USS S-3 (SS-107) was the prototype of the "Government-type" S-class submarines of the United States Navy. (S-1 was the "Holland-type" prototype and S-2 the "Lake-type".) Her keel was laid down on 29 August 1917 by the Portsmouth Navy Yard. She was launched on 21 December 1918 sponsored by Mrs. William L. Hill, and commissioned on 30 January 1919. Following outfitting and trials, S-3 began her career with training operations along the New England coast operating out of Portsmouth and New London, Connecticut. In 1920, she twice visited Havana, Cuba: first in January, and again in December.