Alta-class minesweeper: Difference between revisions

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{{Short description|ClassNorwegian class of Royal Norwegian Navy minesweepers}}

{{more citations needed|date=February 2013}}

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|Ship type=[[Minesweeper (ship)|Minesweeper]]

|Ship tonnage=

|Ship displacement= 375 tonnes<ref>{{Cite web |url=https://forsvaret.no/en/facts/equipment/oksoy-class-and-alta-class |title=ArchivedOksøy-class copyand Alta-class - Forsvaret.no |access-date=2017-05-22 |archive-date=2017-07-01 |archive-url=https://web.archive.org/web/20170701010324/https://forsvaret.no/en/facts/equipment/oksoy-class-and-alta-class |url-status=dead }}</ref>

|Ship length= 55.2 metres

|Ship beam= 13.6 metres

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==Design==

The ''Alta'' class was built by [[Kværner]] [[Mandal, Norway|Mandal]] during 1996 and 1997, while the related ''Oksøy'' class was built in 1994 and 1995. A total of 9nine vessels were built, 5five minesweepers and 4four minehunters. The [[catamaran]] hull is built in a [[Glass-reinforced plastic|fibre-reinforced plastic]] sandwich of very low magnetic signature.<ref>{{cite web |url=http://www.navyrecognition.com/index.php/news/defence-news/year-2013-news/september-2013-navy-world-naval-forces-maritime-industry-technology-news/1253-kongsberg-to-supply-minesniper-mk-iii-mine-disposal-weapon-system-to-royal-norwegian-navy-.html |title=Kongsberg to Supply MINESNIPER Mk III Mine Disposal Weapon System to Royal Norwegian Navy |date=September 20, 2013}}</ref>

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 [[Pump-jet|water jet]], again one in each hull, gives a low acoustic signature. A degaussing system gives the vessels extremely low electromagnetic signature.

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! Commissioned

! Status

|rowspan=6|[[File:Knm-orkla-burning-2002-11-19.jpg|thumb|KNM ''Orkla'' burning outside [[Ålesund]], Norway in November 2002.]]

|-

|M350

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|rowspan=5|[[Kværner]], [[Mandal, Norway|Mandal]]

|12 January 1996

|Scrapped some time prior to 23 July 2022<ref>{{cite web |title=Scrapyard Ships |url=https://www.shipspotting.com/photos/gallery?category=70&imo=4907517 |website=shipspotting.com |accessdate=15 February 2023}}</ref>

|

|-

|M351

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==Service history==

''Orkla'' was destroyed by fire on 19 November 2002.<ref name=orklaloss/> ''Glomma'' is no longer in active service. Alta was scrapped along with the Oksøy class M341 Karmøy prior to 23 July 2022

==References==

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*[http://www.naval-technology.com/projects/oksoy/ Oksøy and Alta class]

*[https://web.archive.org/web/20140201225714/http://www.altaclass.com/ Alta class]

*[https://www.globalsecurity.org/military/world/europe/knm-oksoy.htm Alta / Oksoy Surface Effect Ship (SES)]

{{Royal Norwegian Navy}}