USS X-1
 X-1 (or SS X-1) was the United States Navy's only midget submarine (but see the NR-1 Deep Submergence Craft) laid down on 8 June 1954 at Deer Park Long Island New York by the Engine Division of Fairchild Engine and Airplane Corporation launched on 7 September 1955 at Oyster Bay Long Island by Jakobson Shipyard; delivered to the Navy on 6 October at New London Connecticut and placed in service on 7 October 1955 with Lieutenant Kevin Hanlon in command.