The USS S-47 was a United States Navy submarine, part of the S-class fleet, launched on March 24, 1925. Designed for coastal defense, it was equipped with torpedoes and had a displacement of about 1,200 tons when submerged. The submarine was primarily used for training and patrolling during its service. In 1941, the USS S-47 was decommissioned and later sold for scrap in 1945. Its operational history included various exercises and missions, contributing to the development of submarine tactics during its time. The S-class submarines, including the USS S-47, played a significant role in the evolution of naval warfare.