Abstract: A water-borne craft includes a hull having a pair of wing-like foils positioned on the bottom of the hull toward the rear or stern portion of the craft and in equally spaced relation on opposite sides of the fore and aft center line or symmetry axis of the hull such that the foils are immersed in the water when in use. The foils are each arranged so as to be movable between a first position such that they meet the relatively moving water and generate a lifting force which reacts with the hull so as to lift the rear portion of the hull upwardly, and a second position wherein no lifting force is generated by the foil as, for example, during turning motion of the hull. By exerting the lifting force on the rear portion of the hull, the planing angle is reduced thus reducing hydrodynamic drag and allowing for an increase in speed.

Abstract: The invention provides a locking device for the securing against unauthorized removal of an article of manufacture of the type having an elongated groove therein with a re-entrant channel in at least one side wall of a groove for receiving one or more locking pins therein. The groove will also have a widened section therein defining an entry/exitway leading to the re-entrant channel from the exterior of the article. The locking device according to the invention includes a pair of relatively movable rigid members with at least one of the members having a locking pin therein which is adapted to enter into the groove via the above-noted entry/exitway and to engage in the re-entrant channel within the groove a desired distance away from the entry/exitway so as to prevent unwanted removal from the groove. The other of the rigid members is adapted to be locked in a selected position with respect to the first-noted member such that said at least one member is securely retained within said groove.