USS Piper

History
United States
Builder	Portsmouth Naval Shipyard, Kittery, Maine
Laid down	15 March 1944
Launched	26 June 1944
Commissioned	23 August 1944
Decommissioned	16 June 1967
Stricken	1 July 1970
Fate	Sold for scrap, June 1971
General characteristics
Class & type	Balao class diesel-electric submarine
Displacement	1,526 tons (1,550 t) surfaced; 2,401 tons (2,440 t) submerged;
Length	311 ft 8 in (95.00 m)
Beam	27 ft 3 in (8.31 m)
Draft	16 ft 10 in (5.13 m) maximum
Propulsion	4 × Fairbanks-Morse Model 38D8-⅛ 10-cylinder opposed piston diesel engines driving electrical generators; 2 × 126-cell Sargo batteries; 2 × low-speed direct-drive Elliott electric motors; two propellers ; 5,400 shp (4.0 MW) surfaced; 2,740 shp (2.0 MW) submerged;
Speed	20.25 knots (38 km/h) surfaced; 8.75 knots (16 km/h) submerged;
Range	11,000 nautical miles (20,000 km) surfaced at 10 knots (19 km/h)
Endurance	48 hours at 2 knots (3.7 km/h) submerged; 75 days on patrol;
Test depth	400 ft (120 m)
Complement	10 officers, 70–71 enlisted
Armament	10 × 21-inch (533 mm) torpedo tubes; 6 forward, 4 aft; 24 torpedoes; 1 × 5-inch (127 mm) / 25 caliber deck gun; Bofors 40 mm and Oerlikon 20 mm cannon;

USS Piper (SS/AGSS-409), a Balao-class submarine, was a ship of the United States Navy named after the piper. Although built late in World War II, Piper completed three successful war patrols before the cessation of hostilities, operating as a life guard for plane strikes and as an advance picket for fast carrier task forces.