"What could be more fun than flying a kite or riding a Waverunner? Try both at the same time! That’s the basic idea behind the “Nereus” water craft by designer Mathias Koehler. Powered by none other than Mother Nature herself, this water craft can deliver hours of fuel free fun above and below the water. Steering is managed via foot pedals and the diving function is handled vie the hand grips controlling the pivoting fins at the base. Sailing into the wind is a simple as traditional zig zag tacking. I am still looking for the way to stop that does not include scissors or the wind to die down."