On Dec. 17, 1917, the U.S. submarine USS F-1 was lost at sea during a training accident off the coast of California, killing 19 crew members on board.

Authorities approaching a boat suspected of a hit-and-run after a collision involving the USS Midway. The moment a private boat crashed into the USS Midway on Friday, July 18, 2025.

U.S. Navy photo. On Dec. 17, 1917, the USS F-1 was carrying out a maneuver exercise with other submarines near San Diego when it and another submarine, the USS F-3, collided.