Patent ID: 7497179

Claim:
A quadra-pod twin-hull catamaran boat or vessel comprising; two catamaran hulls joined transversally and longitudinally by a deck, each catamaran hull defining a longitudinal dimension; each said catamaran hull comprising a bottom in a fore section of the hull having an exterior surface, opposing sides attached to said bottom and extending upwardly therefrom and a transom connecting said sides and being attached to and extending upwardly from said bottom, a step extending inwardly from said bottom generally perpendicular to said longitudinal dimension, said step lying in a plane passing through said hull generally transverse to said longitudinal dimension defining a bow hull portion extending forward of said plane and a recessed portion extending rearward of said plane, with an aft hull portion having an exterior surface, opposing sides attached to said bottom and extending upwardly there from and a transom connecting said sides and being attached to and extending upwardly from said bottom; said bow hull portion of each said catamaran hull bottom comprising a port face and a starboard face joined to form a V-shape that extends from proximal said bow to said step, a line formed by said port face and said starboard face of said bow hull portion defining a keel of a bow of said bow hull portion, said port face and said starboard face of said bow hull portion each defining an angle with a horizontal plane passing through said keel, said angle at a cross-section proximal said bow is at least 55 degrees, said angle diminishing to no less than 15 degrees at said step; a mid-length hull portion of each said catamaran hull having an air cavity formed therein, said air cavity extending rearward from said step of the bow hull portion to proximal with the aft hull portion, with in-sloping side surfaces and a top wherein air can be mechanically induced into the air cavity to provide lift; said aft hull portion of each said catamaran hull bottom comprising a port face and a starboard face joined to form a V-shape that extends from proximal a bow of said aft hull portion to said transom, a line formed by said port face and said starboard face of said aft hull portion defining a keel of a bow of said aft hull portion, said port face and said starboard face of said aft hull portion each defining an angle with a horizontal plane passing through said keel, said angle at a cross-section proximal said bow is at least 55 degrees, said angle diminishing to no less than 20 degrees or less at said transom.