USS Haddo (SS-255)

USS Haddo (SS-255) was a Gato-class submarine of the United States Navy. She was named for the haddo, a variety of grouper found in the Gulf of Mexico and along the southern Atlantic coast.

Haddo was launched on 20 June 1943 by the Electric Boat Company of Groton, Connecticut, and commissioned on 9 October 1943, with Commander Chester W. Nimitz, Jr. (son of Fleet Admiral Chester W. Nimitz) in command.

During World War II, Haddo conducted six war patrols in the Pacific. She sank a number of Japanese ships, including the light cruiser Tama. She was awarded six battle stars for her service.

After the war, Haddo served in various roles, including training and research. She was decommissioned on 15 June 1946 and placed in reserve.

Haddo was reactivated in 1952 and converted to a Guppy IIA submarine. She was recommissioned on 8 August 1952. She served until 1969, participating in exercises and fleet operations.

Haddo was stricken from the Naval Vessel Register on 30 June 1969, and sold for scrap on 25 March 1971.