Patent ID: 8065970
Filing Date: 2011-11-29
Classification: B63B,Y02T

Abstract:
1. A multi-hull boat comprising: a bow, a stern and at least three hulls including outer hulls and at least one central hull, wherein at least a longitudinal portion of each hull is submerged and a longitudinal portion of each hull is not submerged when the boat is floating stationary on a stretch of calm water, wherein the area of a cross-section taken along a longitudinal axis of said boat of a space which is created between two opposing hull walls of adjacent hulls, the surface of the water, and an unsubmerged bottom face of a deck facing the water surface, decreases from the bow to the stern, wherein an angle formed by the two opposing hull walls increases from the bow to the stern, and wherein when the boat is out of the water, heights of the hulls, between a horizontal reference and a lowest part of the bottom of the hulls, are greater for the outer hulls than for the at least one central hulls in the same cross sectional plane.