Liquid Robotics’ Waveglider is an autonomous submersible that explores the ocean using the power of the sun and waves. As Roger Hine explains at Bay Area Maker Faire 2011, the Waveglider can either traverse the waters on its own, converting the up-and-down motion of the waves into forward propulsion, or can be controlled remotely by a user with a GPS satellite link.
http://liquidr.com/
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