Salvage of USS F-4 (SS-23), April-August 1915
Naval personnel examine the large implosion hole in F-4's port side, in drydock at Honolulu, Hawaii, circa late August or early September 1915. She had been raised from over 300 feet of water and towed into port. This view was taken from off the port bow, showing the submarine's port side diving plane in the center. She is upside down, rolled to starboard approximately 120 degrees from the vertical. Courtesy of Donald M. McPherson, 1972. U.S. Naval History and Heritage Command Photograph.