HOV Alvin being launched from the R/V Atlantis.
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HOV Alvin
The U.S. Navy’s human occupied vehicle (HOV) Alvin being launched from the Office of Naval Research’s Research Vessel Atlantis. Alvin can reach depths of 6,500 meters (approximately 4 miles), carrying two scientists and one pilot for about eight hours per dive. Owned by the U.S. Navy, Alvin has been in operation since 1964 through Woods Hole Oceanographic Institution.
Credit

The Aleutian Arc: Integrated Exploration of Biodiversity at Priority Benthic Habitats (USGS/BOEM/NOAA/ONR). Photographer: Art Howard.