The life guard on the beach can maybe detect an emergency, but it can also be very hard to keep track of the location once he/she is on the out in the water to find the person in need of help. In this situation the buoy makes it much more easy to keep track of the location since it can move to the location much faster than the life guard can.
Once the buoy is there it serves as a marker and temporary flotation device until further rescue can arrive. The buoy can work in a team of buoys to monitor the full width of a beach.
Furthermore it is equipped with the Shark shield technology that provides an electro magnetic field around the buoy at a frequency that sharks are sensitive to and seek to avoid. In that way it creates a safe zone around the buoy in case of sharks approaching the beach.
The buoy stays charged with a wave energy generator from which it can detach should there be an rescue situation.
Winner of BraunPrize 2005