Japanese submarine chaser Cha-42

History
Empire of Japan
Name	Cha-42
Laid down	10 July 1942
Launched	7 June 1943
Completed	27 August 1943
Commissioned	27 August 1943
Stricken	3 May 1947
Homeport	Sasebo
Fate	Torpedoed and sunk by USS Hardhead, 23 June 1945
General characteristics
Class & type	No.1-class submarine chaser
Displacement	130 long tons (132 t) standard[1]
Length	29.20 m (95 ft 10 in) overall
Beam	5.65 m (18 ft 6 in)
Draught	1.97 m (6 ft 6 in)
Propulsion	1 × intermediate diesel shingle shaft, 400 bhp (300 kW)
Speed	11.0 knots (20.4 km/h; 12.7 mph)
Range	1,000 nmi (1,900 km; 1,200 mi) at 10.0 kn (18.5 km/h; 11.5 mph)
Complement	32
Sensors & processing systems	1 × dunking hydrophone 1 × simple sonar
Armament	1 × 7.7 mm machine gun 22 × depth charges From mid 1943, the 7.7 mm machine gun was replaced with a 13.2 mm machine gun

Cha-42 or No. 42 (Japanese: 第四十二號驅潜特務艇) was a No.1-class submarine chaser of the Imperial Japanese Navy that served during World War II.

She was laid down on 10 July 1942 and launched on 7 June 1943.^[2] On 27 August 1943, she was completed, commissioned, and assigned to the Sasebo Defense Force, Sasebo Naval District.^[2] On 15 October 1943, she was reassigned to the 31st Guard Unit Unit, Manila.^[2] On 20 February 1945, she was reassigned to the 21st Special Base Force, Surabaya, Java.^[2]

On 23 June 1945, she was attacked and sunk by a torpedo from the American submarine USS Hardhead southeast of the Masalembu Islands at 05°44′S 114°16′E / 5.733°S 114.267°E / -5.733; 114.267.^[2][3] She was removed from the Navy List on 3 May 1947.^[2]