POI's creator (Voyajo Team)
USS Marlin (SST-2), originally USS T-2 (SST-2), was a T-1-class training submarine in commission from 1953 to 1973. She was the second submarine of the United States Navy to be named for the marlin, a large game fish. She was one of the smallest operational submarines ever built for the U.S. Navy. (...) (from Wikipedia)