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Type 639 Oceanographic Surveillance Ship
Type 639 is a type of ocean surveillance ship is a type of oceanographic surveillance ship developed by China for its People's Liberation Army Navy (PLAN) to replace earlier Type 595. A single unit of Type 639 with pennant number Bei-diao 992 is currently in service as an oceanographic research ship and five more modified version serving as hydrographic survey ships are designated as Type 639A. Type 639 has received NATO reporting name ''Kanhai'' class, 勘海 in Chinese, meaning Surveying Sea. Type 639 is a SWATH design of 1500 tons of displacement with three anchors. In addition to the SWATH hull form, another unique feature of Type 639 oceanographic research ship is the adaptation of integrated electric propulsion system. Developed by China Shipbuilding Industry Corporation (CSIC), the subsystems are developed by various subsidiaries and divisions of CSIC. The ship is jointly developed by 701st (中国船舶重工集团公司第七零一研究所) anThe 702nd Institute of CSIC ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Marine Propulsion
Marine propulsion is the mechanism or system used to generate thrust to move a watercraft through water. While paddles and sails are still used on some smaller boats, most modern ships are propelled by mechanical systems consisting of an electric motor or internal combustion engine driving a propeller, or less frequently, in pump-jets, an impeller. Marine engineering is the discipline concerned with the engineering design process of marine propulsion systems. Human-powered paddles and oars, and later, sails were the first forms of marine propulsion. Rowed galleys, some equipped with sail, played an important early role in early human seafaring and warfares. The first advanced mechanical means of marine propulsion was the marine steam engine, introduced in the early 19th century. During the 20th century it was replaced by two-stroke or four-stroke diesel engines, outboard motors, and gas turbine engines on faster ships. Marine nuclear reactors, which appeared in the 1950s, pro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ocean Surveillance Ship
''Stalwart''-class auxiliary general ocean surveillance ships ( T-AGOS) were a class of United States Naval Ship (USNS) auxiliary support Ocean Surveillance Ships commissioned between April 1984 and January 1990. Their original purpose was to collect underwater acoustical information using the Surveillance Towed Array Sensor System The AN/UQQ-2 Surveillance Towed Array Sensor System (SURTASS), colloquially referred to as the ship's "Tail", is a towed array sonar system of the United States Navy. SURTASS Twin-Line consists of either the long passive SURTASS array or the Twi ... (SURTASS), a towed array passive sonar. ''Stalwart'', ''Indomitable'', and ''Capable'' were modified to support narcotics interdiction by removing SURTASS equipment and adding an air-search radar and tactical data link equipment. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
People's Liberation Army Navy
The People's Liberation Army Navy (PLAN; ), also known as the People's Navy, Chinese Navy, or PLA Navy, is the maritime service branch of the People's Liberation Army. The PLAN traces its lineage to naval units fighting during the Chinese Civil War and was established on 23 April 1949. Throughout the 1950s and early 1960s, the Soviet Union provided assistance to the PLAN in the form of naval advisers and export of equipment and technology. Until the late 1980s, the PLAN was largely a riverine and littoral force (brown-water navy). In the 1990s, following the fall of the Soviet Union and a shift towards a more forward-oriented foreign and security policy, the leaders of the Chinese military were freed from worrying overland border disputes. Traditionally subordinated to the PLA Ground Force, PLAN leaders were now able to advocate for a renewed attention towards the seas. Chinese military officials have outlined plans to operate in the first and second island chains, and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Type 595 Ocean Surveillance Ship
Type 595 ocean surveillance ship is the first purposely designed and purposely built ocean surveillance ship developed in China for its People's Liberation Army Navy (PLAN). Designed to replace earlier Shuguang class, Type 595 itself has been replaced by Type 639 in PLAN, but despite over four decades of service, this type of ship still remain active in civilian service, albeit on a much smaller scale. The design of Type 595 mid-sized ocean surveillance ship was completed in May 1965 by the 708th Institute of China State Shipbuilding Corporation, which is also more commonly known aChina Shipbuilding and Oceanic Engineering Design Academy (中国船舶及海洋工程设计研究) nowadays. Original plan was to have construction of this type of ship immediately follows the completion of design, but due to political turmoil in China, namely, Cultural Revolution, construction was delayed and it was not until nearly one and half a year later in September 1967, when construction of the f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oceanographic Research Ship
Oceanography (), also known as oceanology and ocean science, is the scientific study of the oceans. It is an Earth science, which covers a wide range of topics, including ecosystem dynamics; ocean currents, waves, and geophysical fluid dynamics; plate tectonics and the geology of the sea floor; and fluxes of various chemical substances and physical properties within the ocean and across its boundaries. These diverse topics reflect multiple disciplines that oceanographers utilize to glean further knowledge of the world ocean, including astronomy, biology, chemistry, climatology, geography, geology, hydrology, meteorology and physics. Paleoceanography studies the history of the oceans in the geologic past. An oceanographer is a person who studies many matters concerned with oceans, including marine geology, physics, chemistry and biology. History Early history Humans first acquired knowledge of the waves and currents of the seas and oceans in pre-historic times. Observations on ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Survey Ship
A survey vessel is any type of ship or boat that is used for underwater surveys, usually to collect data for mapping or planning underwater construction or mineral extraction. It is a type of research vessel, and may be designed for the purpose, modified for the purpose or temporarily put into the service as a vessel of opportunity, and may be crewed, remotely operated, or autonomous. The size and equipment vary to suit the task and availability. Role The task of survey vessels is to map the bottom, and measure the characteristics of the benthic zone, full water column, and surface for the purpose of: * hydrography, the measurement and description of the physical features of oceans and other natural bodies of water, and the prediction of their change over time, for the primary purpose of safety of navigation and in support of other activities associated with those bodies of water, * general oceanography, the scientific study of the oceans, * mapping of marine habitats as part ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
NATO Reporting Name
NATO reporting names are code names for military equipment from Russia, China, and historically, the Eastern Bloc (Soviet Union and other nations of the Warsaw Pact). They provide unambiguous and easily understood English words in a uniform manner in place of the original designations, which either may have been unknown to the Western world at the time or easily confused codes. For example, the Russian bomber jet Tupolev Tu-160 is simply called "Blackjack". NATO maintains lists of the names. The assignment of the names for the Russian and Chinese aircraft was once managed by the five-nation Air Standardization Coordinating Committee (ASCC), but that is no longer the case. American variations The United States Department of Defense (DOD) expands on the NATO reporting names in some cases. NATO refers to surface-to-air missile systems mounted on ships or submarines with the same names as the corresponding land-based systems, but the US DoD assigns a different series of numbers with ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
SWATH
A small waterplane area twin hull, better known by the acronym SWATH, is a catamaran design that minimizes hull cross section area at the sea's surface. Minimizing the ship's volume near the surface area of the sea, where wave energy is located, minimizes a vessel's response to sea state, even in high seas and at high speeds. The bulk of the displacement necessary to keep the ship afloat is located beneath the waves, where it is less affected by wave action. Wave excitation drops exponentially as depth increases, so wave action normally does not affect a submerged submarine at all. Placing the majority of a ship's displacement under the waves is similar in concept to creating a ship that rides atop twin submarines. Effects The twin-hull design provides a stable platform and large, broad decks. Compared with conventional catamarans, SWATH vessels have more surface drag, but less wave drag. They are less susceptible to wave motion but more sensitive to payload, which affect ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Integrated Electric Propulsion
Integrated electric propulsion (IEP) or full electric propulsion (FEP) or integrated full electric propulsion (IFEP) is an arrangement of marine propulsion systems such that gas turbines or diesel generators or both generate three-phase electricity which is then used to power electric motors turning either s or waterjet impellors. It is a modification of the |
China Shipbuilding Industry Corporation
The China Shipbuilding Industry Corporation (CSIC) was one of the two largest shipbuilding conglomerates in China, the other was the China State Shipbuilding Corporation (CSSC). It was formed by the Government of the People's Republic of China on 1 July 1999 from companies spun off from CSSC, and is 100% owned by State-owned Assets Supervision and Administration Commission (SASAC) of State Council. Headquartered in Beijing, the CSIC handles shipbuilding activities in the north and the west of China, while the China State Shipbuilding Corporation (CSSC) deals with those in the east and the south of the country. CSIC's subsidiary, China Shipbuilding Industry Company Limited (CSICL), was listed on the Shanghai Stock Exchange in 2008. Its trade arm is China Shipbuilding & Offshore International Co. Ltd (CSOC). CSIC has developed 10 main product sections: shipbuilding, marine engineering, diesel engines, storage batteries, large steel structure fabrications, port machinery, turb ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
East Sea Fleet
The Eastern Theater Command Navy (), or East Sea Fleet (ESF; ), is one of the three fleets of the People's Liberation Army Navy, operating in the East China Sea under the Eastern Theater Command. It was the first naval force formed by the People's Liberation Army, on 23 April 1949 and was initially based at Shanghai. Renamed in 1955, it has since been assigned to be part of the People's Liberation Army Navy and its headquarters have been moved to Ningbo, Zhejiang Province, but the fleet continues to patrol the East China Sea. Its flagship is the Type 052C destroyer ''Changchun''. The fleet was used in a support role during the People's Liberation Army's (PLA) invasion of the Kuomintang-held island of Yijiangshan on 14 January 1955. It has engaged in numerous other battles against the Republic of China Armed Forces. It has also operated in support of the South Sea Fleet against the People's Army of Vietnam during the 1980s. Major naval bases of the fleet * Ningbo Fleet Headqua ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
North Sea Fleet
The Northern Theater Command Navy (), or the North Sea Fleet (NSF; ) is one of the three fleets of the Chinese People's Liberation Army Navy, under the Northern Theater Command. In September 1950 the Qingdao Army Base was redesignated as a naval base. Following the departure of the Soviet Navy from Lüshunkou (Port Arthur), the North Sea Fleet was established in 1960 with naval bases in Qingdao and Lüshunkou. It includes the Aircraft carrier Liaoning, as well as nuclear-powered attack and missile submarines based at Qingdao bastion. The North Sea Fleet was historically the most capable of the Navy's three fleets, being the first in China to operate destroyers, shore-based missiles and nuclear submarines. In recent years however, the shift in strengthening of importance and strategic capabilities of the East and South Sea Fleets are more prioritised. See also * People's Liberation Army Navy ** East Sea Fleet ** South Sea Fleet * Beiyang Fleet The Beiyang Fleet (Pei-y ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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