Tethys underwater robot takes best of both worlds to go the distance

When it comes to exploring the murky depths of the oceans, autonomous underwater vehicles (AUVs) have become increasingly important over the past decade. These vehicles generally fall into one of two groups: propeller-driven vehicles such as Snookie that can travel fast and carry lots of instruments, but are limited to expeditions of just a few days, and “gliders,” which can stay at sea for weeks or even months at a time, but are slow. Engineers have combined the best of these two approaches to create a new long-range AUV (LRAUV) that can travel rapidly for hundreds of kilometers, “hover” in the water for weeks at a time, and carry a wide variety of instruments.

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