Abstract: A multi-hulled vessel and the hull design for the hulls of a multi-hulled vessel capable of operating as a hydroplane are presented. Each of the hulls of the multi-hulled vessel are of hydrostatically and hydrodynamically identical configuration. The forward portions of the oppositely disposed sidewalls of the hull are conically shaped and the rearward portions are planar; the forward portion of the base of the hull is cylindrically shaped and the rear portion is planar; and the stern is planar. The two conically shaped front portions of the hull sidewalls are interconnected at an acute angle by a common generatrix which forms the front bow or stem of the hull, and the cylindrical portion of the base of the hull has a horizontal generatrix. The conical sidewall portions and the cylindrical base portion are each tangent to their respective rearwardly disposed planar elements.