PELAMIS project (Portugal) [7]: Pelamis is a wave power generator which has been successfully installed three miles off the northern coast of Portugal (Fig. 5). This is the first commercial scale wave power station in the world. The sea snake-like device is made up of a series of three semi-submerged cylinders linked by hinged joints. Each cylinder has a 3.5-m diameter and is made from 700-tones of carbon steel. The motion of each hinge is resisted by hydraulic rams driving generators which produce electricity. The power conversion units in each 140-m long Pelamis P-750s generates up to 750-kW.