Abstract: A hull is provided including opposite longitudinal upstanding outer sides and a central depending longitudinal displacement-type keel. The forward ends portions of the outer sides and the keel curve inwardly and upwardly, respectively, and merge to form a forwardly and upwardly tapering bow. The lower portions of the sides, rearward of the bow, terminate downwardly in downwardly and outwardly inclined outer side surfaces of opposite side downwardly and outwardly inclined displacement-type cutwaters whose lower marginal portions are rearwardly and downwardly inclined. The cutwaters include inwardly and upwardly inclined inner side surfaces extending longitudinally thereof and which diverge upwardly away from the corresponding outer side surfaces.