USS Adder

	USS Adder running trials in Long Island Sound, 1903
History
United States
Name	Adder
Namesake	The adder
Ordered	7 June 1900
Awarded	25 August 1900
Builder	Crescent Shipyard, Elizabethport, New Jersey
Laid down	3 October 1900
Launched	22 July 1901
Sponsored by	Mrs. Jane S. Wainwright
Commissioned	12 January 1903
Decommissioned	26 July 1909
Recommissioned	10 February 1910
Decommissioned	12 December 1919
Renamed	A-2 (Submarine Torpedo Boat No. 3), 17 November 1911
Stricken	16 January 1922
Identification	Hull symbol: SS-3 (17 July 1920); Call sign: NBF; ;
Fate	Designated for use as a target, 24 September 1920 and expended mid-January 1922
General characteristics
Class & type	Plunger-class submarine
Displacement	107 long tons (109 t) surfaced; 123 long tons (125 t) submerged;
Length	63 ft 10 in (19.46 m)
Beam	11 ft 11 in (3.63 m)
Draft	10 ft 7 in (3.23 m)
Installed power	160 bhp (120 kW) surfaced ; 150 bhp (110 kW) submerged;
Propulsion	1 × Otto Gas Engine Works gas engine; 1 × Electro Dynamic electric motor; 60-cell battery; 1 × shaft;
Speed	8 kn (15 km/h; 9.2 mph) surfaced; 7 kn (13 km/h; 8.1 mph) submerged;
Test depth	150 ft (45.7 m)
Complement	1 officer; 6 enlisted;
Armament	1 × 17.7 in (450 mm) "18-in" torpedo tube (5 torpedoes)
Armor	Conning tower: 3+5⁄8 in (92 mm)

USS Adder/A-2 (SS-3), also known as "Submarine Torpedo Boat No. 3", was one of seven Plunger-class submarines built for the United States Navy (USN) in the first decade of the 20th century. She was named for the adder. Used primarily for training, she served as harbor defense in Manila Bay, during WWI.