Abstract: A vessel for water travel that has the stability of a heavy weighted vessel when at rest in the water and the performance of a lightweight vessel when in a planed condition. The vessel comprises at least one hull structure for partially submerged flotation in a body of water and at least two hull elements affixed to or a structural part of the hull structure. The hull structure may further comprise laterally spaced hollow ballast devices that rare open at respective fore and aft ends, thus providing stability when submerged in the water and performance by the evacuation of water when in a planed condition.