The Multihull Centre Foss Quay Boatyard Millbrook, Cornwall Tel: 01752 823900

Welcome to Powercat Catamarans

The UK's Multihull Specialist

Hull Types

Benefits of a Powercat

There are three major catamaran hull designs, each yielding a different ride. The basic fundamentals of the hulls remain the same across all three types, but subtle variations between them give each design unique advantages and disadvantages.



If you have the need for speed, then planing catamarans are for you. By employing a flatter V-bottom surface, these boats get on plane quicker for maximum speed. That speed comes at a cost, however: because of the flat surface of the hull bottom, planing catamarans tends to have more of a slamming effect when coming down. However, since catamarans are inherently more stable than other designs, this effect isn't nearly as severe as it is in a mono-hull, but it's still very noticeable when compared to other power cats. There is also a problem with lateral movement, which can be overcome with the use of trim tabs.



Semi-displacement catamarans are truly the best of both worlds. The wide oval bottoms of these hulls provide the best lift, stability, and load bearing capability. Greater buoyancy allows for higher horsepower ratings and the best balance of comfort and efficiency. There is very little lateral movement, and no enhancements are needed to make this hull design perform. It has the widest footprint in the water, offering the best stability and speed to comfort ratio. The design allows for large fish boxes, deep storage in hulls and maximum usable space. The fuel efficiency and range is unmatched, making it a great choice for the serious offshore fisherman or pleasure boater.

Full Displacement


For maximum comfort in heavy seas, you need a full displacement catamaran, which features a tall and narrow hull. This design offers most seaworthiness in rough conditions, offering a more responsive behaviour, a deeper hull, less beam, and a larger range of positive stability. However, the narrow hull does not allow for maximum load capacity, and has more lateral movement than other designs. There is also considerably more vertical movement at rest than other designs due to narrower hull design. Maximum horsepower ratings are lower due to hull speed and ability of narrow hulls to hold weight.

One vs Two Hulls

Greater stability, greater capacity, and greater efficiency


For thousands of years, fishermen have known that nothing beats a twin hull in rough water. Here are just a few reasons why the twin-hulled power catamaran design offers numerous advantages over traditional monohulls:


  • Because it doesn't pivot on the centerline like a monohull, stability is much greater in a catamaran. As It rises out of the water on plane, it remains stable.


  • The wider footprint of the cat negates the effect of rolling seas.


  • Driving a cat is more like driving a sports car than a motorcycle: turns are flatter and more stable than the leaning action of a monohull.


  • No-wake zones are not a problem for cats: their long, slender hulls produce minimum wake at all speeds.


  • The catamaran design allows the boat to drift sideways, so you can fish off the side. And when fish off one side, there's no worry about the extreme listing of a monohull.


  • Get access to areas that conventional hulls can't reach, thanks to the shallow draft of the catamaran design provides.


  • The twin-hull design of a cat means there's less rocking than a v-hull in a beam seam.


  • The relatively rectangular design of the cat's expanded deck area allows for more room and greater load capacity.


  • Unlike a monohull's deck, a catamaran's deck is parallel to the water at all speeds, allowing you to maintain your line of sight and giving you greater fuel efficiency.


  • Monohulls are designed to plane at a particular speed and weight distribution. As weight increases and/or speed decreases, the stern settles, creating untrimmed conditions.


  • As the boat pushes forwards, it creates a "hill" of water. In this bow-high position visibility is limited and the hull bottom is pounded. However, a cat avoids this condition, rising and falling evenly in the water as speed and/or weight distribution adjusts.


What are the benefits of a powercat over a monohull?


  • Efficiency –  The hulls on a catamaran are finer (thinner) than those of a monohull and provide far less resistance travelling through the water. Powercats accelerate smoothly with no hump to get onto the plane, meaning it is possible to travel at any speed to suit conditions and maintain fuel economy.


  • Comfort – Powercats provide an exceptionally soft ride; fine bows cut into the waves and the unique hull shape gently lifts the boat, enhancing the air cushion effect between the hulls. This prevents bone-jarring slamming and mitigates the effects of Whole Body Vibration.


  • Safety – With quick-draining decks, built-in buoyancy and sturdy construction Powercats can tackle conditions that have other boats heading for home. A twin engine installation provides plenty of power in reserve and, with fully independent electric and fuel systems, serious get-you-home capabilities.


  • Stability – For thousands of years, fishermen have known that nothing beats a twin hull in rough water. The twin-hull buoyancy is situated at the sides of the boat, which means there is little lateral rolling movement, even with the sea on the beam, and passengers can move around the boat without it heeling over. Size for size, Powercats offer more usable deck space for passengers and kit.


  • Sea Keeping –  The original Powercats were built for use in the unpredictable water the Isles of Scilly, where Atlantic weather systems, ocean swell and local tide races combine to throw up extraordinary sea states. Their rough water capability is renowned.


  • Shallow Draft –  The Powercat hull design enables safe operation in shallow waters, where navigation in narrow channels is essential, and in rivers and estuaries. Landing at, and pulling away from, a beach is also easily achieved.


  • Low Wash –  The hulls of a catamaran produce less wash than a monohull, significantly reducing the hazard to other small boats and sailing vessels, and in rivers and estuaries where erosion and wildlife disturbance are undesirable.


  • Manoeuvrability –  Powercats track comfortingly straight at speed, as if they are on rails, due to the twin hulls, with no tendency to broach on a wave. Using the twin engine controls at low speed will easily turn the boat on the spot, without touching the steering wheel, making boat handling in confined spaces (e.g. marinas) quite simple.


  • Versatility –  Powercats’ unique combination of abilities make these craft an excellent choice for commercial and leisure activity boating. Boats across the range are supplied for work and patrol boats, safety and rescue vessels, dive support boats, water taxis, survey vessels, fishing and angling boats.


  • Adaptability –  Boats in the Powercat range are available with a wide choice of consoles, helm stations, seating and lockers, and have been adapted with access doors, bow ramps and other features for disability and special requirements.




Foss Quay, Mill Road



PL10 1EN

United Kingdom

Tel: 01752 823900




Opening Times: By Appointment

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