A watercraft with improved safety and stability is provided. The watercraft includes a shell defining a plurality of raceways for receiving water during certain maneuvers of the watercraft, thereby excerpting force upon the watercraft in a first direction. The shell is configured so as to prevent or otherwise inhibit the water from excerpting an opposed second force upon the watercraft. An intermediate panel of the shell provides increased flexibility, thereby serving as a shock absorber for the watercraft.

A watercraft with improved safety and stability is provided. The watercraft includes a shell defining a plurality of raceways for receiving water during certain maneuvers of the watercraft, thereby exerting force upon the watercraft in a first direction. The shell is configured so as to prevent or otherwise inhibit the water from exerting an opposed second force upon the watercraft. An intermediate panel of the shell provides increased flexibility, thereby serving as a shock absorber for the watercraft.

A flat bottom boat including an upper hull portion and a lower hull portion. The upper hull portion has a first width and a lower surface. The lower hull portion has a second width that is less than a first width. The lower hull portion extends from a lower edge of the upper hull portion. A lower surface of the lower hull portion is substantially flat.

The present invention is method of reducing the longitudinal beam of a kayak in the area of a kayaker's paddle stroke by incorporating a cutaway section. The invention allows the paddle to be closer to the center of gravity of the kayak and thus produce more drive force and less wasted turning force. The paddler doesn't have to reach out so far to the side and therefore has a more comfortable and ergonomic stroke.

Vehicles designed to use ground effect forces to control a positioning of the vehicle relative to a surface as well as their methods of use are described.

Vehicles designed to use ground effect forces to control a positioning of the vehicle relative to a surface as well as their methods of use are described.

Vehicles designed to use ground effect forces to control a positioning of the vehicle relative to a surface as well as their methods of use are described.

A watercraft with a rigid outer hull having a substantially circular shape in plan view and a rounded bottom surface for contacting a body of liquid, and a rigid top surface disposed opposite said bottom surface and integrally formed with the outer hull, the top surface having an annular stability portion with convex walls in cross-section and a recessed flat-bottomed deck portion adapted to receive a person, and an edge of the recessed deck portion being disposed inwardly from an outermost edge of the top portion by a distance, and a method for using same.

The present invention is method of reducing the longitudinal beam of a kayak in the area of a kayaker's paddle stroke by incorporating a cutaway section. The invention allows the paddle to be closer to the center of gravity of the kayak and thus produce more drive force and less wasted turning force. The paddler doesn't have to reach out so far to the side and therefore has a more comfortable and ergonomic stroke.

A watercraft with a rigid outer hull having a substantially circular shape in plan view and a rounded bottom surface for contacting a body of liquid, and a rigid top surface disposed opposite said bottom surface and integrally formed with the outer hull, the top surface having an annular stability portion with convex walls in cross-section and a recessed flat-bottomed deck portion adapted to receive a person, and an edge of the recessed deck portion being disposed inwardly from an outermost edge of the top portion by a distance, and a method for using same.