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NavSource Online: Submarine Photo Archive

Patch contributed by Mike Smolinski
Radio Call Sign: November - Echo - Papa - November

Mackerel (AGSS-570)
T-1 (SST-1) / Mackerel (SST-1)

T-1 Class Submarine: Planned as Auxiliary Submarine (AGSS-570); Laid down, 1 April 1952, at Electric Boat Division, General Dynamics Corp., Groton, CT; Launched, 17 July 1953; Placed in service as T-1 (SST-1), 9 October 1953; Renamed Mackerel (SST-1), 15 July 1956; Commissioned USS Mackerel (SST-1) in 1971; Decommissioned, and simultaneously struck from the Naval Register, 31 January 1973, at Naval Station Key West, FL.; Final Disposition, sunk as a target off Puerto Rico, 18 October 1978.

Specifications: Displacement, Surfaced: 303 t., Submerged: 347 t.; Length 131' 3"; Beam 13' 7"; Draft 12' 2" (mean); Speed, Surfaced 10 kts, Submerged 10.5 kts; Complement 18; Armament, one 21" torpedo tube; Propulsion, diesel-electric, single screw.
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Mackerel 2.30k T-1 is reached as the the countdown ends and the submarine T-1 (SST-1) hits the water at Electric Boat Division, General Dynamics Corp., Groton, CT., 17 July 1953. USN photo courtesy of Bill Gonyo.
Mackerel81kLots of children dream of participating in the launching of a real submarine. Some times that wish becomes true. John Robison is the 10 year old that is standing third from the rear of the conning tower as the T-1 (SST-1) floats on the Thames River at Electric Boat Division, General Dynamics Corp., Groton, CT., 17 July 1953.
The fleet boat in the background is the Cobia (SS-245).
Official USN photo, courtesy of Electric Boat Division, General Dynamics Corp.
Photo submitted in memory of Clifford E. Robison, Electric Boat Co, by John Robison.
Mackerel1.14kThe T-1 (SST-1), bow view 45 degrees, 12 October 1953. Photographed by Electric Boat Division, General Dynamics Corp, Groton, Connecticut. Small in size but large in responsibility, the Navy's T-1 will act as a target for anti-submarine forces. Only 131 feet long and 250 tons as compared to the 1500 tons of conventional size sub, the T-1 carries the same general equipment as her sisters but carries a crew of sixteen. Photo # USN 630975, courtesy of the National Museum of the U.S. Navy, via
Mackerel 608k T-1 (SST-1), broadside view, at Electric Boat Division, General Dynamics Corp., Groton, CT.,12 October 1953. US National Archives photo # 80-G-199151, from NARA, College Park, Maryland, courtesy of Sean Hert.
Mackerel133kThe T-1 (SST-1), shown here three days after her commissioning at Electric Boat Division, General Dynamics Corp., Groton, CT.,12 October 1953.USN photo.
Mackerel 489k T-1 (SST-1), elevated position head on bow view at Electric Boat Division, General Dynamics Corp., Groton, CT.,9 December 1953. US National Archives photo # 80-G-199160, from NARA, College Park, Maryland, courtesy of Sean Hert.
Dogfish, T1 & T236kThe Dogfish (SS-350) with T-1 (SST-1) inboard & Marlin (SST-2) outboard, circa post 1953.USN photo courtesy of Electric Boat /
Mackerel415kNew London, CT., 23 January 1954. Target sub dwarfed by conventional sub, Barb (SS-220)
Moored at the Navy's submarine base here, the little T-1 (T stands for target) is a product of the Electric Boat Division, General Dynamics Corp, Groton CT. The little boats job is to work with the antisubmarine forces, as a target for them, and also as an experimental vessel, to try out some ideas the Navy has. The T-1 has a carefully selected crew of 14 enlisted men and two officers. She holds within her 131 feet of length the same general machinery and equipment as the GUPPY submarines more than twice her length and displaces 250 tons to the conventional submarines 1500.
AP Wirephoto courtesy of David Buell.
Mackerel25k The Mackerel (SST-1) in the Cooper River at the Charleston S.C. Naval shipyard. The Mackerel was at the yard for repairs to the hull in October of 1954. The hull was coated with neoprene rubber to protect from the corrosion. This was a major project for the paint shop.USN photo courtesy of Robert Hall.
Medregal726kFrom left to right:Mackerel (SST-1), unknown, Medregal (SS-480),Batfish (SS-310) & Chivo (SS-341) at Key West, 1955.Photo courtesy of John Hummel.
Mackerel459kBroadside view of the Mackerel (SST-1), underway, 1955. U.S. Navy official photo courtesy of Robert Hurst.
Mackerel39kBroadside view of the Mackerel (SST-1), underway, possibly when she participated in fleet exercises off the east coast, mainly conducting training and target assignments, including some for the Fleet Sonar School at Key West in 1956. Partial text courtesy of DANFS.
USN photo courtesy of Robert Hurst.
Chivo 82k Mackerel (SST-1) & Chivo (SS-341) on the way to Gulfport Mississippi, January / February 1957. Photo courtesy of John Hummel.
SST 3.00k 4 photo PDF of the Barracuda (SST-3) next to the quay wall, & T-1 (SST-1) away from the quay wall, alongside the Observation Island AG-154) at Norfolk Naval Shipyard, circa late 1950's. Photos courtesy of NARA, National Archives Identifier: 6929052,Local Identifier: 19-NN-AG-154 Observation Island, From: Series: Photographs of U.S. and Foreign Naval Vessels, 1883 - 1972,Record Group 19: Records of the Bureau of Ships, 1940 - 1966, courtesy of Stephen Gower.
Photo i.d. courtesy of Jim Christley, Ric Hedman, Dave Johnson (USNR), Robert Morgan & Ron Reeves.
PDF added 01/16/16.
Thornback 651k Birds of a feather not all flocking together: Mackerel (SST-1), Thornback (SS-418), Clamagore (SS-343) & Chivo (SS-341) with the Howard Gilmore (AS-16) in the distance. Photo courtesy of John Hummel.
Mackerel70kSquadron 12, Key West Fla, in Mid 60's: Marlin (SST-2) and Mackerel (SST-1).Photo courtesy of John Hummel.
Mackerel68kMackerel (SST-1), underway, date and place unknown.USN photo courtesy of George M. Arnold.
Mackerel98kMackerel (SST-1), underway, date and place unknown.USN photo courtesy of George M. Arnold.
Mackerel134kThis boat is Mackerel (SST-1) or Marlin (SST-2) and was probably taken at Key West. It could have been taken at one of two of the following periods; in June/July 1967 Mackerel had "special equipment" removed from her during this drydocking, equipment that had been used to prove concepts for the NR-1. It looks as if most of the aft superstructure has been removed. It is also possible that the photo was taken shortly after her decommissioning on 03 January 1973. She may be undergoing preps for disposal.
Marlin was preserved for museum donation and retained her superstructure.
USN photograph courtesy of Scott Koen &
Photo i.d. courtesy of Ric Hedman & Dave Johnston (USNR).
Text i.d. courtesy of Dave Johnston (USNR).
Marlin216kThe Marlin (SST-2), the T-1 and the Quillback (SS-424) at the pier at the Naval Station Key West in March 1973. Photo from the Ida Woodward Baron Collection in the Florida Keys Public Library via courtesy of Steven Gower.
Mackerel49kModel of the Mackerel (SST-1).Courtesy of Rick Spector.
Mackerel71kThe Mackerel (SST-1) at Naval Base Mayport Fla. in mid to late 1975.Photo owned & copyrighted courtesy of Bob Royes.

View the T-1/Mackerel (SST-1)
DANFS history entry located on the Haze Gray & Underway Web Site.
Crew Contact And Reunion Information
U.S. Navy Memorial Foundation
Fleet Reserve Association

Additional Resources and Web Sites of Interest
USS Mackerel (SST-1)

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