First submarine circumnavigation
USS Triton
first first
Not Applicable ()

The first vessel to complete an entirely submerged circumnavigation of the globe was the USS Triton SSRN 586 between 24 February and 25 April 1960. The nuclear-powered radar picket submarine, under the command of Captain Edward L. Beach, covered 26,723 nautical miles (49,491 km; 30,752 miles) over 60 days 21 hours, starting and finishing at the St Peter and Paul Rocks in the middle of the Atlantic Ocean.

The circumnavigation was codenamed Operation Sandblast.