Wide-keeled boat hull with multiple, straight line planing surfaces

Claim 1

A high speed planing boat hull including a transom stern, freeboard side portions extending from the transom and terminating in a V-bow, a keel centerline extending the longitudinal extent of the hull and having a wide keeled lower hull portion extending from the keel centerline to outer chine junctures with the side portions, the wide keeled lower hull portion comprising a. keel sidewalls forming deadrise angles between 25° and 35°, b. keel bottom surfaces which are flat at the transom but progress forwardly to form increasing deadrise angles and to merge into the keel sidewalls slightly above the point at which the planing water line intersects the hull, c. first steps adjacent the keel bottom surfaces, substantially parallel to the horizontal plane of the keel centerline and having deadrise angles between 5° and 10°, d. risers extending at steep deadrise angles from inner chine junctures with the first steps to locate the first steps below the outer chines, e. second steps interconnecting the risers and the side portions, substantially parallel to the horizontal plane of the keel centerline and having deadrise angles between 5° and 10°, f. spray strips, to direct the water onto the first steps, located on the lower hull portion and extending from the V-bow rearwardly to a point above the intersection of the planing water line with the boat hull, g. retention strips, to keep the water from spilling off of the first steps, located adjacent the inner chine junctures and comprising short, slightly downwardly angled steps, and h. the outer chine juncture, the inner chine junctures and the juncture of the displacement section and the second steps are substantially parallel to the vertical plane of the keel centerline.