USS Porpoise (SS-172)

	USS Porpoise (SS-172)
History
United States
Builder	Portsmouth Naval Shipyard, Kittery, Maine
Laid down	27 October 1933
Launched	20 June 1935
Commissioned	15 August 1935
Stricken	13 August 1956
Fate	Sold for scrap 14 May 1957
General characteristics
Class & type	Porpoise-class diesel-electric submarine
Displacement	1,310 long tons (1,330 t) standard, surfaced, 1,934 long tons (1,965 t) submerged
Length	283 ft 0 in (86.26 m) (waterline), 301 ft 0 in (91.74 m) (overall)
Beam	24 ft 11+3⁄4 in (7.614 m)
Draft	13 ft 10 in (4.22 m)
Propulsion	As Built: 4 × Winton Model 16-201A 16-cylinder two-cycle diesel engines, 1,300 hp (970 kW) each, driving electrical generators through reduction gears, 2 × 120-cell Exide VL31B batteries, 4 × high-speed Elliott electric motors, total 2,085 hp (1,555 kW) three General Motors six-cylinder four-cycle 6-228 auxiliary diesels; Re-engined (1942): 4 × GM two-cycle Model 12-278A diesels, 1,200 hp (0.89 MW) each, two shafts;
Speed	19 kn (35 km/h) surfaced, 8 kn (15 km/h) submerged
Range	6,000 nmi (11,000 km) at 10 kn (19 km/h), 22,000 nmi (41,000 km) @ 8 kn (15 km/h) with fuel in the main ballast tanks, (bunkerage 93,129 US gallons (352,530 L) maximum, 89,945 US gallons (340,480 L) typical, 1944)
Endurance	10 hours @ 5 kn (9.3 km/h), 36 hours at minimum speed submerged
Test depth	250 ft (76 m)
Complement	5 officers, 9 chief petty officers, 42 enlisted (1944)
Armament	6 × 21 inch (533 mm) torpedo tubes (four forward, two aft; 16 torpedoes), (two external bow tubes added 1942), 1 × 3 in (76 mm)/50 cal deck gun, 2 × 0.3 cal (7.62 mm) machineguns

USS Porpoise (SS–172), the fifth United States Navy ship to bear her name, was the lead ship of her class of submarines.