I have always thought a pedal powered canoe was just the craft to win the Cross Sound Rowing Race, which is a race in human powered boats of all kinds from Seattle to Bainbridge Island. It is held every year, and is about a 14 mile course, I am guessing. This little pedal powered kayak would win it I bet, slicing through the waves while displacing much less water than a rowboat, and with more stability than a rowing skull. Maybe someone can tell us if such devices are ever entered in such races. Also, how does the propeller not get snagged on rocks and sand of the shoreline?