Seakeeping Research AluminumNow's partners & colleagues have an ongoing research program into sea keeping involving both model and full scale tests. A number of Crowther Multi-hulls ferries operate in some of the worst ocean passages in the world The 'Te Hukatai' operates across Cooks Straight, New Zealand (between the North and South island). The 'Sea Bus I & II' operates along the East coast of Tanzania. The 'Wanderer II' operates through the Devils Gate, Strahan, on the West Coast of Tasmania, Australia. The 'Wanderer III' operates through the Devils Gate, Strahan, on the West Coast of Tasmania, Australia. The hull shape has been optimized for seakeeping. This optimization process involves numerical simulation, towing tank  and full scale model experiments. A typical experiment undertaken was at the Australian Maritime College on a 1/15th-scale model of a 24m high-speed ferry operating at 25 knots in direct head seas. Below is a summary of the results for the 24m hull shape: Seakeeping Towing Tank Results Acceleration (amidships) 0.1g (1.2m/s^2) Acceleration   F.P. 0.2g (2.3m/s^2) Heave (amidships) 0.27m Heave (F.P.) 0.49m Pitch 1.303 deg. The experiments were modelled for a full scale wave condition with a significant wave height of 1.5m and a wave crossing period of 4.0s. This wave condition was highlighted as the worst condition for this particular vessel from the Response Amplitude Operator (RAO) derived from a set of experiments over a matrix of wave conditions. All designs can incorporate an active ride control system. The addition of ride control systems will result in a further 30% reduction in vessel motion. Please contact AluminumNow for sea keeping information specific to your vessel requirements. Home