Screw propelled water saddle
Self-propelled surfboard
Self-tensioning pedal drive mechanism for a human powered boat
Steering apparatus for an inflatable raft
Surfboard type boat convertible into sailboat or buoy
Swimmers paddle wheel
Swimming aid
Swimming device
Swimming device
Swimming propulsion device
Swimming wheel apparatus
Swing-operated paddle-wheel water-craft
Unicycle for operation in water
Universal platform for human powered floatation devices
User-propellable sport board device
Vehicular sports device able to travel over firm surfaces, soft
Vessel and driving means
Water apparatus
Water bicycle
Water bicycle