wave motion is a constant therefore that motion can be used to move a rocking arm; which links to a common piston pump cylinder. Which is used to pump water into a tower. when the tower is full. Water is released back down into a turbine running an electrical generator/ and back out to sea. this happens as long as there are waves to push the rocker arm back forth. Multiple pumps can be used. two towers or a divided tower (either/ or) can be used to keep the generator running.