I-52-class submarine

Class overview
Builders:	Mitsubishi
Operators:	Imperial Japanese Navy
Preceded by:	Type C submarine
Built:	1942–1944
In commission:	1943–1945
Planned:	20
Completed:	3
Lost:	2
General characteristics
Displacement:	2,095 tonnes standard 2,564 tonnes surfaced 3,644 tonnes submerged
Length:	356 ft 6 in (108.66 m)
Beam:	30 ft 6 in (9.30 m)
Draft:	16 ft 9 in (5.11 m)
Propulsion:	Diesel-electric 2 diesels, 4,700 hp (3.5 MW) surfaced Electric motors, 1,200 hp (895 kW) submerged
Speed:	17.75 knots (32.87 km/h) surfaced 6.5 knots (12 km/h) submerged
Range:	21,000 nmi (39,000 km) at 16 kn (30 km/h)
Test depth:	100 m (330 ft)
Complement:	94 officers and men
Armament:	2 × 140 mm (5.5 in)/40 calibre deck gun 6 × 533 mm (21 in) torpedo tubes (bow) 19 × Type 95 torpedoes

The Type C3 submarine (巡潜丙型改潜水艦, Junsen Hei-gata kai sensuikan, "Cruiser submarine type C modified"), also called I-52-class submarine (伊五十二型潜水艦, I-go-jū-ni-gata sensuikan) were operated by the Imperial Japanese Navy, designed and built by Mitsubishi Corporation, between 1943 and 1944, as cargo carriers.

The Japanese constructed only three of these during World War II, although twenty were planned. They were among the largest submarines ever built to date, and were known as the most advanced submarines of the period.

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