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Underwater gliders



An underwater glider is a type of autonomous underwater vehicle (AUV) that uses small changes in its buoyancy in conjunction with wings to convert vertical motion to horizontal, and thereby propel itself with very low power consumption. While not as speedy, this enables a major increase in range and duration compared to vehicles propelled by electric motors, extending ocean sampling missions from hours to weeks or months, and to thousands of kilometers of range, with a sawtooth path though the water that provides data on temporal and spatial scales unavailable to previous AUVs, and much more costly to sample using traditional shipboard techniques.



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