Английская Википедия:Etorofu-class escort ship
Шаблон:Infobox ship imageШаблон:Infobox ship class overviewШаблон:Infobox ship characteristics
The Шаблон:Nihongo were a group of fourteen kaibōkan escort vessels built for the Imperial Japanese Navy during World War II. Eight of the fourteen ships were sunk during the war. The class was also referred to by internal Japanese documents as the Шаблон:Nihongo.
Background
The Shimushu-class kaibōkan, as with the Шаблон:Sclass torpedo boat, was a consequence of the 1930 London Naval Treaty, which placed limitations on the total destroyer tonnage the Imperial Japanese Navy was permitted. One way in which the treaty could be circumvented was to use a loophole in the treaty which permitted ships of between 600 and 2,000 tons, with no more than four guns over Шаблон:Convert, no torpedoes, and with a maximum speed of no more than Шаблон:Convert. A new class of vessel was designed to use this loophole, and was given the obsolete designation of kaibōkan (Kai = sea, ocean, Bo = defence, Kan = ship), which had previously been used to designate obsolete battleships which had been reassigned to coastal defense duties. Immediately before the start of then Pacific War, the Imperial Japanese Navy suddenly decided to give more priority to convoy escorts, possibly in light of the ongoing successes of German U-boats against British shipping in the Atlantic. As the Shimushu class was not suited for mass-production and took too long to build, the 1941 Rapid Naval Armaments Supplement Programme authorized thirty modified versions of the Shimushu class, which were designated the Etorofu class.[1] However, sixteen of the projected thirty ships were subsequently re-ordered to the subsequent Mikura, Hiburi or Ukura designs.
Production began between February 1942 and August 1943. Despite simplification, the design was still too complex for mass production and one of the ships was not completed until early 1944.[1]
Description
The Etorofu class was almost identical to the Shimushu class but with a simplified bow, stern and bridge structure to facilitate production. The ships measured Шаблон:Convert overall, with a beam of Шаблон:Convert and a draft of Шаблон:Convert.[2] They displaced Шаблон:Convert at standard load and Шаблон:Convert at deep load. The ships had two diesel engines, each driving one propeller shaft, which were rated at a total of Шаблон:Convert for a speed of Шаблон:Convert. The ships had a range of Шаблон:Convert at a speed of Шаблон:Convert.[3]
As with the Shimushu class the main battery of the Etorofu class consisted of three [[Type 3 120 mm 45 caliber naval gun|Type 3 Шаблон:Convert guns]] in single mounts, one superfiring pair aft and one mount forward of the superstructure. Anti-aircraft protection was by four [[Type 96 25 mm AT/AA Gun|Type 96 Шаблон:Convert]] anti-aircraft guns in two twin-gun mounts abreast the bridge. However, for a ship supposedly designed for convoy escort, only one Model 94 depth charge launcher was installed on the quarterdeck along with a Model 3 loading frame. The number of depth charges was initially 36, but this was increased to 60 while the ships were still in production, which necessitated the deletion of the two paravanes initially in the design for minesweeping. The ships were also equipped with a Model 93 sonar and a Type 93 hydrophone.[1]
During the Pacific War, the number of Type 96 anti-aircraft gun was increased to five triple-mounts and a varying number of single-mounts, up to 15 in total by August 1943. A Type 22 and Type 13 radar were also installed. A [[Type 97 81 mm infantry mortar|Type 97 Шаблон:Convert trench mortar]] was also installed front of the bridge[3]
Operational service
The Etorofu class proved to be an inadequate design by the time the final units entered service in 1944. Their speed was slower than most submarines, and with only one depth charge projector, their combat capability against the increasingly effective United States Navy submarine forces was ineffective. The Etorofu-class vessels were mostly deployed to the South China Sea or East China Sea as convoy escorts, but few recorded any attacks against Allied submarines. Conversely, six of the 14 ships in the class were sunk by American submarines. Of the six survivors, three were used as repatriation ships after the war, and were subsequently given as prize of war to Allied navies.[1]
Ships in class
Thirty ships (numbered #310 to #339) were included in the Rapid Naval Armaments Supplement Programme in 1941. These are listed below with the shipyard to which each was allocated:
| Number | Name | Builder |
|---|---|---|
| #310 | Etorofu | Hitachi-Sakurajima Shipyards |
| #311 | Matsuwa | Mitsui-Tamano Shipyards |
| #312 | Sado | NKK-Tsurumi Shipyards |
| #313 | Oki | Uraga Dock Company |
| #314 | Matsure | Hitachi-Sakurajima Shipyards |
| #315 | Iki | Mitsui-Tamano Shipyards |
| #316 | Tsushima | NKK-Tsurumi Shipyards |
| #317 | Wakamiya | Mitsui-Tamano Shipyards |
| #318 | Hirado | Hitachi-Sakurajima Shipyards |
| #319 | Fukae | Uraga Dock Company |
| #320 | Mikura | NKK-Tsurumi Shipyards |
| #321 | Amakusa | Hitachi-Sakurajima Shipyards |
| #322 | Miyake | NKK-Tsurumi Shipyards |
| #323 | Manju | Mitsui-Tamano Shipyards |
| #324 | Awaji | Hitachi-Sakurajima Shipyards |
| Number | Name | Builder |
|---|---|---|
| #325 | Kanju | Uraga Dock Company |
| #326 | Nōmi | Hitachi-Sakurajima Shipyards |
| #327 | Kurahashi | NKK-Tsurumi Shipyards |
| #328 | Hiburi | Hitachi-Sakurajima Shipyards |
| #329 | Chiburi | NKK-Tsurumi Shipyards |
| #330 | Kasado | Uraga Dock Company |
| #331 | Yashiro | Hitachi-Sakurajima Shipyards |
| #332 | Ukuru | NKK-Tsurumi Shipyards |
| #333 | Daitō | Hitachi-Sakurajima Shipyards |
| #334 | Kusagaki | NKK-Tsurumi Shipyards |
| #335 | Okinawa | NKK-Tsurumi Shipyards |
| #336 | Amami | NKK-Tsurumi Shipyards |
| #337 | Aguni | NKK-Tsurumi Shipyards |
| #338 | Shinnan | Uraga Dock Company |
| #339 | Shōnan | Hitachi-Sakurajima Shipyards |
While fourteen of the above ships were completed to the Etorofu design, eight ships - Mikura (#320), Miyake (#322), Awaji (#324), Nōmi (#326), Kurahashi (#327), Chiburi (#329), Yashiro (#331) and Kusagaki (#334) - were altered to be built to the Mikura design; three ships - Hiburi (#328), Daitō (#333) and Shōnan (#339) - were altered to be built to the Hiburi design; and five ships - Ukuru (#332), Okinawa (#335), Amami (#336), Aguni (#337) and Shinnan (#338) - were altered to be built to the 'Ukuru design. The fourteen completed to the (original) Etorofu design were as follows:
| Kanji | Name | Builder | Laid down | Launched | Completed | Fate |
|---|---|---|---|---|---|---|
| 択捉 | Шаблон:Ship | Hitachi-Sakurajima Shipyards | 23 February 1942 | 29 January 1943 | 15 May 1943 | Ceded to the United States, 1946. Scrapped 1947 |
| 松輪 | Шаблон:Ship | Mitsui-Tamano Shipyards | 20 April 1942 | 13 November 1942 | 23 March 1943 | Sunk by Шаблон:USS on 22 August 1944, Hidai Bay, Philippines [14-15N, 120-25E] |
| 佐渡 | Шаблон:Ship | NKK-Tsurumi Shipyards | 21 February 1942 | 28 November 1942 | 27 March 1943 | Sunk by Шаблон:USS on 22 August 1944, Hidai Bay, Philippines [14-15N, 120-25E] |
| 隠岐 | Шаблон:Ship | Uraga Dock Company | 27 February 1942 | 20 October 1942 | 28 March 1943 | Ceded to Republic of China Navy as Gu An (固安) in August 1947, captured by PLAN and renamed Chang Bai (长白) in 1949, scrapped 1982 |
| 六連 | Шаблон:Ship | Hitachi-Sakurajima Shipyards | 25 July 1942 | 10 April 1943 | 31 July 1943 | Sunk by Шаблон:USS on 2 September 1943, Philippine Sea [08-40N, 151-31E] |
| 壱岐 | Шаблон:Ship | Mitsui-Tamano Shipyards | 2 May 1942 | 5 February 1943 | 31 May 1943 | Sunk by Шаблон:USS on 24 May 1944, 150 miles W of Sarawak |
| 対馬 | Шаблон:Ship | NKK-Tsurumi Shipyards | 20 June 1942 | 20 March 1943 | 28 July 1943 | Ceded to Republic of China Navy as Lin An (臨安) 31 July 1947, scrapped 1963 |
| 若宮 | Шаблон:Ship | Mitsui-Tamano Shipyards | 16 July 1942 | 19 April 1943 | 10 August 1943 | Sunk by Шаблон:USS on 24 May 1944, East China Sea [28-38N, 122-05E] |
| 平戸 | Шаблон:Ship | Hitachi-Sakurajima Shipyards | 2 November 1942 | 30 June 1943 | 28 September 1943 | Sunk by Шаблон:USS on 12 September 1944, South China Sea [17-54N, 114-49] |
| 福江 | Шаблон:Ship[4] | Uraga Dock Company | 30 October 1942 | 2 April 1943 | 28 June 1943 | Ceded to UK in July 1947, scrapped |
| 天草 | Шаблон:Ship | Hitachi-Sakurajima Shipyards | 5 April 1943 | 30 September 1943 | 20 November 1943 | Sunk by Royal Navy aircraft 9 August 1945, Onagawa, Japan |
| 満珠 | Шаблон:Ship | Mitsui-Tamano Shipyards | 15 February 1943 | 31 July 1943 | 30 November 1943 | Scrapped 1946 |
| 干珠 | Шаблон:Ship | Uraga Dock Company | 8 April 1943 | 7 August 1943 | 30 October 1943 | Scuttled after mine damage, 15 August 1945, near Wonson, Korea [39-10N, 127-27E.] |
| 笠戸 | Шаблон:Ship | Uraga Dock Company | 10 August 1943 | 9 December 1943 | 27 February 1944 | Scrapped 1948 |
Notes
References
External links
Шаблон:Mitsui Engineering & Shipbuilding Шаблон:WWII Japanese ships
