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Alta Class Minesweeper
The ''Alta'' class is a ship class of minesweepers operated by the Royal Norwegian Navy. An almost identical class of minehunters is known as the . Design The ''Alta'' class was built by Kværner Mandal during 1996 and 1997, while the related ''Oksøy'' class was built in 1994 and 1995. A total of 9 vessels were built, 5 minesweepers and 4 minehunters. The catamaran hull is built in a fibre-reinforced plastic sandwich of very low magnetic signature. Two large fans located on each side create an air cushion between the two hulls and a front and aft rubber skirt, lifting the vessel, giving small drag and a high cruise speed, as well as low susceptibility to the shock of exploding mines since only a small portion of the hull is actually exposed in the water. Propulsion by water jet Water jet may refer to: * A jet of water under pressure, like in an ornamental fountain * Pump-jet, a marine propulsion mechanism for jetskis and other types of boats * Water jet cutter, a tool for cu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kværner Mandal
Umoe Mandal AS is a shipbuilding company in the Ulltveit-Moe Group. Their shipyards are based at Mandal in Norway. Founded in 1989 as Kværner Båtservice, later Kværner Mandal, and known as Umoe Mandal since 2000, the company specialises in high-speed naval vessels, mine countermeasure vessels (MCMVs) and fast patrol boats (FPBs). They supply the Royal Norwegian Navy, for whom they are currently in production with the Fast Attack Craft series ''Skjold''. The company is especially known for its expertise in the use of fibre reinforced plastic (FRP) technology in naval applications and undertakes the design of naval and commercial vessels in FRP and other advanced composites structures for military applications, as well as shock design, stealth design, and EMI/EMC measures and weight/strength optimisation. The company also produces a range of special products in its market area, such radar stealth air intakes, carbon fibre composite centrifugal fans and, through its subsidiary ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Minesweeper (ship)
A minesweeper is a small warship designed to remove or detonate naval mines. Using various mechanisms intended to counter the threat posed by naval mines, minesweepers keep waterways clear for safe shipping. History The earliest known usage of the naval mine dates to the Ming dynasty.Needham, Volume 5, Part 7, 203–205. Dedicated minesweepers, however, only appeared many centuries later during the Crimean War, where they were deployed by the British. The Crimean War minesweepers were rowboats trailing grapnels to snag mines. Minesweeping technology picked up in the Russo-Japanese War, using aging torpedo boats as minesweepers. In Britain, naval leaders recognized before the outbreak of World War I that the development of sea mines was a threat to the nation's shipping and began efforts to counter the threat. Sir Arthur Wilson noted the real threat of the time was blockade aided by mines and not invasion. The function of the fishing fleet's trawlers with their trawl gear was ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mine Warfare Vessel Classes
Mine, mines, miners or mining may refer to: Extraction or digging *Miner, a person engaged in mining or digging *Mining, extraction of mineral resources from the ground through a mine Grammar *Mine, a first-person English possessive pronoun Military * Anti-tank mine, a land mine made for use against armored vehicles * Antipersonnel mine, a land mine targeting people walking around, either with explosives or poison gas * Bangalore mine, colloquial name for the Bangalore torpedo, a man-portable explosive device for clearing a path through wire obstacles and land mines * Cluster bomb, an aerial bomb which releases many small submunitions, which often act as mines * Land mine, explosive mines placed under or on the ground * Mining (military), digging under a fortified military position to penetrate its defenses * Naval mine, or sea mine, a mine at sea, either floating or on the sea bed, often dropped via parachute from aircraft, or otherwise lain by surface ships or submarines * ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bergensavisen
''Bergensavisen'' (lit. "the Bergen newspaper"), usually shortened to ''BA'', is the second largest newspaper in Bergen, Norway. The paper is published in tabloid format. The newspaper's webpage ba.no is Bergen's largest local newspaper webpage. In 2006, ''Bergensavisen'' had a daily circulation of 30,719 on Monday to Saturday, and 29,782 on Sundays. Approximately 108,000 read the paper every day. Pre-history ''Bergensavisen'' had a predecessor in Arbeidervennen, founded by the Danish trade unionist Sophus Pihl in 1885. When he died in 1888, a group of trade unionists and idealists continued his work. The newspaper '' Arbeidet'', started as a daily in December 1893. They sold their newspaper to Bergens Arbeiderparti, the local affiliation of the Norwegian Labour Party in 1905. However, the Labour Party went through two party splits in the 1920s. As the Labour Party joined Comintern in 1919, a group broke away in 1921 to form the Social Democratic Labour Party. This group found ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Glass-reinforced Plastic
Fiberglass (American English) or fibreglass (Commonwealth English) is a common type of fiber-reinforced plastic using glass fiber. The fibers may be randomly arranged, flattened into a sheet called a chopped strand mat, or woven into glass cloth. The plastic matrix may be a thermoset polymer matrix—most often based on thermosetting polymers such as epoxy, polyester resin, or vinyl ester resin—or a thermoplastic. Cheaper and more flexible than carbon fiber, it is stronger than many metals by weight, non-magnetic, non-conductive, transparent to electromagnetic radiation, can be molded into complex shapes, and is chemically inert under many circumstances. Applications include aircraft, boats, automobiles, bath tubs and enclosures, swimming pools, hot tubs, septic tanks, water tanks, roofing, pipes, cladding, orthopedic casts, surfboards, and external door skins. Other common names for fiberglass are glass-reinforced plastic (GRP), glass-fiber reinforced plastic (GFRP) or GFK ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Catamaran
A Formula 16 beachable catamaran Powered catamaran passenger ferry at Salem, Massachusetts, United States A catamaran () (informally, a "cat") is a multi-hulled watercraft featuring two parallel hulls of equal size. It is a geometry-stabilized craft, deriving its stability from its wide beam, rather than from a ballasted keel as with a monohull boat. Catamarans typically have less hull volume, smaller displacement, and shallower draft (draught) than monohulls of comparable length. The two hulls combined also often have a smaller hydrodynamic resistance than comparable monohulls, requiring less propulsive power from either sails or motors. The catamaran's wider stance on the water can reduce both heeling and wave-induced motion, as compared with a monohull, and can give reduced wakes. Catamarans were invented by the Austronesian peoples which enabled their expansion to the islands of the Indian and Pacific Oceans. Catamarans range in size from small sailing or ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kværner
Kværner was a Norwegian engineering and construction services company that existed between 1853 and 2005. In 2004, it was amalgamated to the newly formed subsidiary of Aker ASA - Aker Kværner, which was renamed Aker Solutions on 3 April 2008. Kværner re-emerged on 6 May 2011, when the EPC (engineering, procurement and construction) part of Aker Solutions took the Kværner name. The new Kværner company was listed on the Oslo Stock Exchange on 8 July 2011. History Kvaerner Brug was founded in Oslo in 1853 by industrialist Oluf A. Onsum (1820-1899). The company became principally involved in the production of cast iron stoves. In 1870, Kvaerner built its first hydroelectric turbine. During the early 1900s, Kvaerner power turbines remained the principal product line which also included bridges, cranes, and pumps. Kvaerner was listed on the Oslo Stock Exchange in 1967. By the 1990s, the company assembled a collection of engineering and industrial businesses, including shipb ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Minehunters
A minehunter is a naval vessel that seeks, detects, and destroys individual naval mines. Minesweepers, on the other hand, clear mined areas as a whole, without prior detection of mines. A vessel that combines both of these roles is known as a mine countermeasures vessel (MCMV). Description A minehunter uses an imaging sonar to detect and classify targets and then sends out divers or remotely operated vehicles to inspect and neutralise the threat, often using small charges that are detonated remotely. As minehunters will often be operating in close proximity to mines, they are designed so as to reduce their own acoustic and magnetic signatures, two common forms of trigger for mines. For example, they are often soundproofed by mounting machinery on shock absorbers or by using quiet electrical drive, low magnetic electric motors and usually have a wood, fiberglass or non-ferrous metal hull, or are degaussed to reduce magnetic signature.Design Guide and Requirements for Equ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Royal Norwegian Navy
The Royal Norwegian Navy ( no, Sjøforsvaret, , Sea defence) is the branch of the Norwegian Armed Forces responsible for naval operations of Norway. , the Royal Norwegian Navy consists of approximately 3,700 personnel (9,450 in mobilized state, 32,000 when fully mobilized) and 70 vessels, including 4 heavy frigates, 6 submarines, 14 patrol boats, 4 minesweepers, 4 minehunters, 1 mine detection vessel, 4 support vessels and 2 training vessels. It also includes the Coast Guard. This navy has a history dating back to 955. From 1509 to 1814, it formed part of the navy of Denmark-Norway, also referred to as the "Common Fleet". Since 1814, the Royal Norwegian Navy has again existed as a separate navy. In Norwegian, all its naval vessels since 1946 bear ship prefix "KNM", Kongelig Norske Marine (which accurately translates to Royal Norwegian Navy/Naval vessel). In English, they are permitted still to be ascribed prefix "HNoMS", meaning "His/Her Norwegian Majesty's Ship" ("HNMS" ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ship Class
A ship class is a group of ships of a similar design. This is distinct from a ship type, which might reflect a similarity of tonnage or intended use. For example, is a nuclear aircraft carrier (ship type) of the (ship class). In the course of building a class of ships, design changes might be implemented. In such a case, the ships of different design might not be considered of the same class; each variation would either be its own class, or a subclass of the original class (see for an example). If ships are built of a class whose production had been discontinued, a similar distinction might be made. Ships in a class often have names linked by a common factor: e.g. s' names all begin with T (, , ); and s are named after American battles (, , , ). Ships of the same class may be referred to as sister ships. Naval ship class naming conventions Overview The name of a naval ship class is most commonly the name of the lead ship, the first ship commissioned or built of its design ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mandal, Norway
Mandal is a town in Lindesnes municipality in Agder county, Norway. Mandal is the fourth largest town in Agder as well as the administrative centre of Lindesnes municipality. It is located at the mouth of the river Mandalselva at the southern end of the Mandalen valley. The town has a population (2019) of 11,053 and a population density of . In Norway, Mandal is considered a which can be translated as either a "town" or "city" in English. The town lies along the European route E39 highway, about southwest of the town of Kristiansand and about southeast of the town of Flekkefjord. Mandal has a few suburban villages lying just outside its borders such as Ime immediately to the east and Sånum to the southwest. The village of Krossen lies about to the north, along the Mandalselva river. History The area in which today's town of Mandal is located was not developed during the Middle Ages. During the 1300s, a trading post called ''Vester-Risør'' grew up along the Skogsfjorden, j ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
