The USS Sargo (SS-188) was the lead vessel of her class of United States Navy submarines, constructed by the Electric Boat Company in Groton, Connecticut. Her keel was laid on 12 May 1937, and she was launched on 6 June 1938, with Mrs. Catherine V. Nimitz serving as her sponsor. She was officially commissioned on 7 February 1939. As a notable innovation, Sargo was the first U.S. submarine equipped with a new lead-acid battery designed to resist battle damage. This "Sargo battery" featured dual concentric rubber cases with a soft rubber layer between, reducing the risk of sulfuric acid leakage and corrosion during depth-charging operations. The battery's capacity was slightly increased by installing 126 cells, raising the voltage from 250 to 270 volts, a standard in subsequent U.S. submarines. Following her shakedown along South America's eastern coast, Sargo joined the Pacific Fleet, transiting the Panama Canal to arrive in San Diego in August 1939. Her early service included patrols in the eastern and mid-Pacific, notably a 40-day war patrol in late 1941 between Midway and the Marshall Islands. She was present at Pearl Harbor during the attack on 7 December 1941 and soon embarked on her first war patrol, operating along French Indochina and the Netherlands East Indies. Despite initial challenges with torpedo reliability, she engaged Japanese shipping, though with limited success. Throughout World War II, Sargo conducted multiple war patrols across strategic locations such as the Gulf of Siam, South China Sea, and waters around Japan. She participated in sinking enemy vessels, including cargo ships and transports, and provided vital rescue and supply services, notably aiding the crew of the grounded S-36 and delivering critical ammunition to allied forces in the Philippines. She also faced hazards, including a mistaken attack by an RAAF bomber near Australia that caused significant damage. Decommissioned on 22 June 1946, Sargo’s service record highlights her as a resilient and innovative vessel, contributing significantly to U.S. submarine warfare efforts during WWII. Her technological advancements, operational history, and wartime achievements make her an important vessel in maritime history.

This description has been generated using GPT-4.1-NANO based on the Vessel's wikidata information and then modified by ShipIndex.org staff.