Current Technology

Finavera's AquaBouy uses point absorber technology in which relative motion drives electromechanical or hydraulic energy convertors. Click the image below for youtube video.		Perhaps the farthest along, Pelamis uses attenuator technology. Attenuators are long multisegment floating structures in which the differing heights of waves cause flexing. Where segments connect, it moves hydraulic pumps or other convertors. Click the image below for youtube video.
Overtopping devices like the Seadragon have reservoirs that are filled by incoming waves to levels above the surrounding ocean. Gravity causes the waves to fall back to the ocean surface, turning the turbines.		Oregon State University's SeaBeav is a floating buoy containing copper coils wrapped tightly around a stationary magnet.