USS S-51 (SS-162)
 USS S-51 (SS-162) was a fourth-group (S-48) S-class submarine of the United States Navy.Her keel was laid down on 22 December 1919 by the Lake Torpedo Boat Company of Bridgeport Connecticut. She was launched on 20 August 1921 sponsored by Mrs. R.J. Mills and commissioned on 24 June 1922 with Lieutenant W. S. Haas in command.