England before returning to Key West. At the time of her decommissioning, Picuda held the record for being the longest serving submarine in the history of the US Navy. She had served 28 years, 11 months and 15 days. The previous record holder was USS O-4 (SS-65). Spanish Navy service Transferred to Spain on 1 October 1972, former Picuda was renamed . The submarine was stricken from the U.S. Navys Naval Vessel Register on 1 November 1974 and was purchased outright by Spain on 18 November 1974. In 1975, she was laid up with mechanical defects and finally deleted from the Armada Española'' on 30 April 1977, her name being shifted to former ex-Jallao (SS-368), which the Spanish had acquired. See also List of submarines of the Spanish Navy References External links Photo gallery at navsource.org Balao-class submarines Ships built in Kittery, Maine 1943 ships World War II submarines of the United States Cold War submarines of the United States Balao-class submarines of the Spanish Navy