No.1 class auxiliary patrol boat - AbsoluteAstronomy.com

The was a class of patrol boat (picket boat) of the Imperial Japanese Navy

Imperial Japanese Navy

The Imperial Japanese Navy was the navy of the Empire of Japan from 1869 until 1947, when it was dissolved following Japan's constitutional renunciation of the use of force as a means of settling international disputes...

(IJN), serving during World War II

World War II

World War II, or the Second World War , was a global conflict lasting from 1939 to 1945, involving most of the world's nations—including all of the great powers—eventually forming two opposing military alliances: the Allies and the Axis...

. 280 vessels were planned under the Maru Sen Programme

Wartime Naval Armaments Supplement Programme (Japan, 1944)

The was the final armaments expansion plan of the Imperial Japanese Navy .-Background:Early 1944, the IJN started building warships for war. The plan did not include any large warships which were suitable for offensive operations.-Table of vessels:...

(Ship # 2121–2400), however, only 27 vessels were completed before the end of the war.

Background

In the wartime, Japan commandeered a lot of fishing boats for picket boat, and watched the east surface of the sea of the Japan mainland. Their duties were early warning of the U.S. Task Force which came close to the Japan mainland. And some fishing boats accomplished their duties, however, it was their death and exchange. IJN decided to build a specialized picket boat, because their damages were piled up.
The IJN intended to build 280 picket boats, however, the IJN was not able to prepare wood to build it. The IJN built only 27 vessels until the end of the war. They who survived war played an active part for minesweeping of magnetic mines with the No.1-class auxiliary submarine chaser
No.1 class auxiliary submarine chaser
The was a class of submarine chasers of the Imperial Japanese Navy , serving during World War II. 200 vessels were built under the Maru Kyū Programme and the Maru Sen Programme .-Background:...

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Ships in class

Auxiliary Patrol Boat No.1, completed on 28 March 1945, survived war.
Auxiliary Patrol Boat No.2, completed on 20 May 1945, survived war.
Auxiliary Patrol Boat No.3, completed on 5 August 1945, survived war.
Auxiliary Patrol Boat No.4, incomplete, rebuilt to fishing boat in postwar.
Ship No.2125 to No.2144, cancelled in 1945.
Auxiliary Patrol Boat No.25, completed on 27 April 1945, survived war, sunk by rough weather on 18 September 1945.
Auxiliary Patrol Boat No.26, completed on 2 August 1945, survived war, rebuilt to fishing boat in postwar.
Auxiliary Patrol Boat No.27, incomplete, scrapped in postwar.
Ship No.2148 to No.2150, cancelled in 1945.
Auxiliary Patrol Boat No.31, completed on 29 July 1945, survived war, transferred to Japan Maritime Safety Agency and renamed MS 18 on 1 May 1948.
Auxiliary Patrol Boat No.32, incomplete, rebuilt to fishing boat in postwar.
Auxiliary Patrol Boat No.33, 90 % complete, rebuilt to fishing boat in postwar.
Auxiliary Patrol Boat No.34, 80 % complete, rebuilt to fishing boat in postwar.
Ship No.2155 and 2156, cancelled in 1945.
Auxiliary Patrol Boat No.37, completed on 2 June 1945, sunk by air raid on 18 July 1945 at Yokosuka
Yokosuka, Kanagawa
is a city located in Kanagawa, Japan. As of 2010, the city had an estimated population of 419,067 and a population density of 4,160 people per km². It covered an area of 100.62 km²...

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Auxiliary Patrol Boat No.38, 90 % complete, scrapped in postwar.
Ship No.2159 to No.2173, cancelled in 1945.
Auxiliary Patrol Boat No.54, completed on 5 August, survived war, filled and sunk in postwar.
Auxiliary Patrol Boat No.55, 95 % complete.
Ship No.2176 to No.2183, cancelled in 1945.
Auxiliary Patrol Boat No.64, incomplete, rebuilt to fishing boat in postwar.
Auxiliary Patrol Boat No.65, 90 % complete, rebuilt to fishing boat in postwar.
Auxiliary Patrol Boat No.66, 80 % complete.
Ship No.2187 to No.2203, cancelled in 1945.
Auxiliary Patrol Boat No.84, completed on 7 June 1945, survived war, transferred to Japan Maritime Safety Agency and renamed MS 19 on 1 May 1948.
Auxiliary Patrol Boat No.85, 95 % complete, rebuilt to fishing boat in postwar.
Auxiliary Patrol Boat No.86, 70 % complete.
Ship No.2207 to No.2209, cancelled in 1945.
Auxiliary Patrol Boat No.90, completed on 11 April 1945, survived war, struck a naval mine and sunk in postwar.
Auxiliary Patrol Boat No.91, 99 % complete.
Auxiliary Patrol Boat No.92, 95 % complete.
Auxiliary Patrol Boat No.93, 80 % complete.
Ship No.2214 to No.2229, cancelled in 1945.
Auxiliary Patrol Boat No.110, incomplete, sunk by air raid on 18 July 1945 at Yokosuka.
Auxiliary Patrol Boat No.111, 99 % complete.
Ship No.2232 to No.2241, cancelled in 1945.
Auxiliary Patrol Boat No.122, incomplete, sunk by air raid on 18 July 1945 at Yokosuka.
Auxiliary Patrol Boat No.123, incomplete.
Ship No.2244 to No.2252, cancelled in 1945.
Auxiliary Patrol Boat No.134, completed on 26 February 1945, survived war, transferred to Japan Maritime Safety Agency and renamed MS 20 on 1 May 1948.
Auxiliary Patrol Boat No.135, completed on 23 May 1945, survived war, transferred to Japan Maritime Safety Agency and renamed MS 21 on 1 May 1948.
Auxiliary Patrol Boat No.136, completed on 5 June 1945, survived war, transferred to Japan Maritime Safety Agency and renamed MS 22 on 1 May 1948.
Auxiliary Patrol Boat No.137, completed on 15 July 1945, survived war, sunk by rough weather on 18 April 1946.
Auxiliary Patrol Boat No.138, completed on 11 August 1945, survived war, transferred to Japan Maritime Safety Agency and renamed MS 23 on 1 May 1948.
Auxiliary Patrol Boat No.139, incomplete, transferred to Japan Maritime Safety Agency and renamed MS 24 on 1 May 1948.
Auxiliary Patrol Boat No.140, 90 % complete.
Ship No.2261 to No.2271, cancelled in 1945.
Auxiliary Patrol Boat No.152, completed on 23 May 1945, survived war, transferred to Japan Maritime Safety Agency and renamed MS 25 on 1 May 1948.
Auxiliary Patrol Boat No.153, completed on 23 July 1945, survived war, transferred to Japan Maritime Safety Agency and renamed MS 26 on 1 May 1948.
Auxiliary Patrol Boat No.154, incomplete, transferred to Japan Maritime Safety Agency and renamed MS 27 on 1 May 1948.
Auxiliary Patrol Boat No.155, 90 % complete.
Auxiliary Patrol Boat No.156, incomplete.
Ship No.2277 to No.2282, cancelled in 1945.
Auxiliary Patrol Boat No.163, completed on 10 February 1945, survived war, struck a naval mine and sunk on 22 August 1945.
Auxiliary Patrol Boat No.164, completed on 2 March 1945, agrounded on 30 May 1945, later scrapped.
Auxiliary Patrol Boat No.165, completed on 15 May 1945, survived war, filled and sunk in postwar.
Auxiliary Patrol Boat No.166, completed on 23 July 1945, sunk by air raid on 12 August 1945 off Onomichi
Onomichi, Hiroshima
is a city located in Hiroshima Prefecture, Japan, facing the Inland Sea.As of January 1, 2008, the city has an estimated population of 148,085 and a population density of 520 persons per km². The total area is 284.85 km²...

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Ship No.2287 to No.2292, cancelled in 1945.
Auxiliary Patrol Boat No.173, completed on 26 March 1945, struck a naval mine and sunk on 29 March 1945, later refloated and scrapped.
Auxiliary Patrol Boat No.174, completed on 10 May 1945, survived war.
Auxiliary Patrol Boat No.175, completed on 23 June 1945, survived war, transferred to Japan Maritime Safety Agency and renamed MS 28 on 1 May 1948.
Auxiliary Patrol Boat No.176, incomplete, sunk by rough weather on 18 April 1946.
Auxiliary Patrol Boat No.177, incomplete, burned by air raid on 4 July 1945.
Auxiliary Patrol Boat No.178, incomplete, burned by air raid on 4 July 1945.
Auxiliary Patrol Boat No.179, completed on 20 May 1945, survived war, transferred to Japan Maritime Safety Agency and renamed MS 29 on 1 May 1948.
Auxiliary Patrol Boat No.180, incomplete, filled and sunk in postwar.
Auxiliary Patrol Boat No.181, incomplete.
Ship No.2302 to No.2310, cancelled in 1945.
Auxiliary Patrol Boat No.191, completed on 27 March 1945, survived war, transferred to Japan Maritime Safety Agency and renamed MS 30 on 1 May 1948.
Auxiliary Patrol Boat No.192, completed on 27 July 1945, agrounded on 27 October 1945, later scrapped.
Auxiliary Patrol Boat No.193, 70 % complete, sunk by typhoon on 18 September 1945.
Ship No.2314 to No.2400, cancelled in 1945.

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