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Wednesday, January 15, 2020 

DNV GL has been assisting a team in Western Australia with the design and construction of what is said to be the largest all-aluminium trimaran superyacht, the 'White Rabbit Golf'.

The 2,940gt 84m trimaran superyacht has been designed by One2Three Naval Architects, which was responsible for one of the owner's previous vessels, a 60m trimaran named White Rabbit Echo. One2Three MD Steve Quigley said: “We didn’t think twice when recommending DNV GL as the classification society of choice to the owner and shipyard because of our long-standing relationship and proven track record in bringing ambitious engineering challenges to fruition together as a team.”

The vessel's propulsion system comprises geared electric motors by Norwegian manufacturer Stadt. powered by Cat gensets. Builder Echo Marine points out that Australia is something of a pioneer in aluminium ship construction, and this record is recognised by DNV GL.

DNV GL’s Tim Holt said: “Working in aluminium is an entirely different skill set from working in steel. This is exactly why Western Australia is doing well in this field, because it has got that expertise. The skill set has grown over decades.”

Mark Stothard, Director, Echo Marine Group says there is much more to White Rabbit than its aluminium trimaran hull. “One of the incredible things about this boat is its beam of nearly 20m. Add to that the quietness, the smoothness, the efficiency. We definitely have broken some barriers down with it. The noisiest part emits only 42 DBA, which is very little; the boat is dead smooth, amazingly manoeuvrable, and efficient; we got 5,000kW of power available on board in total, including running the house, and we achieved a speed of 18.7 knots at a reasonable load. An equivalent steel superyacht of the same volume ‒ approximately 3,000gt ‒ which we saw in Monaco had twice the kilowatts on board just for the propulsion to do the same speed. That is impressive in itself.”

The owner is pleased with the excellent seakeeping and fuel efficiency. Stothard said: “With the efficiency comes a green aspect. I believe this is the most efficient vessel of its class as a superyacht – it literally has half the horsepower to do the same speed as other vessels, and that means half the fuel. I think the industry is gradually beginning to see the benefits of a multihull design.”

As well as the yacht itself, DNV GL classed its 46m GRP catamaran support vessel Charley. Stothard said working with class means evolving together. “The class tells you what works and what doesn’t. You might start building a 30m boat together, then you go from there into the 40s and 50s, and on it goes. It doesn’t make sense to reinvent the wheel and work with different partners all the time. It makes much more sense to go on the journey together.”

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