HSwMS ''Näcken'' (Näk) is the
lead ship of
her class of
submarine
A submarine (or sub) is a watercraft capable of independent operation underwater. It differs from a submersible, which has more limited underwater capability. The term is also sometimes used historically or colloquially to refer to remotely op ...
for the
Swedish Navy
The Swedish Navy ( sv, Svenska marinen) is the naval branch of the Swedish Armed Forces. It is composed of surface and submarine naval units – the Fleet () – as well as marine units, the Amphibious Corps ().
In Swedish, vessels o ...
. She was launched at the
Kockums shipyard in
Malmö
Malmö (, ; da, Malmø ) is the largest city in the Swedish county (län) of Scania (Skåne). It is the third-largest city in Sweden, after Stockholm and Gothenburg, and the sixth-largest city in the Nordic region, with a municipal populat ...
,
Sweden
Sweden, formally the Kingdom of Sweden,The United Nations Group of Experts on Geographical Names states that the country's formal name is the Kingdom of SwedenUNGEGN World Geographical Names, Sweden./ref> is a Nordic country located on ...
, on 17 April 1978, and completed and
commissioned into the Swedish Navy in April 1980. From 2001 to 2005, the submarine was leased to the
Royal Danish Navy and operated as HDMS ''Kronborg'' (S325). She was restored to her original name of ''Näcken'' upon her return to Swedish control. She was scrapped in Karlskrona during 2015–2016.
History
Refit
In November 1987, ''Näcken'' began a major refit at Kockums. This involved installing two closed circuit Tilsa Stirling diesel engines. This new diesel, the Stirling V4-275R, provides
air-independent propulsion
Air-independent propulsion (AIP), or air-independent power, is any marine propulsion technology that allows a non-nuclear submarine to operate without access to atmospheric oxygen (by surfacing or using a snorkel). AIP can augment or replace the ...
which allows the submarine to operate continuously underwater.
[Saunders, p.169] However, in order to incorporate the new engine, the ship was lengthened by .
[Gardiner & Chumbly, p.447] The refit took until 6 September 1988.
[ The endurance of the vessel, following refit, increased to 14 days.][ ''Näcken'' became the test bed for the technology which was used in the later .][
]
Transfer to Denmark
''Näcken'' was transferred to Denmark
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, song_type = National and royal anthem
, image_map = EU-Denmark.svg
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, subdivision_type = Sovereign state
, subdivision_name = Danish Realm, Kingdom of Denmark
...
in 2001 as part of a deal for the design and construction of the project. The boat was leased by Denmark with an option to buy in 2005. Before the transfer, Denmark had the communications systems aboard upgraded. The submarine was recommissioned as ''Kronborg'' on 17 August 2001 at Aalborg
Aalborg (, , ) is Denmark's fourth largest town (behind Copenhagen, Aarhus, and Odense) with a population of 119,862 (1 July 2022) in the town proper and an urban population of 143,598 (1 July 2022). As of 1 July 2022, the Municipality of Aalb ...
.[ Denmark had acquired ''Kronborg'' partly to keep a submarine service and partly to train crews on air-independent propulsion in preparation for the Viking class. However, in June 2004, the Danish parliament voted to end the submarine service. On 27 October 2004, ''Kronborg'' was decommissioned at ]Karlskrona
Karlskrona (, , ) is a locality and the seat of Karlskrona Municipality, Blekinge County, Sweden with a population of 66,675 in 2018. It is also the capital of Blekinge County. Karlskrona is known as Sweden's only baroque city and is host to Swed ...
and returned to Sweden.[
]
Notes
References
*
*
Miramar ship index
Näcken-class submarines
Ships built in Malmö
1978 ships
Näcken-class submarines of the Royal Danish Navy
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