- 1st Naval Armaments Supplement Programme (Japan, 1931)
The 1st Naval Armaments Supplement Programme (マル1計画, 第一次補充計画 Maru 1 Keikaku, Dai-Ichi-Ji Hojū Keikaku ), otherwise known as the "Circle One" plan was the first of four expansion plans of the Imperial Japanese Navy between 1930 and the start of World War II.
The London Naval Treaty placed severe restrictions on Japan's naval capabilities vis-a-vis the United States Navy and the British Royal Navy in terms of tonnage and numbers of capital warships. The respose of the Imperial Japanese Navy General Staff was to initiate a construction program to build new warships to the allotted tonnage limits in each of the restricted categories, and to invest in types of warships and weaponry not specifically covered by the provisions of the treaty. 
The "Circle One" plan was submitted by the Naval Ministry and approved by the Cabinet in November 1930, and officially ratified by the Diet of Japan in 1931. It called for the construction of 39 new combat vessels, centering around four of the new Mogami-class cruisers, and expansion of the Imperial Japanese Navy Air Service to 14 Naval Air Groups. Budget for the construction pap smears 000 Yen for naval aviation expansion.
In terms of naval aviation development, the "Circle One" plan also concentrated on the development of new aircraft technologies, especially large seaplanes, land-based bombers, as well as carrier-based attack aircraft and floatplane attack aircraft that could be launched from battleships, cruisers or submarines. Attention was also given to training of pilots and air crews in dive bombing and torpedo tactics. 
Table of vessels
Category Class Planned Completed Converted Light cruiser Mogami 4 Mogami, Mikuma, Suzuya, Kumano Destroyer Hatsuharu 12 Hatsuharu, Nenohi, Wakaba, Hatsushimo, Ariake, Yūgure 6 vessels were converted to Shiratsuyu class Shiratsuyu Shiratsuyu, Shigure, Murasame, Yūdachi, Harusame, Samidare 6 vessels were converted from Hatsuharu class Torpedo boat Chidori 4 Chidori, Manazuru, Tomozuru, Hatsukari Cruiser submarine I-6 1 I-6 Large sized submarine I-68 6 I-68, I-69, I-70, I-71, I-72, I-73 Medium sized submarine Ro-33 2 Ro-33, Ro-34 Submarine tender Taigei 1 Taigei later converted to the aircraft carrier Ryūhō Minelayer Okinoshima 1 Okinoshima Natsushima 3 Natsushima, Nasami, Sarushima Minesweeper No.13 6 No.13 to No.18 Subchaser No.1 2 No.1 and No.2
- Evans, David (1979). Kaigun: Strategy, Tactics, and Technology in the Imperial Japanese Navy, 1887-1941. US Naval Institute Press. ISBN 0870211927.
- 2nd Naval Armaments Supplement Programme (Maru 2 Keikaku, 1934)
- 3rd Naval Armaments Supplement Programme (Maru 3 Keikaku, 1937)
- 4th Naval Armaments Supplement Programme (Maru 4 Keikaku, 1939)
- Temporal Naval Armaments Supplement Programme (Maru Rin Keikaku, 1940)
- Rapidly Naval Armaments Supplement Programme (Maru Kyū Keikaku, 1941)
- Additional Naval Armaments Supplement Programme (Maru Tui Keikaku, 1941)
- 5th Naval Armaments Supplement Programme (Maru 5 Keikaku, 1941)
- 6th Naval Armaments Supplement Programme (Maru 6 Keikaku, 1942)
- Modified 5th Naval Armaments Supplement Programme (Kai-Maru 5 Keikaku, 1942)
- Wartime Naval Armaments Supplement Programme (Maru Sen Keikaku, 1944)
Wikimedia Foundation. 2010.
Look at other dictionaries:
Modified 5th Naval Armaments Supplement Programme (Japan, 1942) — The Modified 5th Naval Armaments Supplement Programme (改マル5計画, 戦備促進第二次実行計画, Kai Maru 5 Keikaku, Senbi Sokushin Dai Ni Ji Jikkō Keikaku?) was one of the wartime armaments expansion plans of the Imperial Japanese Navy (IJN). Contents 1 Bac … Wikipedia
India — /in dee euh/, n. 1. Hindi, Bharat. a republic in S Asia: a union comprising 25 states and 7 union territories; formerly a British colony; gained independence Aug. 15, 1947; became a republic within the Commonwealth of Nations Jan. 26, 1950.… … Universalium
M. N. Roy — M.N. Roy মানবেন্দ্রনাথ রায় Manabendra Nath Roy Born 21 March 1887(1887 03 21) Changripota, 24 Parganas, Bengal, British India … Wikipedia