Abstract: A self-propelled watercraft referred to herein as vessel (10), such as, though not limited to, a kayak or the like. At least two ridges (34) and (36) are provided in the hull bottom (17) in spaced relation from one another. Likewise, at least two ridges (44) and (46), in spaced relation from one another, are provided in seat bottom (30). In one embodiment, the distance (60) between ridges (34) and (36) is greater than the distance (65) between ridges (44) and (46) such that ridges (44) and (46) are captured by ridges (34) and (36) thus preventing undesired lateral movement of the seat (25) within the interior volume (50) of the hull (15). The seat (25) is positioned lower in the hull than with a traditional seat, thus lowering the center of gravity for the vessel (10) when an occupant is seated, making the vessel (10) more stable in the water.

Abstract: A rudder assembly for self-propelled water craft, and particularly for a touring kayak. A rudder member is positioned within a notch of the rear of the keel of the craft, the exterior contour of this rudder member is made to augment the contour of the rest of the kayak hull to minimize changing the pattern of water flow around the craft. The rudder member is moved using an upstanding shaft attached to a disk within a recess in the rear of the craft, this disk being provided with starboard and port cables that extend to the cockpit of the craft. Axial movement of the cables is achieved using left and right foot pedals attached to slides within fixed channels. Provision is made for the adjustment of length of the cables, and for releasably locking one or both against axial movement.

Abstract: A method for achieving high definition graphics in the surface of a body molded from plastic powders. The method is specifically described for use in achieving high definition graphics in the surfaces of kayaks formed by rotational molding using plastic powders, with the kayak mold being heated to above the transition temperature of the plastic powders. The high definition graphics are achieved by preplacing a stencil containing cut-outs for the desired design against the surface of the kayak body mold. The openings of the stencil are filled with a plastic powder corresponding to the color(s) of the design. After removal of the stencil, an overlayer of plastic powder corresponding to the main kayak hull is applied. Local heating is achieved to form a skin on the combination of these pre-placed powders. Subsequent heating of the entire mold in a heated oven, with appropriate rotation of the mold, distributes the bulk powder for the hull, melts the powders, and forms the entire hull.