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Sentry Completes Its 500th Dive to the Ocean Bottom

WHOI's free-swimming robot helps researchers map the seafloor, and more

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WHOI’s free-swimming robot Sentry completed its 500th dive on October 16, 2018, off the Pacific Coast of Costa Rica. The autonomous underwater vehicle has used its sonar systems to help scientists map the seafloor, track the Deepwater Horizon oil spill, locate the voyage data recorder on the sunken El Faro cargo ship, and carry out advanced research on many other missions to help us better understand our ocean and our planet.



Woods Hole Oceanographic Institution is the world's leading non-profit oceanographic research organization. Our mission is to explore and understand the ocean and to educate scientists, students, decision-makers, and the public.
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