No.1-class auxiliary submarine chaser

From Wikipedia, the free encyclopedia
Jump to: navigation, search
IJN auxiliary submarine chaser No1 class 1945.jpg
No.1 class on 10 January 1945
Class overview
Name: No.1-class auxiliary submarine chaser
Builders: Hull
Ichikawa Shipyard
Gōriki Shipyard
Koyanagi Shipyard
Saga Iron Works
Shikoku Dock Company
Jinen Iron Works
Tokushima Limited Sipyard
Nishii Shipyard
Hayashikane Heavy Industries
Fukuoka Iron Works
Fukushima Iron Works
Funaya Iron Works
Miho Shipyard
Murakami Shipyard
Yamanishi Iron Works
Yonago Shipyard
Fitted with armaments
Kure Naval Arsenal
Maizuru Naval Arsenal
Sasebo Naval Arsenal
Yokosuka Naval Arsenal
Operators: Naval Ensign of Japan.svg Imperial Japanese Navy
Ensign of the Japanese Coast Guard.svg Japan Maritime Safety Agency
Naval Ensign of Japan.svg Japan Coastal Safety Force (later Japan Maritime Self-Defence Force)
Flag of Japan.svg Government of Japan
Flag of the Republic of China.svg Republic of China Navy
Naval Ensign of the People's Republic of China.svg People's Liberation Army Navy
Built: 1942 (?)–1945
In commission: 1943–1971
Planned: 200
Completed: 200
Lost: 81
Retired: 119
General characteristics
Type: Submarine chaser
Displacement: 130 long tons (132 t) standard
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
Speed: 11.0 knots (12.7 mph; 20.4 km/h)
Range: 1,000 nmi (1,900 km) at 10.0 kn (11.5 mph; 18.5 km/h)
Complement: 32
Armament: • 1 × 7.7 mm machine gun
• 22 × depth charges
• 1 × dunking hydrophone
• 1 × simple sonar

The No.1 class auxiliary submarine chaser (第一号型駆潜特務艇, Dai Ichi Gō-gata Kusen-Tokumutei?) was a class of submarine chasers of the Imperial Japanese Navy (IJN), serving during World War II. 200 vessels were built under the Maru Kyū Programme (Ship # 500–599) and the Maru Sen Programme (Ship # 2001–2100).


  • In 1939, the IJN wanted the point-defence subchaser for defence of their naval bases. In 1940, they built small prototype submarine chasers (No.1182 and No.1183) from a standard wooden fishing boat.
  • The IJN made a try of them, and they confirmed that it was effective subchaser. In 1941, the IJN ordered 100 vessels.
  • In the wartime, their performance were good. However, they were always troubled by insect damage, because their hull was wood.
  • They who survived war played an active part for minesweeping of magnetic mines.

Ships in class[edit]

Maru Kyū Programme vessels. (Ship # 500–599)

  • Aux. Submarine Chaser No.71, completed on 30 October 1943, survived war. Transferred to Japan Maritime Safety Agency as patrol boat and renamed Hōjiro (PS-39) on 1 May 1948. Discarded 1964.[1]
  • Aux. Submarine Chaser No.72, completed on 20 December 1943, survived war. Transferred to Japan Maritime Safety Agency as minesweeper and renamed Umitsubame (MS 07) on 1 May 1948. To Maritime Self Defense Force 1954. Renumbered MSI 697. Transferred to habour service 1961.[1]
  • Aux. Submarine Chaser No.73, completed on 22 December 1943, sunk by USS Bearss on 26 June 1945.
  • Aux. Submarine Chaser No.74, completed on 17 November 1943, survived war.
  • Aux. Submarine Chaser No.75, completed on 8 February 1944, survived war.
  • Aux. Submarine Chaser No.76, completed on 1 January 1944, sunk in action on 11 December 1944.
  • Aux. Submarine Chaser No.77, completed on 20 December 1943, sunk in action on 28 August 1944.
  • Aux. Submarine Chaser No.78, completed on 15 October 1943, survived war. Transferred to Japan Maritime Safety Agency and renamed Ōtori (PS-28) on 1 May 1948. Redesignated MS 82 1953. Transferred to Maritime Self Defense Force 1954. Discarded 1959[1]
  • Aux. Submarine Chaser No.79, completed on 26 February 1944, survived war. Transferred to Japan Maritime Safety Agency and renamed MS 08 on 1 May 1948.
  • Aux. Submarine Chaser No.80, completed on 15 December 1943, survived war. Transferred to Japan Maritime Safety Agency and renamed Sekirei (PB-08) on 1 May 1948.

Maru Sen Programme vessels. (Ship # 2001–2100)

No.169, No.173, No.99 and No.234 in 1946


  1. ^ a b c d e f g h Gardiner and Chumbley 1995, p. 221.


  • Gardiner, Robert and Stephen Chumbley. Conway's All The World's Fighting Ships 1947–1995. Annapolis, Maryland, USA: Naval Institute Press, 1995. ISBN 1-55750-132-7.
  • Ships of the World special issue Vol.45, Escort Vessels of the Imperial Japanese Navy, Kaijinsha, (Japan), February 1996
  • The Maru Special-Japanese Naval Vessels No.49, Japanese submarine chasers, Ushio Shobō (Japan), March 1981