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Norwegian Alta-class minesweeper Rauma (M352)
|Name:||Alta class minesweeper|
|Builders:||Kvaerner Mandal, Mandal, Norway|
|Operators:||Royal Norwegian Navy|
|General characteristics |
|Propulsion:||2 × 2.7 MW (3,621 hp) MTU 12V 396 TE84 diesel engines
2 × Kvaerner water jets
|Speed:||Over 20 knots (37 km/h; 23 mph)|
|Range:||1,500 mi (2,400 km)|
|Oropesa mechanical sweep
Kongsberg Defence & Aerospace (KDA) Agate (Air Gun and Transducer Equipment) acoustic minesweeping system
Elma magnetic sweepers
|Armament:||• 1 × Sadral surface-to-air missile system
• 1 or 2 × Rheinmetall 20 mm AA guns
• 2 × 12.7 mm machine guns
The Alta class was built by Kvaerner 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. HNoMS Orkla was completely destroyed in a fire, and HNoMS Oksøy was damaged when it ran aground in 2005. The pair, along with HNoMS Glomma, are no longer in active service. 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, again one in each hull, gives a low acoustic signature. A degaussing system gives the vessels extremely low electromagnetic signature.
- "Oksoy and Alta Class Minesweepers and Minehunters - Naval Technology". naval-technology.com. Archived from the original on 17 March 2010. Retrieved 2 March 2010.
- "Kongsberg to Supply MINESNIPER Mk III Mine Disposal Weapon System to Royal Norwegian Navy". September 20, 2013.
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