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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.〔(【引用サイトリンク】title=Kongsberg to Supply MINESNIPER Mk III Mine Disposal Weapon System to Royal Norwegian Navy )〕
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, again one in each hull, gives a low acoustic signature. A degaussing system gives the vessels extremely low electromagnetic signature.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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