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Type A Submarine
The was a class of submarine in the Imperial Japanese Navy (IJN), which served during the Second World War. The ''Type-A'' submarines were built to take a role of the command ships for submarine squadrons. For this reason they had equipment for a headquarters, better radio facilities and a floatplane. Class variants The ''Type-A'' submarines were divided into four classes: * * * * . The ''5094th vessel'' class boats were not built and remained only a design. ''Type-A'' (''I-9'' class) Project number S35Ja. Their design was based on the ''Junsen III'' (''I-7'' class). Three boats were built in 1938-42 under the Maru 3 Programme (Boat # 35 - 36) and Maru 4 Programme (Boat # 138). *Boats in class ''Type-A Mod.1'' (''I-12'' class) Project number S35B. Five boats were planned under the Maru Tsui Programme (Boat # 620 - 621) and the Kai-Maru 5 Programme (Boat # 5091 - 5093). They were equipped with less powerful diesel engines which shortened the time needed to build t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kure Naval Arsenal
was one of four principal naval shipyards owned and operated by the Imperial Japanese Navy. History The Kure Naval District was established at Kure, Hiroshima in 1889, as the second of the naval districts responsible for the defense of the Japanese home islands. Along with the establishment of the navy base, a ship repair facility was also constructed, initially by moving the equipment from the Onohama shipyards near Kobe. Construction was supervised by the French engineer Louis-Émile Bertin. The first warship constructed at Kure, '' Miyako'', was launched in 1897. The "Kure Shipyards" were officially renamed the "Kure Naval Arsenal" in 1903. Kure developed into one of the largest shipbuilding facilities in the Empire of Japan, capable of working with the largest vessels. The Arsenal included a major steel works (built with British assistance), and also facilities for producing naval artillery and projectiles. The battleships ''Yamato'' and '' Nagato'' were designed and con ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Additional Naval Armaments Supplement Programme (Japan, 1941)
The was one of the naval expansion plans of the Imperial Japanese Navy (IJN). Background In November 1941, the IJN required many additional submarines for the Pacific War, as a pressing matter. To meet this need, the IJN negotiated with the Ministry of Finance and received approval for 32 submarines and one target ship. Later, they were concluded by 78th, 79th and 81st Imperial Diet. Table of vessels See also * 1st Naval Armaments Supplement Programme (Maru 1 Keikaku, 1931) * 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) * 5th Naval Armaments Supplement Programme (Maru 5 Keikaku, 1941) *6th Naval Armaments Supplement Programme 6 (six) is the natural number following 5 and preceding 7. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Watanabe E9W
The Watanabe E9W was a Japanese submarine-borne reconnaissance seaplane, the first aircraft designed by Watanabe Ironworks. Development and design In January 1934, the Imperial Japanese Navy had a requirement for a two-seat reconnaissance seaplane to be operated from its J-3 type submarines, and placed an order with Watanabe for design and development of an aircraft to meet this requirement, the first of three prototypes flying in February 1935.Mikesh and Abe 1990, p.259. The E9W was a two-seat single-engine twin-float unequal-span seaplane designed to be easily dismantled for hangar stowage on a submarine, capable of being reassembled in two minutes 30 seconds and disassembled in one minute 30 seconds. It was armed with a 7.7 mm (0.303 in) machine gun operated by the observer. Following successful testing of one of the prototypes on the submarine ''I-5'', an order for a production batch of 32 aircraft, designated E9W1, was placed.Green 1962, p.137. Operational h ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
14 Cm/40 11th Year Type Naval Gun
The 14 cm/40 11th Year Type naval gun was the standard surface battery for Japanese submarine cruisers of World War II. Most carried single guns, but Junsen type submarines carried two. Japanese submarines ''I-7'' and ''I-8'' carried an unusual twin mounting capable of elevating to 40°. The appended designation ''11th year type'' refers to the horizontal sliding breech block on these guns. Breech block design began in 1922, or the eleventh year of the Taishō period in the Japanese calendar. The gun fired a projectile in diameter, and the barrel was 40 calibers long (barrel length is 14 cm x 40 = 560 centimeters or 220 inches). World War II This gun was the weapon used by ''I-17'' to sink ''SS Emidio'' and to later shell the Ellwood Oil Field near Santa Barbara, California. It was also used by ''I-25'' for the Bombardment of Fort Stevens in Oregon near the mouth of the Columbia River and by ''I-26'' to shell the Estevan Point lighthouse in British Columbia ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Caliber
In guns, particularly firearms, caliber (or calibre; sometimes abbreviated as "cal") is the specified nominal internal diameter of the gun barrel Gauge (firearms) , bore – regardless of how or where the bore is measured and whether the finished bore matches that specification. It is measured in inches or in millimetres, millimeters. In the United States it is expressed in hundredths of an inch; in the United Kingdom in thousandths; and elsewhere in millimeters. For example, a "45 caliber" firearm has a barrel diameter of roughly . Barrel diameters can also be expressed using metric dimensions. For example, a "9 mm pistol" has a barrel diameter of about 9 millimeters. Since metric and US customary units do not convert evenly at this scale, metric conversions of caliber measured in decimal inches are typically approximations of the precise specifications in non-metric units, and vice versa. In a rifling , rifled barrel, the distance is measured between opposing Rifling#C ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Type 95 Torpedo
The Type 95 torpedo was a torpedo used by submarines of the Imperial Japanese Navy during World War II. The Type 95 was based on the Type 93 torpedo ( ''Long Lance''); its mod 1 had a smaller and mod 2 had a larger warhead size than the Type 93's . The Type 95 was similar to the U.S. Navy's contemporary Mark 16 hydrogen peroxide torpedo, which had a shorter range, slightly higher top speed and a larger and nearly twice as powerful war head at 580 Kilograms filled with TORPEX. It was intended to be fired from a standard torpedo tube of a submerged submarine. Range of the Type 95 was (for the mod 1) at , or at , which was about three times the range of the U.S. Navy Mark 14 at the same speed when using longer range and 45 to 47 knots. The Type 95 was the fastest torpedo in common use by any navy during World War II. Its warhead size was the largest of any submarine torpedo, and second only to the Type 93 used by Japanese surface ships. Its engine was a kerosene-oxygen wet-h ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Torpedo Tube
A torpedo tube is a cylindrical device for launching torpedoes. There are two main types of torpedo tube: underwater tubes fitted to submarines and some surface ships, and deck-mounted units (also referred to as torpedo launchers) installed aboard surface vessels. Deck-mounted torpedo launchers are usually designed for a specific type of torpedo, while submarine torpedo tubes are general-purpose launchers, and are often also capable of deploying naval mine, mines and cruise missiles. Most modern launchers are standardized on a diameter for light torpedoes (deck mounted aboard ship) or a diameter for heavy torpedoes (underwater tubes), although other sizes of torpedo tube have been used: see Torpedo#Classes and diameters, Torpedo classes and diameters. Submarine torpedo tube A submarine torpedo tube is a more complex mechanism than a torpedo tube on a surface ship, because the tube has to accomplish the function of moving the torpedo from the normal atmospheric pressure within t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Imperial Japanese Navy Technical Department
The was the externally operating division of the Ministry of the Navy of Japan responsible for the administration of naval vessel construction. From 1923 onward, it took on the role of a research institution for the research and development of naval technologies and engineering. This included studying and investigating existing western naval technology, developing and overseeing Japan's domestic shipbuilding and arms industries, and training officers to become naval engineers and inspectors. The bureau was dismantled along with the naval ministry in November 1945 after Japan surrendered to the Allies at the end of World War II. Taishō period weapons The Department developed various weapons during the Taishō period. These were known a "Xth Year Type" weapons, with the year being the year of the Taishō Emperor's reign (dating from 30 July 1912 - 25 December 1926). [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hawaiian Islands
The Hawaiian Islands ( haw, Nā Mokupuni o Hawai‘i) are an archipelago of eight major islands, several atolls, and numerous smaller islets in the North Pacific Ocean, extending some from the island of Hawaii in the south to northernmost Kure Atoll. Formerly the group was known to Europeans and Americans as the Sandwich Islands, a name that James Cook chose in honor of the 4th Earl of Sandwich, the then First Lord of the Admiralty. Cook came across the islands by chance when crossing the Pacific Ocean on his Third Voyage in 1778, on board HMS ''Resolution''; he was later killed on the islands on a return visit. The contemporary name of the islands, dating from the 1840s, is derived from the name of the largest island, Hawaii Island. Hawaii sits on the Pacific Plate and is the only U.S. state that is not geographically connected to North America. It is part of the Polynesia subregion of Oceania. The state of Hawaii occupies the archipelago almost in its entirety (includin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bonin Islands
The Bonin Islands, also known as the , are an archipelago of over 30 subtropical and tropical islands, some directly south of Tokyo, Japan and northwest of Guam. The name "Bonin Islands" comes from the Japanese word ''bunin'' (an archaic reading of ''mujin''), meaning "no people" or "uninhabited". The only inhabited islands of the group are Chichijima (), the seat of the municipal government, and Hahajima (). Archeological evidence has revealed that some of the islands may have been prehistorically inhabited by members of an unknown Micronesian ethnicity. Ogasawara Municipality (''mura'') and Ogasawara Subprefecture take their names from the Ogasawara Group. The is also used as a wider collective term that includes other islands in Ogasawara Municipality, such as the Volcano Islands, along with three other remote islands ( Nishinoshima, Minamitorishima, and Okinotorishima). Geographically speaking, all of these islands are parts of the Nanpō Islands. A total population of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aichi M6A
The is a submarine-launched attack floatplane designed for the Imperial Japanese Navy during World War II. It was intended to operate from I-400 class submarines whose original mission was to conduct aerial attacks against the United States. Design and development From the late 1920s, the Imperial Japanese Navy had developed a doctrine of operating floatplanes from submarines to search for targets.Layman and McLaughlin 1991, p. 176. In December 1941, Commander-in-Chief of the Japanese Combined Fleet, Admiral Isoroku Yamamoto, proposed constructing a large fleet of submarine aircraft carriers (also designated STo or ''sen-toku'' — special submarine) whose purpose was to mount aerial attacks against American coastal cities. The submarines would surface to launch their aircraft by catapult, submerge to avoid detection, then surface again to retrieve the aircrews who would ditch their planes nearby. By June 1942, the plan was to build a fleet of eighteen such submarines. This wa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
