Submarines and their crews at Honolulu, Hawaii, in 1914
These boats are (from front to back): USS F-4 (SS-23), USS F-2 (SS-21), USS F-3 (SS-22) and USS F-1 (SS-20). The U.S. Army Transport Dix is in the background. Note the fish flags and 13-star boat ensigns flown by these submarines. Photographed by Noggle. U.S. Naval History and Heritage Command Photograph.