USS O-2

	USS O-2 (SS-63) diving, during training operations out of New London, Connecticut, 26 November 1943
History
United States
Name	O-2
Ordered	3 March 1916
Builder	Puget Sound Navy Yard, Bremerton, Washington
Cost	$698,412.51 (hull and machinery)
Laid down	7 July 1917
Launched	24 May 1918
Sponsored by	Mrs. Mary Chew
Commissioned	19 October 1918
Decommissioned	25 June 1931
Recommissioned	3 February 1941
Decommissioned	26 July 1945
Stricken	11 August 1945
Identification	Hull symbol: SS-63 (17 July 1920); Call sign: NETJ; ;
Fate	Sold for scrap, 16 November 1945
General characteristics
Class & type	O-1-class submarine
Displacement	520 long tons (528 t) surfaced; 629 long tons (639 t) submerged;
Length	172 ft 4 in (52.53 m)
Beam	18 ft (5.5 m)
Draft	14 ft 5 in (4.39 m)
Installed power	880 bhp (656 kW) diesel; 740 hp (552 kW) electric;
Propulsion	2 × NELSECO 6-EB-14 diesel engines; 2 × New York Navy Yard electric motors; 2 × 60-cell batteries; 2 × Propellers;
Speed	14 knots (26 km/h; 16 mph) surfaced; 10.5 knots (19.4 km/h; 12.1 mph) submerged;
Range	5,500 nmi (10,200 km) at 11.5 kn (21.3 km/h; 13.2 mph) surfaced; 250 nmi (460 km) at 5 kn (9.3 km/h; 5.8 mph) submerged;
Test depth	200 ft (61 m)
Capacity	21,897 US gal (82,890 L; 18,233 imp gal) fuel
Complement	2 officers; 27 enlisted;
Armament	4 × 18 inch (450 mm) bow torpedo tubes (8 torpedoes); 1 × 3 in (76 mm)/23 caliber retractable deck gun;

USS O-2 (SS-63), also known as "Submarine No. 63", was one of 16 O-class submarines of the United States Navy commissioned during World War I. She was recommissioned prior to the United States entry into WWII, for use as a trainer.