USS Marlin (SST-2) in the late 1950s
|Builders:||Electric Boat Division of General Dynamics Corporation, Groton, Connecticut|
|Displacement:||303 long tons (308 t) surfaced
347 long tons (353 t) submerged
|Length:||131 ft 3 in (40 m)|
|Beam:||13 ft 7 in (4.14 m)|
|Draft:||12 ft (3.7 m)|
|Propulsion:||Diesel-electric, single screw|
|Speed:||10 knots (19 km/h; 12 mph) surfaced
10.5 knots (19.4 km/h; 12.1 mph) submerged
|Endurance:||90 minutes at full speed
102 hours at 3 knots
|Test depth:||712 ft (217 m) operating
1,050 ft (320 m) collapse
|Complement:||2 officers, 12 enlisted men|
|Armament:||1 × 21 in (533 mm) torpedo tube|
The T-1 class submarines were a pair of submarines built for the United States Navy in the early 1950s for use in training submarine personnel and testing submarine equipment. Both submarines of the class served in these roles for over 19 years.
Design and construction
The T-1-class were among the smallest operational submarines ever built for the United States Navy. The first unit was planned as an experimental auxiliary submarine with hull number AGSS-570, but instead was built as the training submarine USS T-1 with hull number SST-1. Her sister ship, USS T-2, was planned as SST-2 from the beginning.
Both submarines entered service in 1953 and were renamed in 1956, T-1 becoming USS Mackerel (SST-1) and T-2 becoming USS Marlin (SST-2). Both operated primarily in Florida and Caribbean waters to train submarine personnel, serve as targets for sonar and antisubmarine warfare training, and test submarine equipment. They were decommissioned simultaneously in a combined ceremony in 1973.
USS Mackerel (SST-1), ex-USS T-1, ex-AGSS-570
USS Mackerel (SST-1), planned as AGSS-570, was commissioned as T-1 (SST-1) in October 1953 and decommissioned in January 1973. A highlight of her career was testing of equipment for the NR-1 Deep Submergence Craft in 1966-1967. Mackerel was sunk as a target in 1978.
USS Marlin (SST-2), ex-USS T-2
USS Marlin (SST-2) was commissioned as USS T-2 (SST-2) in November 1953 and decommissioned in January 1973. Donated as a museum ship in August 1973, she was assigned on 20 August 1974 to go on display at Freedom Park in Omaha, Nebraska.
- NavSource Online: Submarine Photo Archive Mackerel (AGSS-570) T-1 (SST-1) / Mackerel (SST-1)
- NavSource Online: Submarine Photo Archive T-2 (SST-2) / Marlin (SST-2)
- This article includes information collected from the Naval Vessel Register, which, as a U.S. government publication, is in the public domain. The entry can be found here. for USS Mackerel (SST-1)
- This article includes information collected from the Naval Vessel Register, which, as a U.S. government publication, is in the public domain. The entry can be found here. for USS Marlin (SST-2)
- Gardiner, Robert. Conway's All the World 's Fighting Ships, 1947–1982, Part One: The Western Powers. Annapolis, Maryland: Naval Institute Press, 1983. ISBN 0-87021-918-9.
- "Midget Submarines Play Targets For Killers." Popular Mechanics, July 1954, pp. 84–89/240.
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