With interest growing in the superyacht market for multihulls, Australia's McConaghy Boats has unveiled a 46.8m trimaran concept in association with Mani Frers and Design Unlimited. The cooperation between the three companies is on a ‘design and build’ basis.

The 46.8m composite trimaran, the MC 155, is intended to combine business and pleasure in an efficient and high-performing package. The yacht will be built to LY3 and MLC regulations, with accommodation for nine in four cabins, and crew quarters for six. Maximum speed predictions are for 24kt, with a range of 2,500Nm cruising at 14kt.

The compact trimaran design has a drag coefficient so low that build and running costs equate to a monohull half her size. Test results from the Potsdam tank facility in Germany have exceeded all expectations in terms of hydrodynamic resistance, pitch and roll.

The design has already undergone extensive development. Mani Frers led all aspects of the naval architecture and styling, while McConaghy developed the engineering and systems on board. Composite engineering was handled by Pure Design. A peer-review of the vessel’s seakeeping qualities has been made by DNVGL, and the interior design comes from Design Unlimited. It is now ready to commence production.

The new superyacht features a number of lifestyle elements such as the location on the aft deck of a large sheltered lounge area with bar facilities that frame a pool. Steps either side lead down to a swim platform.

Headlining the interior arrangement is the panoramic master suite, which utilises the upper deck. This large stateroom is complemented by an ensuite bathroom, dressing room with walk-in wardrobe, and a private gym – all with views to the horizon. The private deck space is accessed via glass sliding doors and also positioned here is the owner’s helipad.

The main saloon and interior dining area, spanning the 11.3m beam, have an open flow for seamless transitions between the interior and exterior spaces, with the main aft deck serving as a social area, beach club and additional lounge. Versatility of space was key to the brief and the interior spaces can be closed off to create private areas more suited to business use.

McConaghy Boats has previous trimaran experience with Adastra. The 42.5m (140ft) vessel was built in China in 2013 and designed by Shuttleworth Design.