Japanese submarine I-171

I-171 (right) anchored at Paramushiro in the Kurile Islands in June 1943. The auxiliary submarine tender Heian Maru is at left.
History
Empire of Japan
Name	I-71
Builder	Kawasaki Kobe Yard, Kobe, Japan
Laid down	15 February 1933
Launched	15 August 1934
Completed	24 December 1935
Commissioned	24 December 1935
Renamed	I-171, 20 May 1942
Fate	Sunk 1 February 1944
Stricken	30 April 1944
General characteristics
Class and type	KD6 Type, Kadai type submarine
Displacement	1,400 (1,785 maximum) tons surfaced 2,440 tons submerged[1]
Length	322 ft 10 in (98.4 m)
Beam	26 ft 11 in (8.2 m)
Draught	15 ft 0 in (4.6 m)
Propulsion	Twin shaft Kampon 9,000 bhp (6,711 kW)/two stroke diesels
Speed	23 knots (43 km/h; 26 mph) diesel 8.2 knots (15.2 km/h; 9.4 mph) electric[1]
Range	14,000 nmi (26,000 km; 16,000 mi)[1]
Test depth	230 ft (70 m)
Complement	60–84 officers and enlisted
Armament	6 x torpedo tubes/14 21 in (533 mm) torpedoes 1 x 100 mm (3.9 in) AA gun 1 × 13.2 mm (0.52 in) AA gun

I-71, later I-171, was a Kaidai-class cruiser submarine of the KD6 sub-class built for the Imperial Japanese Navy during the 1930s. She served in World War II, and took part in operations supporting the attack on Pearl Harbor, the Battle of Midway, and the Aleutian Islands campaign. She was sunk on1 February 1944 after being detected on the surface by U.S. Navy destroyers off Buka Island.