HSwMS Sjöhästen (Shä)

HSwMS Sjöhästen (Shä), Sw. meaning sea horse, was the fifth and last ship of the Swedish submarine class Sjöormen, project name A11.[1]

HSwMS Sjöhästen underway date unknown.
History
Sweden
Name: HSwMS Sjöbjörnen
Ordered: 1966
Builder: Karlskrona naval base
Launched: 6 August 1968
Commissioned: 19 May 1969
Decommissioned: 1997
Motto: Mares pegasus
Nickname(s): Shä
Fate: Sold to Singapore in 1997
Singapore
Acquired: 28 May 1999
Homeport: Changi Naval Base, Singapore
Fate: Scrapped, used as spare part.
General characteristics
Class and type: Sjöormen-class submarine
Displacement:
  • 1,130 t (1,112 long tons) surfaced
  • 1,210 t (1,191 long tons) submerged
Length: 50.5 m (165 ft 8 in)
Beam: 6.1 m (20 ft 0 in)
Draught: 5.8 m (19 ft 0 in)
Propulsion:
  • 2 × Hedemora Diesel generators
  • 1 × electric motor
  • 1 shaft
Speed: 20 knots (23 mph; 37 km/h)
Complement: 25 officers and enlisted
Armament:

Development

The planning of the class included a number of different AIP-solutions including nuclear propulsion, however the ships where finally completed with for the time extremely large batteries. The ship was a single hull submarine, with hull shape influenced by the American experimental submarine USS Albacore (AGSS-569). The hull was covered with rubber tiles to reduce the acoustic signature (Anechoic tiles), at this time a pioneer technology. The Sjöormen-class also pioneered the use of an x-shaped (as opposed to cross-shaped) rudder as a standard (as opposed to experimental) feature.[2][3]

Service in Sweden

The submarine served in the Swedish Navy for almost 30 years and was then sold to Singapore in 1997 together with its four sister ships.

Service in Singapore

HSwMS Sjöhästen was sold to Singapore on 28 May 1999. She was never commissioned instead used as a spare part.

  • HSwMS Sjöhästen Gallery
  • HSwMS Sjöhästen being launched on 6 August 1968.
  • HSwMS Sjöhästen underway between 1967–1968.
  • HSwMS Sjöhästen underway in 1968.
  • HSwMS Sjöhästen underway in 1968.
  • HSwMS Sjöhästen underway in 1968.
  • HSwMS Sjöhästen underway in 1968.
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References
  1. "HMS Sjöhästen (Shä)", Wikipedia (in Swedish), 2019-09-02, retrieved 2020-07-30
  2. "CHALLENGER CLASS SUBMARINE". Ministry of Defense Singapore. Retrieved 29 July 2020.
  3. "HMS Sjöhästen (Shä) : definition of HMS Sjöhästen (Shä) and synonyms of HMS Sjöhästen (Shä) (Swedish)". dictionary.sensagent.com. Retrieved 2020-07-30.


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