New Designs in the Pipeline

A Range of elegant Power Cats with options of Diesel, Electric and Hybrid Drive Systems

Details coming to the web site soon


Details coming to the news page soon.

Design Technology

No one thought of putting wheels under travel luggage………until someone did!

No one thought of putting a canoe body under what would otherwise be a narrow planing hull until in the 1980's Malcolm Tennant did. Look for an article on how this has transformed the design of hulls for displacement power cats.  Coming to the LAB soon.

Warmer Waters and a fresh Chain of Command for Australia's top Racing Boat

Above; Ullman Sails on her way to winning Airlie Beach Race Week 2019. 

She's was christened Carbon Copy, later to be known as Mad Max and then Ullman Sails. She has dominated the Australian inshore racing scene for several years and still holds the title of the Australian Multihull Championships.


Having won just about every race that can be sailed in Australia in daylight hours, she's heading for new waters, a new owner, and a new crew. A more detailed report coming soon.


Self educated in the art of creating water borne projectiles with quite a bit of credit due to C A Marchaj and Douglas Phillips-Birt.


What we do would not be possible without the masters we work with in boat building, sailmaking, rigging, engineering, and all the other skills that help to bring our designs to life.


And many thanks to the sailors who take out boats to some of the exotic locations on the planet, and to the racing skipper and crews who sometimes drive the boats to levels of performance I never imagined was possible.



Dan has a history in boats that includes spending a year with his family living aboard a cruising cat to racing in skiffs and dinghies and cruising the Whitsunday Islands in his 16' Calyspo cat. He has recently been working hands on with Jamie Morris on the Construction of the R42 trimaran on the Australian Gold Coast.

 Dan has a degree in Engineering at the Australian Maritime College in Tasmania specialising in Naval Architecture. His expertise encompases modeling, draughting, engineering and pretty much all aspects of the design process.


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Call Tony Grainger

International Phone: ++ 66 8 6275 2480

Mobile in Thailand : 08 6275 2480

email to arrange a Skype call.

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Please note we run on Indochina time which is UTC + 7 hours. 

Phone calls 7am to 6pm our time please.


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Looking for a builder, equipment, professional marine services, or some indicative pricing for your project? Check with the listings in Partners Network for quality equipment and advice from people who understand multihulls and are familiar with our designs.

The LAB is a space where we explore a range of topics relating to multihull design, performance, construction, technology, seamanship and pretty much anything that comes to mind. Check it out here.

Setting out on a new build project and need some advice on construction methods, materials, or techical topics like secondary bonding? The guide is a primer for your project. You can find it on this link.