RU-27, dubbed Scarlet Knight after the Rutgers Scarlet Knights athletic teams, is an experimental American autonomous underwater vehicle – a modified Slocum Autonomous Underwater Gliding Vehicle – operated by Rutgers University oceanographers. In December 2009, Scarlet Knight was the first robot to cross the Atlantic Ocean underwater, which took it 221 days.

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External links Project website Trailer for upcoming documentary about RU-27 Scarlet Knight Now Displayed at Smithsonian After Historic Trans-Atlantic Crossing