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An upgraded Alvin puts new ocean depths within reach
Throughout its history, Alvin—the most active research submersible in the world and the only U.S. HOV capable of reaching such extreme depths—has contributed to numerous scientific discoveries ...
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Aquanaut at Work
The submersible Alvin about 8,500 feet down ... National Oceanic and Atmospheric Administration who were using the HOV (Human Occupied Vehicle) Alvin to study the geology of the Galapagos ...