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→Maximum Hull Speed
Hull Speed = 1.34 * LWL^1/2
[[File:MaximumHullSpeed.jpg|thumb|left|260px|Driving perfectly at maximum Maximum hull speedoccurs when the length of the bow wave equals the waterline length, making the vessel appear to be supported at both ends – Photo with permission © Djurgardsvarvet http://www.djurgardsvarvet.se/]]
Maximum hull speed of a displacement boat in knots is 1.34 times the square root of the length of the hull at the water line. Maximum speed is attained when the length of the bow wave is the same as the waterline length. Maximum hull speed is really the maximum efficient hull speed. You can drive a boat faster than its hull speed but it will take increasing gobs of power to do so.