Patent ID: 8707880

Claim:
A multi-hulled vessel comprising a main hull and at least one side hull to each side of the main hull, each hull having a bow and a stern, and motion control means for providing damping to wave-induced motion, the motion control means comprising a forward motion damping device disposed adjacent the bow of one of the hulls, and an aft motion damping device disposed adjacent the stern of at least one other of the hulls, wherein the second moment of area of the forward motion damping device, in plan view, about the center of flotation of the multi-hulled vessel is between 5% and 15% of the second moment of area of the waterplane of the multi-hulled vessel, and wherein the second moment of area of each of the aft motion damping devices, in plan view, about the centerline of the multi-hulled vessel is between 2% and 6% of the transverse second moment of area of the waterplane of the multi-hulled vessel.