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USS T-1 (SS-52)
Career
Builder:	Fore River Shipyard [1]
Laid down:	21 June 1916 [1]
Launched:	25 July 1918 [1]
Commissioned:	30 January 1920 [1]
Decommissioned:	5 December 1922
Struck:	19 September 1930 [1]
Fate:	Scrapped 1931 [1]
General characteristics
Class and type:	AA-1 class diesel-electric submarine
Displacement:	1,107 tons (1,125 t) surfaced 1,482 tons (1,506 t) submerged [1]
Length:	268 ft 9 in (81.92 m) [1]
Beam:	22 ft 10 in (6.96 m) [1]
Draft:	14 ft 2 in (4.32 m) mean [1]
Propulsion:	4 × NELSECO diesel engines, total 4,000 bhp (3.0 MW) 2 × E.D. electric motors, total 1,350 bhp (1.0 MW) 2 screws [1]
Speed:	20 knots (37 km/h) surfaced 10.5 knots (19.4 km/h) submerged [1]
Test depth:	150 ft (46 m) [1]
Complement:	38 [1]
Armament:	8 × 18 in (457 mm) torpedo tubes  (four forward, four on deck) 2 × 3 in (76 mm) / 23 caliber deck guns [1]

The first USS T-1 (SS-52/SF-1) was an AA-1-class submarine in the service of the United States Navy; T-1 was also known as Schley and AA-1.

She was laid down as USS Schley on 21 June 1916 at the Fore River Shipbuilding Company yard in Quincy, Massachusetts by the Electric Boat Co. of New York, renamed AA-1 on 23 August 1917 to free the name "Schley" for Destroyer No. 103, launched on 25 July 1918, sponsored by Mrs. Lilian Hovey-King, and commissioned on 30 January 1920 at Boston, Massachusetts with Lt. Comdr James Parker, Jr. in command.

AA-1 was one of three boats designed and constructed under a project charged with developing fleet submarines; that is, undersea boats possessing the sea-keeping qualities and endurance capability required for long-range operations, as scouts for the surface fleet. On 17 July 1920, while the submarine was being fitted-out, the Navy adopted its modern system of alpha-numeric hull numbers, and the fleet submarine was designated SF-1. On 20 September, she was renamed T-1. Thus, by the time she began active service that fall, she was known as T-1 (SF-1).

T-1's commissioned service lasted less than three years. She operated out of Hampton Roads, Virginia, training crews and conducting maneuvers along the east coast with other units of the U.S. Atlantic Fleet. Throughout the entire period, she remained a unit of Submarine Division 15. However, during her service, flaws in her design and construction—particularly in her propulsion plant—became apparent. On 5 December 1922, T-1 was placed out of commission and laid up at the Submarine Base, Hampton Roads, Va. Later, she was moved to Philadelphia, Pennsylvania. After almost eight years of inactivity, her name was struck from the Navy list on 19 September 1930. Her hulk was broken up, and the materials were sold for scrap on 20 November 1930.

• USS T-1 and USS Schley for other ships of the same names.
• List of United States Navy submarines
• List of ship launches in 1918
• List of ship commissionings in 1920
• List of ship decommissionings in 1922

1. ^ ^{a b c d e f g h i j k l m n o} Bauer, K. Jack & Roberts, Stephen S. (1991), Register of Ships of the U.S. Navy, 1775-1990: Major Combatants, Westport, CT: Greenwood Press, ISBN 0-313-26202-0

• This article includes text from the public domain Dictionary of American Naval Fighting Ships.