far back as the times of the Phoenicians and ancient Romans. The design concept consists of a bow with little buoyancy, a hull that slopes inward from the waterline and, ergo, a large reduction in wave-making resistance. While it works well in heavy seas, the drawbacks include reduced interior volume forward and a very wet ride because the waves come up and over the bow as a matter of course. Wave piercers fell out of favor for a period of time due to these same drawbacks but have recently enjoyed a resurgence of popularity because of their dramatic fuel-efficiency gains.

Stepped Hulls OK, this hull form has achieved a certain level of acceptance in our recreational boats, mostly in performance boats or offshore center consoles. But why isn’t it more popular? The stepped bottom has been around as a V-bottom refinement since at least 1912. Steps are grooves in the hull stretching outward from the keel to the chines. Most hulls sport one or two steps per side. And a vessel should really be capable of cruising in excess of about 30 knots for a stepped hull to be worthwhile. Steps work by allowing air to be “injected” against the running surface, breaking contact between part of the hull and the water, which in effect turns the running surface into numerous short, wide planes, rather than one long, narrow one.

How much the hull surface contacts the water directly determines the amount of drag a hull suffers. Steps (also called vents) decrease the amount of hull contacting the water (called the wetted surface), thereby decreasing drag, increasing speed for the same horsepower, and increasing fuel efficiency. It all sounds good. But steps also come with potential drawbacks. Though modern deep-V designs have enough deadrise to counteract the problem in most cases, stepped hulls have been known to suffer from transom slide in sharp turns at speed. They also require attention to loading and trim because the steps need the proper angle of attack to function correctly; they don’t offer an advantage in flat, calm water; and they require a special trailer.

Most owners of stepped-hull vessels are experienced and want to travel at high speeds in moderate to heavy seas, and/or achieve good economy and range. Yet to date, performance and center console builders aside, only Regal Boats, with its FasTrac hulls, and Formula have committed to using steps in production cruisers and sport boats.

Asymmetrical Twin Hulls This unique design concept comes from the drawing board of Larry Graf, the pioneer who put power catamarans on the map here in the U.S. when he founded Glacier Bay Boats in 1987. His new company, Aspen Powerboats, employs a cat design where one hull is narrower (35 percent) than the other. His patent calls it a Power Proa, and it relies on a single engine in only the wider of the two hulls. The hull shapes, alignment and placement compensate for the offset propulsion thrust, allowing the vessel to run straight and true. With only one set of running gear in the water, inherent appendage drag is reduced by 20 percent. Combined with the efficiency of the hull designs, overall fuel efficiency of the Aspen rises to an impressive 70 percent over monohulls of comparable size. Aspen won an award for the best 30- to 39-foot catamaran in the world in 2014.

SWATH A quick glance might lead you to believe that a SWATH (small waterplane area twin hull) vessel is a catamaran. And it is but only to the extent that it has two hulls in the water with a bridge across the top. But that’s where the hulls’ similarities end.

Consider a submarine. Once under the surface, it runs stable, with no roll or pitching from wave action. All that wave energy remains on the sea surface. That basically explains how a SWATH design functions.

If you’ve ever dived under a wave at the beach to avoid being smacked by it, you know that the water beneath the wave is calmer. SWATH minimizes a vessel’s volume where the water meets the air (which is where all the wave energy is at its peak). The bulk of the vessel’s displacement and buoyancy runs beneath the waves, affording amazing stability, even in big seas and at high speeds. Please think of high speeds as a relative term here, as this is not a planing hull. What SWATH does provide, however, are a wide, stable deck and unsurpassed ride quality, especially in rough seas.

Drawbacks to SWATH designs include the fact that each hull must be custom designed. Draft runs deeper than standard hulls (especially planing hulls). The underwater “torpedoes” providing buoyancy must run parallel to the water’s surface, which requires a fairly complex trim-control system. And the underside of the deck must be far enough above the sea surface to avoid waves slamming up into it. Finally, SWATH vessels cost more to design and build than conventional hulls.

Hydrofoils Once the strict province of commercial ferries and a few high-speed military vessels, the most recent America’s Cup has spurred hydrofoil acceptance to new heights. Will it catch on with powerboats?

The hydrofoil design acts exactly like an airplane wing, providing more lift than the drag coefficient the vessel produces, thereby lifting the entire hull out of the water. Only the hydrofoils remain in the water, unaffected by surface wave action. In fact, hydrofoils cut inherent resistance to zero while the hull is out of the water. In the case of power-driven boats, you still suffer drag from the propulsion system (prop, shaft or the like).

The most significant disadvantage to this system on recreational boats is definitely the deployment of the foils. Unless you want the added draft of these struts sticking down below your hull all the time, you must be able to extend and withdraw them — a complex engineering feat. There is at least one recreational powerboat employing hydrofoils: Twin Vee builds a catamaran with foils that don’t actually lift the hulls completely out of the water. It does improve fuel economy and ride stability nonetheless. Still, boats ride more smoothly in a sea and go much faster with hydrofoils. With the dramatic acceptance of this technology in sailing, is it only a matter of time before recreational powerboats incorporate foils into their designs?

Ulstein X-Bow The Norwegian Ulstein Group has been designing offshore vessels since 1917. Presently, it has the notoriety of creating the most advanced bow design in history. The Ulstein X-Bow looks like it might be upside down, but it’s proven itself in more than 100 offshore support vessels to date. The X-Bow allows higher speeds and smoother rides in even the worst seas. Gone are the slamming and vibration that occur when the bow of a ship drops off a wave. It functions better on all points of sea, and its lower hydrodynamic drag substantially decreases fuel consumption. The X-Bow has proven so successful that Ulstein is in the process of creating an X-Stern design now.

You won’t ever see this on small recreational boats, but you can nod knowingly when someone points one out on a mega-yacht in the near future.

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17 Best Catamarans for Sailing Around the World

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

The best catamarans for sailing around the world include:

The Fountaine Pajot Ipanema 58

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

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

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

Table of Contents

The Best Catamarans for Sailing Around the World

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

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

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

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

Antares 44i

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

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

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

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

Atlantic 42

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

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

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

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

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

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

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

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

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

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

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

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

Fountaine Pajot Belize 43

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

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

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

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

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

Fountaine Pajot Lucia 40

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

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

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

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

Gemini 105M

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

Nautitech 44

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

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

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

Outremer 45

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

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

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

Privilege Serie 5

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

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

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

Seawind 1000

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

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

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

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

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

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

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

What To Look For in a Long-Distance Cruising Catamaran

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

Size and Payload

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

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

Cabin Placement

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

Cockpit and Protection From The Weather

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

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

Buying Used?

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

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

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

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

Final Thoughts

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

Here are Some of My Favorite Catamaran Cruising Resources

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

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

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

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

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

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

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

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

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

Thanks Elisabeth I really appreciate the kind words 🙂

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

Best Catamarans

Even though many multihulls are no longer built in the United States these days, the Manta 42 is a true American-built catamaran that brings good living and good value into one package. Designed cleverly for easy handling, this American built catamaran is a great choice for a liveaboard cruiser for sailors looking to go for long-distance voyages. Thanks to its trademark high bows and an enormously curved incorporated forward crossbeam, this catamaran is easily recognizable even from a distance.

It is designed with a uniquely fixed crossbeam, which is very different from conventional aluminum cross beams that support the tension of the forestay. This fixed crossbeam allows for a little bit of movement thereby helping in absorbing enormous twisting forces of the bows. As such, you have to keep in mind that there may be resultant stress crack particularly in the bow area of the vessel.

All in all, the Manta 42 is a superb offshore cruising catamaran that offers a good sail-area-to-displacement ratio as well as plenty of space and accommodation. The cockpit area is refined, luxurious, and is designed with additional stainless pushpit contraptions to help in holding objects such as wind vanes, dinghies, and solar panels. The boat's quality in terms of performance and stability is the benchmark of what a catamaran should be.

Fountaine Pajot Elba 45

Recently named the "Boat of the Year" for 2019 by Cruising World Magazine and Sail Magazine, the Elba 45 is the latest model in the incredible line of Fountaine Pajot catamarans. This boat was designed to replace the outgoing Helia 44 and stands to be one of the most popular catamarans with Fountain Pajot having sold over 100 Elba 45 hulls long before even the first one emerged from production.

This French-built cat brings to the fore a well-thought-out, safe, and dependable features with 10% less drag, efficient motoring, top-notch performance, and high speeds. It's also designed with fixed stub keels and slightly aft-raked bows, which are all essential in enhancing windward performance; something that most catamarans struggle with.

To improve on safety, the keels of this amazing catamaran sailboat are glued into a particularly designed recess in the hulls. This is to ensure that there are no keel bolts that can rip out and put the boat in danger if the boat gets grounded or in the event of a collision. The rig is also ICW friendly and is a true representation of a standard catamaran setup.

This is, without a doubt, a modern-looking cruising catamaran that has a low-profile lounging space on its deck, high topsides and bows as well as a more pronounced reverse sheer that's essential in minimizing the bulk of the windows while creating additional and useful volume below. This is a true catamaran that occupies a sweet spot for those looking to sail along the bay or for those adventurous sailors looking to set sail for more ambitious offshore cruising plans.

With its fine design, straightforward systems, and easy handling, the Leopard 48 has everything it needs to be ranked among the distinguished category of the best catamaran sailboats. This is an excellent multihull that is structured with advanced materials, designs, and innovations that are meant to be fun, spacious, and comfortable.

Designed in South Africa by Simonis-Voogd, is probably the best design in the Leopard family of catamarans. Its two hulls are vacuum-bagged using balsa core to offer maximum firmness while ensuring that the weight is on the minimum. This is done by articulately regulating the level of resin in the layup. With such types of hull shapes, this catamaran sailboat is very fast and can consistently clock 12 knots of speed against the currents.

The boat is also designed with shallow keels as they're filled with closed-cell polyurethane foam that's of great importance in increasing buoyancy and preventing water ingress. To enhance the safety of the vessel, the stern and bow both have bulkheads that are essential in keeping out that water if the sailboat is involved in a collision.

The hulls of this boat are deep and narrow, particularly below the waterline. They also curve higher up to practically reduce the wetted surface area while offering enough deck space and plenty of room for accommodations. Its cockpit is another excellent feature thanks to its lavish spaces that give you the chance of kicking back and relaxing.

This boat is designed to offer superior livability, quick and easy to handle features, as well as enough space for friends and family. It is designed with beautiful lines and immense practicality for those who want to go on long cruising voyages.

Antares 44i

While many people often believe that voluminous cruising catamarans should be used as charter boats, the Antares 44i brings a very different perspective altogether. Designed in Argentina as a complete bluewater catamaran, this is a boat that's specifically built for private boat owners looking for a sturdy and well-equipped bluewater cruiser. This is an absolutely gorgeous catamaran that has a fully-equipped cockpit just to ensure that you can safely operate it even when shorthanded.

Like most catamarans, the Antares 44i is designed with features that allow for long-distance voyages. It comes with a minimum bridge deck clearance of 30 inches, which is essential in mitigating bridge deck slap. The helm station is designed to offer excellent visibility over the coach roof without having to perch the helmsman high above the cockpit.

If you're planning to make those long-distance cruising to exotic places, you'll appreciate this boat's layout. The galley is put down in the port hull so that it doesn't compromise the size of the galley and the saloon. The forward-facing navigation station is up there with the best and is up to offshore standards. And that's not all; the Antares 44i comes with good mounting points for electronics, a large table, comfortable seats, and provides brilliant visibility outside.

This boat is perfectly suited for extended offshore cruising and is a great reminder for anyone who thinks that all catamarans are charter boats and all offshore boats are monohulls.

Designed by Philipe Pouvreau in northern Brazil, the Dolphin Ocema 42 is a truly unique catamaran sailboat that goes against the conventional norm of catamarans. It is equipped with daggerboards, which are essential in enabling it to point higher on the wind while reducing the wetted surface when running or anchoring in shallow surfaces. This, however, requires a higher level of expertise in sailing. This is because lifting the daggerboards higher up will expose the rudders while the daggerboards can also interfere with the hulls in the event that the vessel runs aground.

But even with that, the Dolphin 42 balances incredible performance and cruising comfort in a very compact package; something that is not very easy in bluewater cruising. That's why it's designed using a foam core to make it lightweight by reducing weight wherever possible. This vessel will most likely never let you down if you want to circumnavigate the bluewater on a high-performance boat that is safe and comfortable.

So if you've been looking for a real sailing catamaran that doubles up as a very comfortable liveaboard sailboat , look no further than the Dolphin 42.

Regarded as the best built and most stylish cruising multihull, the Catana 50 is a very huge catamaran sailboat. Measuring about 50 feet long with a beam of about 26 feet, this is an amazing catamaran that will test your sailing skills as a single sailor or if you're planning to sail shorthanded.

This boat is designed with a rig that gives you the option of using either a screecher or a self-tending jib. This may seem complex since the sheets are led to winches near each wheel while all other controls lead to a centerline winch that's located in the cockpit. But even with that, this sailboat can be easily tacked once on the course.

This is a real performance-oriented catamaran with efficient hulls and rigs allowing for top speed. This vessel is also designed with a long waterline and a subtle underwater shape at the bow to help in increasing volume while minimizing wave drag. The stern platforms can help in stretching the waterline length while also providing easy access from a dock or a dinghy. The board trunks are also very strong and sturdy to protect the integrity of the hulls if a collision occurs.

In essence, this is a very modern catamaran that's designed to safely make long-distance passages with ease. It is subdued in terms of styling but this doesn't mean that it falls short as far as performance is concerned.

Atlantic 42

Designed in 1993, the A42 has cultivated a legion of fiercely loyal fans thanks to its efficiency and aesthetic. This is the smallest of the Atlantic cruising catamaran line and is hugely popular with sailors thanks to its ease of handling, ocean-going capabilities, and superb use of space. From the forward cockpit, pilothouse to the sleeping cabins, and brilliant galleys everything about this cat is a true classic.

Unlike most catamarans, the Atlantic 42 is designed with a waist-high cockpit that's located forward of the pilothouse just behind the mast. It brings forth a solid construction thanks to the large metal girder-like bearers that run across the bulkheads. This helps the vessel in having the utmost strength, better air circulation under the engine, and a high level of flexibility as far as the size of the engine and its positioning is concerned.

Initially, the boat's style and its outlook were considered conservative but it soon became clear that it is built of high-quality materials and to last. The internal construction of the boat is impressive, to say the least. The exterior looks very beautiful and perhaps much more beautiful than most boats today. Its large aft cabin accommodation is a top drawer while the space separating en suite heads and shower compartments are considered a bonus.

If you were to board the French-built Fountaine Pajot Bahia 46, you'll agree that the high-quality of workmanship, layout, and efficient use of space is quite exciting, to say the least. This cat remains very popular among sailors thanks to its easy handling features and incredible performance under the sails. Well, this may not come as a surprise to many of us given that the Fountain Pajot is known for building some of the most remarkable cruising catamarans out there that it can be quite overwhelming to narrow down to a single vessel, but the Bahia 46 simply stands out.

This vessel is designed with hulls that are broader than those of many other catamarans. It's also designed with centerboards and daggerboards that are meant to enhance its performance. These are essential in minimizing draft while ensuring reliability, generous bilge, and in helping to protect the rudders and propellers.

This boat is big enough to manage any type of serious offshore sailing. This is one of the best cruising catamarans for anyone looking for the right vessel for long-distance sailing. This vessel has a very more generous rig than most cruising catamarans, which is essential in enhancing its performance. The six-post Bimini is very strong and clean and can perfectly hold dinghies.

In terms of its look, the Bahia 36 is designed with gorgeous lines with the deck and hulls sculpted with lines that add a touch of elegance to the overall look of an already excellent catamaran sailboat.

Gemini 105MC

Whether you're looking for a comfortable catamaran vessel to take you for a weekend sailing trip or a long sabbatical vacation on the oceans, the Gemini 105MC is a very satisfactory liveaboard catamaran vessel that offers spacious accommodation, thoughtful design, and a stable cruising platform for anyone who wants to have some good time on the water.

Designed by the legendary Tony Smith, this is somewhat a sailing cottage. Like a land cottage, it is cozy, comfortable, and very safe. This is essentially a 35 feet catamaran that offers great value for any sailing looking for a reasonably-priced catamaran sailboat for the weekend or holiday cruising.

This boat is designed with incredibly slim hulls, which are teardrop-shaped with flat bottoms and smaller wetted surface area. This is to ensure that drag is minimized and to lead to more leeway under sail. Each of the boat's hull is designed with a kick-up centerboard is of great importance in enhancing the vessel's windward pointing capability. This boat also has its rudders raised to enable it to seamlessly cruise in shallow waters where most vessels would otherwise run aground.

The eccentric narrow beam, which measures about 40% of the boat's length, is very different from today's 50%. However, its low center helps in keeping its stable, upright, and of course, safe.

Lagoon 450 F

If you're looking for a catamaran sailboat that offers prestige at its peak, look no further than the Lagoon 450. This cat is widely known for offering an all-around comfort without compromising its beauty, spaciousness, class, and elegance. This is an elaborate French catamaran that brings to the table fantastic craftsmanship while leaving nothing to chance.

This is a very safe 45 feet catamaran that's not just comfortable but also very luxurious. The deck layout is centered on an amazing flybridge, which has been redesigned and redefined to offer both the traditional and modern outlook. You can very easily access the bridge, engine controls, steering station in a matter of seconds. As a result, this boat is efficiently designed to give you the ultimate control of almost every situation while on the water.

The spacious and luxurious interior of this boat is worth experiencing. The cabins and saloons are perfectly lit. We're talking about four to six cabins, eight to twelve berths, and up to four bathrooms. In essence, this boat can comfortably sleep eight to twelve people. This boat is designed to offer ultra-modern accommodations and amenities that come with little but amazing touches; all designed to make your life inside the catamaran enjoyable.

An original performance catamaran cruiser from the iconic Gunboat manufacturer, the Gunboat 62 has truly cemented its place as one of the best catamaran sailboats to ever grace the oceans. Honestly speaking, this cat-inspired a whole range of other incredible boats including HH66 Catamaran and the Balance 526.

This is a boat that can perform admirably well in storms with a speed of over 35 knots despite being built using epoxy and E-glass with carbon-fiber structural components. It's designed with a distinct angular outline than most catamaran sailboats of its size and category. This is a vessel that was built for people looking to add more stuff and more gear for their voyages. In other words, you can have all the gear and equipment on this boat and still outperform a racing monohull of the same size.

Thanks to its lightweight feature, this vessel can sail upwind at speeds of over 17 knots and pinch up to 30 degrees. Just for comparison, the Gunboat 62 can tack through 95 degrees and still outperform the best racing monohulls. This boat is designed with a comfortable helm seat that offers 360-degree visibility as well as plenty of storage space, a functional working surface, and a luxurious cabin. Like many performance catamarans, the Gunboat 62 can attain about 20 knots if the conditions are right.

Privilege 615

Combining elegance, comfort, and style, the Privilege 615 is a lovely catamaran sailboat that seems to be always ready for a long offshore voyage. The roots of this incredible cat can be traced back to the 1980s when Philippe Jeantot opened up a boat-building company in France. As one of the best productions from the company, the privilege 615 sports a flybridge that comes complete with twin wheels, a sprawling sunbed, and other excellent features that will make your bluewater cruising a breeze.

Whether you want the charter version or a privately-owned version, the Privilege 615 is one of the most versatile catamaran sailboats. Step inside this vessel and you'll instantly notice the quality of the wood finish and the elegance of design. The advanced navigation station is not only ultra-modern but is perfectly stationed at a dedicated corner where you can control everything while still having a conversation with your friends and family.

This boat comes with multiple sleeping configurations to ensure that you and your guests can live aboard the boat for months on end. Although the boat appears like some sort of maze on the inside, you'll easily get used to it when you enter the forward section. That's not all; this boat has gorgeous lines that make the exterior beautiful just like the interior. Its sleek profile, incredible volume, and versatile interior make it one of the best catamaran sailboats out there.

There you have it; these are the best catamaran sailboats out there. It doesn't matter the one you choose, these cats will make your day out on the water and will serve you just right for your offshore voyages or for day sailing along the bays.

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

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The Ultimate Guide to Choosing Between a Sailboat or Catamaran for Your Sailing Adventures

C hoosing between a sailboat and a catamaran for your sailing adventures is a significant decision that depends on various factors, including your sailing preferences, experience level, budget, and intended use. Here's an ultimate guide to help you make an informed decision:

1. Sailing Experience:

Sailboats: Typically require more skill and experience to handle, especially in adverse weather conditions. Ideal for sailors who enjoy the traditional feel of sailing and are willing to invest time in learning and mastering the art.
Catamarans: Easier to handle, making them suitable for beginners. The dual-hull design provides stability, reducing the learning curve for those new to sailing.

2. Space and Comfort:

Sailboats: Generally have a narrower beam and less living space. However, some sailboats may offer comfortable cabins and amenities.
Catamarans: Wider beam creates more living space. Catamarans often have multiple cabins, spacious saloons, and expansive deck areas, providing a more comfortable living experience.

3. Stability:

Sailboats: Monohulls can heel (lean) while sailing, which some sailors enjoy for the thrill but can be discomforting for others.
Catamarans: Greater stability due to the dual hulls, providing a more level sailing experience. Reduced heeling makes catamarans suitable for those prone to seasickness.

4. Performance:

Sailboats: Known for their upwind performance and ability to sail close to the wind. Some sailors appreciate the challenge of optimizing sail trim for efficiency.
Catamarans: Faster on a reach and downwind due to their wide beam. However, they may not point as high into the wind as monohulls.
Sailboats: Typically have a deeper draft, limiting access to shallow anchorages and requiring deeper marina berths.
Catamarans: Shallow draft allows access to shallower waters and secluded anchorages, providing more flexibility in cruising destinations.
Sailboats: Generally more affordable upfront, with a wide range of options available to fit different budgets.
Catamarans: Often more expensive upfront due to their size and design. However, maintenance costs may be comparable or even lower in some cases.

7. Mooring and Docking:

Sailboats: Easier to find slips and moorings in marinas designed for monohulls.
Catamarans: Require wider slips and may have limited availability in certain marinas, especially in crowded anchorages.

8. Intended Use:

Sailboats: Ideal for traditional sailors who enjoy the art of sailing, racing enthusiasts, or those on a tighter budget.
Catamarans: Suited for those prioritizing comfort, stability, and spacious living areas, especially for long-term cruising and chartering.

9. Resale Value:

Sailboats: Generally have a more established resale market, with a wider range of buyers.
Catamarans: Growing in popularity, and well-maintained catamarans often retain their value.

10. Personal Preference:

Consider your personal preferences, the type of sailing you plan to do, and the kind of lifestyle you want aboard your vessel.

In conclusion, both sailboats and catamarans have their advantages and disadvantages. Your decision should be based on your individual preferences, experience level, budget, and intended use. If possible, charter both types of vessels to experience firsthand how they handle and to help make a more informed decision based on your own preferences and needs.

The post The Ultimate Guide to Choosing Between a Sailboat or Catamaran for Your Sailing Adventures appeared first on Things That Make People Go Aww .

Choosing between a sailboat and a catamaran for your sailing adventures is a significant decision that depends on various factors, including your sailing preferences, experience level, budget, and intended use. Here's an ultimate guide to help you make an informed decision: 1. Sailing Experience: 2. Space and Comfort: 3. Stability: 4. Performance: 5. Draft: 6....

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The 10 Best Explorer Yachts for High-Seas Adventures

A 350-foot gigayacht or 60-foot cruiser size isn't what defines an explorer yacht. the devil's in the details when it comes to authenticity., julia zaltzman, julia zaltzman's most recent stories.

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Unlike fashion trends that seem to move as fast as a Redbull F1 car, the yachting industry takes its time adopting new ideas. There seems to be one exception. Explorer vessels, born out of the owners’ desires to go farther and stay longer, without sacrificing creature comforts, is developing with some urgency.

Several dozen builders and designers are now focusing on explorers, but they are also consulting with adventure travel firms that have a long history of using expedition yachts in remote parts of the globe. ICON Yachts, for example, collaborated with Cookson Adventures and the International Seakeepers Society on its Project Mission in both the overarching design and the details found across the yacht. Adventure outfitter EYOS employs its expertise routinely with Damen’s explorer vessels, most recently with the 190-foot Pink Shadow. EYOS has a list of 50 features that separate authentic explorers from faux versions that might look the part but lack the necessary infrastructure and design elements.

Long-range cruising, system redundancy for autonomy at sea, and storage to carry specialist equipment like submersibles are some of the requirements that define expedition boats. There’s also deck configuration for the easy launch of tenders and toys, along with strong, ice-class hulls and climate-controlled areas comfort in extreme polar and tropic regions.

We culled through the latest fleet of explorers with multiple lengths and designs, selecting a single feature that we think makes it best in class. Here are 10 of our favorites.

Best Pilothouse: Doggersbank 77 Offshore

More than 700 Doggersbank motoryachts have been built since the 1960s, with the latest model scheduled for delivery in 2025. The robust, offshore vessels are designed by Dutch studio Vripack for long ocean passages, assisted by a high, flared bow. “It prevents green water from hitting the wheelhouse windows in rough seas, and together with the Portuguese bridge, ensures the captain’s view is not obstructed,” Joost Mertens, Doggersbank fleet manager, told Robb Report . “The yacht’s steel hull ensures the yacht sits better in the water making it less vulnerable to wind and high waves.”

Best Deck Configuration: Columbus Crossover 42

The Columbus Crossover 42 is defined by both straight and angled surfaces, tapered stern sections and a concentration of volume in the bow that is becoming on many explorers. What is atypical is the yacht’s compact but flexible dimensions that accommodate a large cockpit tender and a 108-square-foot swimming pool with relaxation areas. Sold to an U.S. customer, it’s scheduled for delivery in 2025.

Best Multipurpose Stern: Bering B165

Turkish boatbuilder Bering Yachts revealed details of its new 162-foot flagship explorer yacht, the B165 , at the Dubai International Boat Show in March. The yacht can carry 18,400 gallons of fuel, which the builder says will give it a 4,000 nautical mile range when cruising at 12 knots. It also has a 2,640-gallon holding tank. What singles the B165 out among other explorers, however, is its multi-purpose stern area for both function and form. The elongated aft deck has a swimming pool surrounded by sunbeds. When the bulwarks are folded down, the space becomes an even larger overwater terrace. When the pool is not in use, it can be used as a covered storage area for water toys and expedition equipment. The yacht’s two tenders are also stored on the aft, making it a flexible space for both equipment and guests.

Best Family-Friendly Concept: Project Mimer

This 197-foot expedition concept by Tillberg Design of Sweden caters to family travel with a helicopter pad as well as multiple tenders and toys. It’s pitched by the studio as an introduction to true explorer yachting. It has a functional crew layout for efficient operations and an upper deck owner’s suite with a forward terrace and spa pool. With a hull that will be built to the Polar Code Category, the concept also has an optional helipad aft and long list of toys, from an electric luxury tender and two expedition RIBS to quad bikes, a submersible, Jet Skis, and, of course, an amphibious vehicle. The five-decked yacht sleeps 12 guests with crew quarters for 17 and an additional staff member, such as a nanny.

Best Ice Explorer: Damen SeaXplorer 105

Damen’s 345-foot SeaXplorer 105 is the largest model in the SeaXplorer range, with exterior design by Azure Yacht Design. The platform was developed under the guidance of expedition specialists EYOS Expeditions, who considered over 150 design criteria, from the hull form and bridge layout to the tender davits and Zodiac boarding arrangements. But it is EYOS’s expertise in the polar regions—it facilitated the first heli-ski charter in Antarctica and the first 3,200-foot sub dive to the Antarctic midnight zone—that gives the vessel its point of difference. The SeaXplorer has an ice-strengthened hull and a specially shaped icebreaking stern to maneuver through rough terrain.

Best Interior: Project Fox

On top of having a cool name, Project Fox has a bright, contemporary interior, courtesy of London’s Q Design, that is becoming more common on expedition yachts. The full-beam owner’s stateroom is also one of the yacht’s standout features, with its marble en suite and hardwood floors. The salon is also luxe, with white walls that brighten up travel even in areas that are sunlight deprived. Project Fox also has four other staterooms.

Best Autonomy: Project Master

ICON Yachts’s Project Master was a transoceanic offshore support vessel before the Dutch shipyard began a refit to turn it into an explorer yacht (see before and after inset). It’s equipped with diesel-electric hybrid propulsion, a wide beam for multiple tender spaces, a 7,200-nautical mile range, and flexible cabin arrangements for expedition crew. Other features include a science lab and a certified heli-deck. “The yacht’s helicopter and sub capability mean it can offer assistance in areas with challenging access and little infrastructure,” Micca Ferrero, owner of ICON Yachts, told Robb Report . “The design is for the demands of self-sufficient voyages.”

Best Use of Volume: Arcadia Yachts A96

The A96 mixes the lines, volume, and open-plan layout of Arcadia’s Sherpa series with the speed, joystick maneuverability, and quality of the yard’s A range. It’s the first Arcadia to have an Igor Lobanov-designed interior, as well as a high bow and high deckheads for traversing rough water. But its big differentiator is the 214 gross tonnes of volume and 24-foot beam that generate big volumes—4,300 square feet of usable space, which is 30 percent more than on other similar-sized yachts. Low bulwarks and lateral walkways emphasize the sense of openness.

Best Bow: Project Shackleton

This 351-foot build from Lürssen has an inverted bow that looks like an eagle’s beak. The shape is designed to slice through waves with much lower vibration through the hull, while also reducing rock and roll in rough seas. Unlike the quasi-research vessel exteriors of many explorers, this vessel is representative of the changing look of many in this growing segment.

Best Multi-Mode Hull: Azimut Magellano 60

The Magellano 60 isn’t technically an explorer yacht. Think of it as a cruiser designed for some long-distance travel. But it does have one very interesting feature, what its builder Azimut calls a “dual-mode” hull. The semi-planing shape is designed to optimize fuel consumption (and therefore lower emissions) by about 20 percent (compared to similar-sized vessels) at low and medium speeds. The yacht’s bow is also designed to cut through waves for better seakeeping at a range of speeds. The boat cruises very efficiently at 18 knots but will hit a top end of 26, thus delivering the performance of a planing hull with the benefits of a displacement hull.

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Semi Displacement Catamaran Hull Design in 2022
World's largest sailing catamaran design to be presented at SCIBS
Lazzarini Design Studio Has Announced New a Catamaran Concept
Multihull Design Blog
52 foot Aluminium Cruising Catamaran
Semi displacement catamaran hull design ~ Joe's bayou boat ramp

VIDEO

Bali CatSmart Aft Deck #walkthrough
Bali Catamarans #CatSmart Layout Proposal 14, Still renders 221212 Please bring them back!
The Best Performance Inflatable Catamaran Boat
ENG: Boats: Ocea catamaran workboats for aquaculture and fishfarming
Designing a camping catamaran, calculations #256
This Boat Was Huge WorldCat With SEAKEEPER Feature Atlantic City Boat Show

COMMENTS

Catamaran Hull Design
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.
Catamaran Hulls- Everything You Need To Know
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.
Boat Hull Shapes: What Hull Shape is Best?
Catamarans As one of the oldest hull shapes (imagine two logs tied together), catamarans occupy a small niche in America and larger niches in some other areas of the world. Using two hulls bridged by a deck, the catamaran design provides additional beam, increased stability and, at the same time, increased speed (the slim twin hulls have little ...
Optimising Hull Lines for Performance
A third number that we can plug in as a constant if we want to is the prismatic coefficient which describes bow much volume there is end the ends relative to the cross section shape in the middle of the boat, but in sailing boats this is of less importance compared to other factors. The hull lines for Design 256, 8.5m Cat.
How To Create the Perfect Cruising Catamaran Layout
Get the Best Catamaran Hull Design. A cruising catamaran's performance depends on three main aspects; its length, the sail area, and the boat's weight. Long boats are generally fast. A light boat with more sail area is also faster than a heavier boat with less sail area. In other words, you can make a multihull faster by making it longer ...
CATAMARAN DESIGN: How Hull Volume & Bow Shape Affect ...
In the third part of our series, we talk again to Antoine Richer, the Naval Architect at Seawind about how bow shape, hull volume and freeboard affect the pe...
Best catamaran and multihull: We sail the very best yachts on two and
The result is telling on the water, as it should be for any best catamaran contender, where you can log easy miles: we clocked late 7s upwind, reached in the late 8s and regularly averaged 9 knots ...
Catamaran Design Guide
No, the hull floor of a catamaran is not always on the waterline. The design of a catamaran allows for the hulls to be elevated above the waterline, reducing drag and increasing speed. The position of the hulls in relation to the waterline can vary depending on factors such as the weight distribution, load, and sailing conditions.
The best bluewater multihulls of all time: a complete guide
Lagoon 380. The long-time best-seller from the world leader in catamarans, with more than 1,000 produced over almost 20 years from 1999. With its characteristic vertical windows, the 380 and its ...
The Patented Power Proa Hull Design
Catamarans offer a stable ride with predictable hull movement. The seakeeping is excellent, even in rough conditions. Another advantage the design provides: incredible onboard space. The space of a catamaran is often comparable to that of a monohull that is 25 percent longer. Catamarans also have been proven to provide efficient operation.
DIY Cruising Catamaran: Complete Building Guide
If you were to build a 40-foot (12.1-meter) catamaran, your cost of materials would range between 20-30% of the total cost. Therefore, for $300,000 total, the boat's materials would range between $60,000 and $90,000. The hull tends to range between 15-35% of the total build.
Power Catamarans: A Complete Guide
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.
15 Best Catamarans in 2024
A catamaran is a sailboat that has a multi-hull design. It gives it more stability because it's wider and that creates more livable space for more people. ... 2022 saw the Xquisite X5 named the Cruising World magazine's Best Cruising Catamaran of the year - yet again (it won the Best Multihull over 50ft award in 2017) . As Ed Sherman said ...
The 7 Best Superyacht Catamarans, From Solar-Powered to Explorers
Windelo 50. Equipped with an electric-hybrid drive system, as well as both solar panels and hydr0-generation technology to top up battery power, the French-built Windelo 50 Adventure can reach ...
Six Amazing Boat Hull Designs
With only one set of running gear in the water, inherent appendage drag is reduced by 20 percent. Combined with the efficiency of the hull designs, overall fuel efficiency of the Aspen rises to an impressive 70 percent over monohulls of comparable size. Aspen won an award for the best 30- to 39-foot catamaran in the world in 2014.
17 Best Catamarans for Sailing Around the World
The Best Catamarans for Sailing Around the World A catamaran is a double-hulled boat with a deck or cabin area in between (bluewater cat definition in this article).The double hull design means that the boat rocks less, sits higher on the water, uses less fuel to sail, and can be sailed in shallower waters than a single-hulled boat without worrying about grounding.
12 Best Catamaran Sailboats
Gunboat 62. gunboat_catamarans. An original performance catamaran cruiser from the iconic Gunboat manufacturer, the Gunboat 62 has truly cemented its place as one of the best catamaran sailboats to ever grace the oceans. Honestly speaking, this cat-inspired a whole range of other incredible boats including HH66 Catamaran and the Balance 526.
The Ultimate Guide to Choosing Between a Sailboat or Catamaran ...
Catamarans: Easier to handle, making them suitable for beginners. The dual-hull design provides stability, reducing the learning curve for those new to sailing. 2. Space and Comfort:
The 10 Best Explorer Yachts for High Seas Adventures
Whether it's an ice-class hull, a massive stern, or a conversion, these explorer yachts are the best entries for high-seas adventures. The 10 Best Explorer Yachts for High Seas Adventures
Best 15 Landscape Architects & Designers in Elektrostal ...
Best for larger-scale projects like designing a large garden or dealing with challenging terrains. Specialize in creating master plans for big properties, integrating features like water elements, outdoor structures, and extensive plantings. Have a deep understanding of design principles, construction techniques, and environmental considerations.
Best 15 Landscapers & Landscaping Companies in Elektrostal ...
They may also provide design services on their own. After everything has been installed, landscape companies can make adjustments, maintain plantings, take care of weeds and pests, and perform other tasks to keep the scheme looking its best. A licensed Moscow Oblast landscaper should have detailed knowledge of Elektrostal', Moscow Oblast ...
Best 15 Deck Builders & Contractors in Elektrostal', Moscow ...
A functional deck design and patio layout is dependent on meeting your specific needs, so it's a space that needs to be created carefully. Luckily, there are professionals to handle your deck installation or patio design — hiring local Elektrostal', Moscow Oblast, Russia deck builders or patio installers is your surefire ticket to creating an ...
Best 15 Design-Build Contractors & Firms in Elektrostal ...
Search 811 Elektrostal' design-build contractors & firms to find the best design-build contractor for your project. See the top reviewed local design-build contractors in Elektrostal', Moscow Oblast, Russia on Houzz.