In July 2012, MBARI engineers deployed the power buoy designed to harness the power of the ocean waves. The buoy is 2.5 meters (8 feet) across and a massive metal plate is hanging in the water below the buoy. While the buoy rises and falls with the waves, the plate, 30 meters (100 feet) down, remains relatively stationary. Between them is a large hydraulic cylinder with a piston inside. As the buoy rises and falls, it pushes and pulls on this piston. This forces hydraulic fluid through a hydraulic motor, which in turn runs an electrical generator. Read more about it on our website.