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Sōryū-class Submarine
The ''Sōryū''-class submarines (''16SS'') are diesel-electric attack submarines. The first boat in the class entered service with the Japan Maritime Self-Defense Force in 2009. The design is an evolution of the , from which it can most easily be distinguished by its X-shaped stern combination diving planes and rudders. The ''Sōryūs'' have the largest displacement of any submarine used by post-war Japan. It is Japan's first air-independent propulsion submarine. From ''Sōryū'' to ''Shōryū'' are fitted with Kockums Naval Solutions Stirling engines license-built by Kawasaki Heavy Industries, allowing them to stay submerged for longer periods of time. Furthermore, ''Ōryū'' is the world's first lithium-ion battery submarine. The cost of the sixth submarine (''Kokuryū'') was estimated at 540 million USD. In 2019, the replacement to the ''Sōryū''s, the Taigei-class submarine, entered the planning phase. Naming convention Japanese submarines since World War II were named af ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mitsubishi Heavy Industries
is a Japanese multinational engineering, electrical equipment and electronics corporation headquartered in Tokyo, Japan. MHI is one of the core companies of the Mitsubishi Group and its automobile division is the predecessor of Mitsubishi Motors. MHI's products include aerospace and automotive components, air conditioners, elevators, forklift trucks, hydraulic equipment, printing machines, missiles, tanks, power systems, ships, aircraft, railway systems, and space launch vehicles. Through its defense-related activities, it is the world's 23rd-largest defense contractor measured by 2011 defense revenues and the largest based in Japan. History In 1857, at the request of the Tokugawa Shogunate, a group of Dutch engineers were invited, including Dutch naval engineer Hendrik Hardes, and began work on the ''Nagasaki Yotetsusho'' 長崎鎔鉄所 , a modern, Western-style foundry and shipyard near the Dutch settlement of Dejima, at Nagasaki. This was renamed ''Naga ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Air-independent Propulsion
Air-independent propulsion (AIP), or air-independent power, is any marine propulsion technology that allows a non-nuclear submarine to operate without access to atmospheric oxygen (by surfacing or using a snorkel). AIP can augment or replace the diesel-electric propulsion system of non-nuclear vessels. Modern non-nuclear submarines are potentially stealthier than nuclear submarines; although some modern submarine reactors are designed to rely on natural circulation, most naval nuclear reactors use pumps to constantly circulate the reactor coolant, generating some amount of detectable noise. Non-nuclear submarines running on battery power or AIP, on the other hand, can be virtually silent. While nuclear-powered designs still dominate in submergence times, speed, range and deep-ocean performance; small, high-tech non-nuclear attack submarines can be highly effective in coastal operations and pose a significant threat to less-stealthy and less-maneuverable nuclear submarines. AIP ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Prime Minister Of Australia
The prime minister of Australia is the head of government of the Commonwealth of Australia. The prime minister heads the executive branch of the Australian Government, federal government of Australia and is also accountable to Parliament of Australia, federal parliament under the principles of responsible government. The current prime minister is Anthony Albanese of the Australian Labor Party, who became prime minister on 23 May 2022. Formally appointed by the Governor-General of Australia, governor-general, the role and duties of the prime minister are not described by the Constitution of Australia, Australian constitution but rather defined by Constitutional convention (political custom), constitutional convention deriving from the Westminster system. To become prime minister, a politician should be able to Confidence and supply, command the confidence of the House of Representatives (Australia), House of Representatives. As such, the prime minister is typically the leader o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
David Johnston (Australian Politician)
David Albert Lloyd Johnston (born 14 February 1956) is an Australian politician who was a Liberal Party member of the Australian Senate from 2002 to 2016, representing the state of Western Australia. Johnston was the Minister for Defence from 18 September 2013 to 23 December 2014, when he was replaced by Kevin Andrews. Background and career Johnston was born in Perth and was educated at University of Western Australia, where he graduated in law. He was a barrister in Kalgoorlie before entering politics, representing companies such as Gold Mines of Kalgoorlie LTD and North Kalgurli Mines LTD. He unsuccessfully contested the House of Representatives at the 1987 federal election, polling 37.3% of first preferences to finish second behind the then Labor incumbent Graeme Campbell in the Division of Kalgoorlie. Johnston successfully stood for a WA Senate seat in the federal election on 10 November 2001. He assumed office on 1 July 2002 and on 6 March 2007 was made Minister for ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Minister For Defence (Australia)
The Minister for Defence is the principal minister responsible for the organisation, implementation, and formulation of government policy in defence and military matters for the Australian Government. The individual who holds this office directs the government’s approach to such matters through the Australian Defence Organisation and, by extension, the Department of Defence and the Australian Defence Force. The office of the Minister for Defence, like all Cabinet positions, is not referenced in the Constitution of Australia but rather exists through convention and the prerogative of the Governor-General to appoint ministers of state. As the Minister for Defence is responsible for the executive management of Australia's defence and military forces and the portfolio's accountability to the Parliament, the Secretary of Defence is required under section 63(1) of the ''Public Service Act 1999'' and the ''Requirements for Annual Reports'' from the Parliamentary Joint Committee on ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Royal Australian Navy
The Royal Australian Navy (RAN) is the principal naval force of the Australian Defence Force (ADF). The professional head of the RAN is Chief of Navy (CN) Vice Admiral Mark Hammond AM, RAN. CN is also jointly responsible to the Minister of Defence (MINDEF) and the Chief of Defence Force (CDF). The Department of Defence as part of the Australian Public Service administers the ADF. Formed in 1901, as the Commonwealth Naval Forces (CNF), through the amalgamation of the colonial navies of Australia following the federation of Australia. Although it was originally intended for local defence, it became increasingly responsible for regional defence as the British Empire started to diminish its influence in the South Pacific. The Royal Australian Navy was initially a green-water navy, and where the Royal Navy provided a blue-water force to the Australian Squadron, which the Australian and New Zealand governments helped to fund, and that was assigned to the Australia Station. Thi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lithium-ion Batteries
A lithium-ion or Li-ion battery is a type of rechargeable battery which uses the reversible reduction of lithium ions to store energy. It is the predominant battery type used in portable consumer electronics and electric vehicles. It also sees significant use for grid-scale energy storage and military and aerospace applications. Compared to other rechargeable battery technologies, Li-ion batteries have high energy densities, low self-discharge, and no memory effect (although a small memory effect reported in LFP cells has been traced to poorly made cells). Chemistry, performance, cost and safety characteristics vary across types of lithium-ion batteries. Most commercial Li-ion cells use intercalation compounds as the active materials. The anode or negative electrode is usually graphite, although silicon-carbon is also being increasingly used. Cells can be manufactured to prioritize either energy or power density. Handheld electronics mostly use lithium polymer batteries ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Battle Of Midway
The Battle of Midway was a major naval battle in the Pacific Theater of World War II that took place on 4–7 June 1942, six months after Japan's attack on Pearl Harbor and one month after the Battle of the Coral Sea. The U.S. Navy under Admirals Chester W. Nimitz, Frank J. Fletcher, and Raymond A. Spruance defeated an attacking fleet of the Imperial Japanese Navy under Admirals Isoroku Yamamoto, Chūichi Nagumo, and Nobutake Kondō north of Midway Atoll, inflicting devastating damage on the Japanese fleet. Military historian John Keegan called it "the most stunning and decisive blow in the history of naval warfare", while naval historian Craig Symonds called it "one of the most consequential naval engagements in world history, ranking alongside Salamis, Trafalgar, and Tsushima Strait, as both tactically decisive and strategically influential". Hoping to lure the American aircraft carriers into a trap and occupying Midway was part of an overall "barrier" strategy to extend ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Japanese Ship-naming Conventions
Japanese ship names follow different conventions from those typical in the West. Merchant ship names often contain the word ''maru'' at the end (meaning ''circle''), while warships are never named after people, but rather after objects such as mountains, islands, weather phenomena, or animals. Merchant ships The word is often attached to Japanese ship names. The first ship known to follow this practice was the ''Nippon Maru'', flagship of ''daimyō'' Toyotomi Hideyoshi's 16th century fleet. Several theories purport to explain this practice: *The most common is that ships were thought of as floating castles, and the word referred to the defensive "circles" or ''maru'' that protected the castle. *The suffix ''-maru'' is often applied to words representing something beloved, and sailors applied this suffix to their ships. *The term ''maru'' is used in divination and represents perfection or completeness, or the ship as "a small world of its own". *The myth of '' Hakudo Maru'', ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ocean Currents
An ocean current is a continuous, directed movement of sea water generated by a number of forces acting upon the water, including wind, the Coriolis effect, breaking waves, cabbeling, and temperature and salinity differences. Depth contours, shoreline configurations, and interactions with other currents influence a current's direction and strength. Ocean currents are primarily horizontal water movements. An ocean current flows for great distances and together they create the global conveyor belt, which plays a dominant role in determining the climate of many of Earth’s regions. More specifically, ocean currents influence the temperature of the regions through which they travel. For example, warm currents traveling along more temperate coasts increase the temperature of the area by warming the sea breezes that blow over them. Perhaps the most striking example is the Gulf Stream, which makes northwest Europe much more temperate for its high latitude compared to other areas at ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Taigei-class Submarine
The ''Taigei''-class submarines (''29SS'') is a new class of attack submarines after 2022, developed for the Japan Maritime Self-Defense Force. It is the successor to the . The ''Taigei'' class is equipped with a large amount of lithium-ion batteries, as is the case with the eleventh and twelfth submarines of the ''Sōryū'' class ( and ), making it possible for the submersible to travel longer and at higher speeds under water than conventional diesel-electric submarines. Development The development of the ''Taigei'' class was conducted from a variety of researches aimed at developing new and improved submarine components to improve the capabilities of "next-generation submarines" that will operate in the 2020s and beyond. Early studies (2004) In 2004, an evaluation was made on researching next-generation submarine systems based on capability requirements: dive speed, stealth, etc. The research involved utilizing simulation technologies to optimize the most efficient design f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
