Wikipedia

HSwMS Gotland (Gtd)

(Redirected from HMS Gotland (Gtd))
For other ships with the same name, see HSwMS Gotland.

HSwMS Gotland (Gtd) is a defense[2] submarine of the Swedish Navy. It was the first ship of the Gotland-class, which was the first operational submarine class in the world to use air-independent propulsion in the form of Stirling engines which use liquid oxygen and diesel as the propellant.

HSwMS Gotland
History
Sweden
NameGotland
NamesakeSwedish island Gotland
BuilderKockums
Laid down10 October 1992
Launched2 February 1995
CommissionedApril 1996
HomeportKarlskrona, Sweden
Identification
Motto
  • Gothus sum, cave cornua[1]
  • (I am a Gothlander, watch out for the horns)
Statusin active service
Badge
General characteristics
Class and typeGotland-class submarine
Displacement1,380 tons standard, 1,599 tons submerged[1]
Length60.4 metres (198 feet 2 inches)[1]
Beam6.2 metres (20 feet 4 inches)[1]
Draught5.6 metres (18 feet 4 inches)[1]
Propulsiontwo diesel engines (1,300 bhp (970 kW) each), two Stirling engines (75 kW (101 hp) each), one electric motor (1,800 shp (1,300 kW)), one shaft
Speed11 knots (20 km/h; 13 mph) surfaced,[1] 20 knots (37 km/h; 23 mph) submerged
Enduranceover 14 days submerged without snorkeling
Test depth500 ft (150 m)
Complement18–22 officers,[1] 6–10 enlisted[1]
Armament
  • 4 × 533 mm (21 in) torpedo tubes with 12 torpedoes
  • 2 × 400 mm (16 in) torpedo tubes with 6 torpedoes
  • 48 external mines

It was built by Kockums, launched in 1995, and subsequently commissioned in 1996.

In 2015, Sweden's Defense Material Administration (FMV) signed a contract with Saab Kockums which included a mid-life upgrade of two members of the Gotland class, Gotland and Halland, for SEK 2.1 billion. Gotland is expected to return to the FMV in late 2018 following a series of platform and combat systems upgrades.[3]

Construction

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The submarine Gotland was designed and built by Kockums in Malmö and launched on 2 February 1995. The honor guard during the launching consisted of the amphibian company of the Fårösund Marine Brigade (FMB). Participants from Gotland included the governor, the municipal council chairman, the commander of the Gotland Military Command and the commander of FMB.[4]

The submarine is essentially based on the Västergötland-class submarine, but with a lot of improvements.[5] It has two diesel engines and two Stirling engines which gives air independence and doubled endurance compared with previous submarine types.[1] A gas cycle drives a generator that charges the submarines battery which is connected to the propeller engine. For passive reconnaissance, she is equipped with circular sonar and flank array sonar.[1]

Mid-life upgrade

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In 2020, HSwMS Gotland did undergo a mid-life upgrade, as her sister HSwMS Uppland before her. During the upgrade, a number of systems that will be used in the next generation submarines, the Blekinge-class (A26), was installed. More than 20 new systems on board the new Gotland-class was implemented, which contributes to their de-risking for the A26. This also offers training opportunities for the crew when they, in the future, deploy on board the A26.

The upgrade process entails many new systems, such as the Stirling AIP, a complete new mast suite, sonars and sensors as well as management and communication systems. In order to host all systems, the submarine has gained length to 62 m and another 200 ton in weight, to reach a displacement (surfaced) of 1580 tons.

Lease to the United States Navy

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In 2004, the Swedish Government received a request from the United States of America to lease Gotland—Swedish-flagged, commanded, and manned—for one year for use in anti-submarine warfare exercises. The Swedish Government granted this request in October 2004, with both navies signing a memorandum of understanding on 21 March 2005.[6][7]

Gotland was loaded on board the Norwegian semi-submersible heavy-lift ship, MV Eide Transporter, on 10 May 2005, for a month-long voyage over the Atlantic Ocean and through the Panama Canal to Naval Base Point Loma in San Diego, California, where it arrived on 27 June 2005.[8][9][10] After a couple weeks of getting accustomed to the new environment, the exercises with United States Third Fleet began on 18 July 2005.[11] The lease was extended for another 12 months in 2006.[12][13][14]

Gotland managed to penetrate the defensive measures of Carrier Strike Group 7 undetected and snap several pictures of USS Ronald Reagan during the December pre-deployment Joint Task Force Exercise 06-2 (JTFEX 06-2) in the Pacific Ocean (probably in the California Operating Areas), effectively "sinking" the aircraft carrier.[15] The exercise was conducted to evaluate the effectiveness of the US Fleet against modern diesel-electric submarines, which some have noted as severely lacking.[16][17] In 2001, during the exercise JTFEX 01-2 in the Caribbean Sea, the German U24 of the conventional 206 diesel-electric class "sank" the carrier Enterprise by firing flares and taking a photograph through its periscope.[18]

In July 2007, Gotland departed San Diego for Sweden.[19]

Raid against Kockums

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In the early morning of 8 April 2014, the Defence Materiel Administration, known as FMV, with the help of the Swedish Army, raided the Kockums shipyard in Malmö, Sweden, then owned by German defense giant ThyssenKrupp Marine Systems. The goal of the mission was to confiscate material belonging to the Swedish state, especially hardware relating to the Stirling engines used in HSwMS Gotland. Although the raid was performed by military police it was not violent. After Kockums employees locked the gates blocking FMV's exit with the confiscated material, a long drawn-out negotiation ensued. A compromise was finally struck in which the hardware was to be stored at a shared secure area until further notice. Since FMV was only interested in the hardware rather than the blueprints, the show of force was more likely part of a long political confrontation between the Swedish state and the owners of Kockums, rather than an attempt at discouraging espionage.[20][21] Later in 2014, Kockums was sold to Saab Group.[22]

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  •  
    HSwMS Gotland onboard MV Eide Transporter in San Diego.
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    HSwMS Gotland transits through San Diego Harbor with the Nimitz-class USS Ronald Reagan following close behind during the "Sea and Air Parade"” held as part of Fleet Week San Diego 2005.
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    HSwMS Gotland, Ystad 2015.

See also

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References

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  1. ^ a b c d e f g h i j Arsenius, Rolf (2008). Haglund, Sven-Åke (ed.). "Jag är Gute - Akta dig för hornen" [I am a Gothlander, watch out for the horns]. Insats & Försvar (in Swedish) (1). Swedish Armed Forces: 26. ISSN 1652-3571.
  2. ^ Försvarsmakten. "Ubåt typ Gotland". Försvarsmakten (in Swedish). Archived from the original on 2018-07-28. Retrieved 2018-07-28.
  3. ^ Scott, Richard (8 July 2015). "Sweden signs deal for A 26 submarine order, A 19 upgrade". Jane's Defence Weekly. 52 (27): 4.
  4. ^ Hammarhjelm, Bengt (1999). Beredskap på Gotland 175 år: 1811-1986 (in Swedish) (2nd, utök. uppl., jämte komplement till 2000 ed.). Visby: Ödin. p. 286. ISBN 91-85716-84-7. SELIBR 7751982.
  5. ^ Adéll, Synnöve (2005). Petersson, Ulf (ed.). "Gotland i Stilla Havet: USA Nästa" [Gotland in the Pacific: USA Next]. Insats & Försvar (in Swedish) (2). Swedish Armed Forces: 10. ISSN 1652-3571.
  6. ^ "US Navy Leasing Swedish Gotland-Class Submarine". Deagel. Retrieved 2004-11-05.
  7. ^ "U.S., Swedish Navies Sign Agreement to Bilaterally Train on State-of-the-Art Sub" (Press release). United States Navy. 2005-03-23. Archived from the original on 2007-08-19.
  8. ^ "Eide Transporter arrives San Diego" (Press release). Eide Group. 2005-06-22. Archived from the original on 2007-05-10. Retrieved 2008-04-06.
  9. ^ "Swedish Submarine HMS Gotland Arrives in San Diego". United States Navy. 2005-06-30. Archived from the original on 2008-01-17. Retrieved 2008-04-06.
  10. ^ "Why is the U.S. Navy Leasing a Swedish Submarine?". The Jewish Institute for National Security Affairs. Archived from the original on 2005-09-30. Retrieved 2005-03-04.
  11. ^ "Swedish Submarine Continues to Play Important Role in Joint Training" (Press release). United States Navy. 2005-12-20. Archived from the original on 2008-02-14.
  12. ^ "US Navy to continue hunt for Swedish sub". The Local. 2006-04-18. Archived from the original on 2009-03-29. Retrieved 2006-07-21.
  13. ^ "Gotland extends US stay for another year" (Press release). Kockums AB. 2006-06-13. Retrieved 2006-07-21.
  14. ^ "HMS Gotland's Stirling propulsion system basis of success in the USA" (Press release). Kockums AB. 2007-05-09.
  15. ^ "Pentagon: New Class Of Silent Submarines Poses Threat". KNBC. 2006-10-19. Archived from the original on 2007-11-16. Retrieved 2006-07-21.
  16. ^ Polmar, Norman (March 2006). "Back to the Future". U.S. Naval Institute Proceedings. 132 (3): 22–23. 0041-798X.
  17. ^ "US Navy Struggles to Recapture, Keep ASW Proficiency". The Nav Log. Archived from the original on 2009-02-02. Retrieved 2008-04-06.
  18. ^ "Deutsches U-Boot fordert US-Marine heraus" (in German). t-online. 2013-01-06. Retrieved 2020-12-18.
  19. ^ "SSK Gotland Class (Type A19) Attack Submarine, Sweden". Naval Technology. Retrieved 2008-04-06.
  20. ^ "'Baffling' Swedish raid on German sub makers". The Local. 15 April 2014. Retrieved 21 December 2014.
  21. ^ Sköld, Josefin (19 May 2014). "Sanningen om den hemliga gryningsräden mot Kockums" [The truth about the secret dawn against Kockums]. Dagens Nyheter (in Swedish). Retrieved 21 December 2014.
  22. ^ "Saab Completes Acquisition of TKMS AB (Kockums)". Saab (Press release). 22 July 2014. Retrieved 23 October 2017.
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