The USS Pargo (SS-3) was a United States Navy submarine, launched on March 28, 1913. It was the third submarine in the U.S. Navy and was designed for coastal defense. The Pargo was part of the early development of submarine technology and played a role in demonstrating the capabilities of underwater warfare. Throughout its service, the Pargo underwent several modifications to improve its performance. It was decommissioned in 1923 and later scrapped in 1931. The submarine is a significant part of naval history, representing the evolution of submarines like the later USS Nautilus and advancements in naval engineering.