Abstract: A high speed planing hull is provided, which is generally of a deep Vee form and which is provided with multiple steps in the fore-and-aft direction in combination with variable dead rise from keel to chine in the steps. The arrangement is such that, when the hull achieves planing speeds, not only is the hull bottom ventilated at the fore-and-aft steps, but the variable dead rise configurations, which provide for elevation of the keel area in relation to the chine area, provide for increased support of the hull near the chines, and relatively less support near the keel. Reduced wetted surface, and therefore frictional drag, is realized, while at the same time providing for a safer and more comfortable ride by improving both longitudinal and lateral stability.