How does it work?
The system is only powered by the natural force of the river and enables you to surf with your friends. With the help of a pulley system and an underwater sail, the river speed is used to accelerate the surfer. And that's how it works:
The system consists of the following three parts: underwater sail, pulley block and rope. At least two people are required to operate the system. The block and tackle must be attached to a fixed point (e.g. a bridge). Once in the water the surfer drifts downstream and the sail on the other end of the rope is pulled upstream to the pulley.