There’s another image on my website, that hopefully explains all obscurities: http://www.optisch-edel.de/images/nereus6.jpg The lines of the kite don’t add any resistance and the kite itself stays on top of the water all the time....

Could you perhaps change ”pedal-propelled” to ”kite-driven” in the head line? Everything should be clear then.

The vehicle is NOT pedal-propelled! This is the official press release: Nereus is a conceptual design of a water craft, that allows to achieve relatively high speeds on water and under water. The user can change between swimming and diving as he...