USS O-7

	USS O-7 (SS-68) possibly in October 1944, in the Atlantic, south of Fishers Island
History
United States
Name	O-7
Ordered	3 March 1916
Builder	Fore River Shipbuilding Company, Quincy, Massachusetts
Cost	$521,016.74 (hull and machinery)
Laid down	14 February 1917
Launched	16 December 1917
Sponsored by	Miss Constance Sears
Commissioned	4 July 1918
Decommissioned	1 July 1931
Recommissioned	12 February 1941
Decommissioned	2 July 1945
Stricken	11 July 1945
Identification	Hull symbol: SS-68 (17 July 1920); Call sign: NAMC; ;
Fate	Sold for scrap, 22 January 1946
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 × Electro-Dynamic Company 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-7 (SS-68), also known as "Submarine No. 68", 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.