CH-4 (submarine)

History
Empire of Japan
Name	CH-4
Builder	Sakurajima Zosensho, Osaka
Laid down	1 January 1938
Launched	13 September 1938
Completed	28 December 1938
Commissioned	28 December 1938
Decommissioned	3 May 1947
Out of service	13 August 1945
General characteristics
Type	Submarine chaser
Displacement	291 long tons (296 t) standard; 309 long tons (314 t) trial;
Length	56.2 m (184 ft 5 in) overall; 55.5 m (182 ft 1 in) waterline;
Beam	5.6 m (18 ft 4 in)
Draught	2.1 m (6 ft 11 in)
Propulsion	2 × Kampon Mk.22 Model 6 diesels, 2 shafts, 2,600 bhp
Speed	20.0 knots (23.0 mph; 37.0 km/h)
Range	2,000 nmi (3,700 km) at 14 kn (16 mph; 26 km/h)
Complement	59
Armament	2 × 40 mm heavy machine guns; 36 × depth charges; 2 × Type 94 depth charge projectors; 1 × depth charge thrower; 1 × Type 93 active sonar; 1 × Type 93 hydrophone; No.4, November 1944; 2 × 40 mm heavy machine guns; 3 × Type 96 25 mm AA guns; 36 × depth charges; 2 × Type 94 depth charge projectors; 2 × depth charge throwers (estimate); 1 × 13-Gō surface search radar; 1 × Type 3 active sonar; 1 × Type 93 hydrophone;

CH-4 was a No.4-class submarine chaser of the Imperial Japanese Navy during World War II.

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