USS Trepang (SSN-674), a Sturgeon-class attack submarine, was the second ship of the United States Navy to be named for the trepang. commissioned on 14 August 1970.
Following local operations out of her home port, New London, Connecticut, Trepang proceeded to the Arctic early in 1971. From 22 February to 22 March 1971, she operated beneath the polar ice cap, conducting extensive tests to provide data for her weapons systems as well as carrying out scientific experiments concerning the movement, composition, and geological history of the ice cap itself.
After returning to New London via Faslane, Scotland, Trepang was soon deployed to the warmer climes of the Caribbean Sea, departing from New London on 22 April 1971 and subsequently making port at Frederiksted on St. Croix in the United States Virgin Islands for weapons systems acceptance and evaluation trials.
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