HSwMS Sjölejonet (Sle)

HSwMS Sjölejonet (Sle), Sw. meaning sea lion, was the second ship of the Swedish submarine class Sjöormen, project name A11.[1]

HSwMS Sjölejonet being launched on 29 June 1967
History
Sweden
Name: HSwMS Sjölejonet
Ordered: 1965
Builder: Karlskrona naval base
Launched: 29 June 1967
Commissioned: 16 December 1968
Decommissioned: 1997
Motto: In omnia paratus ("Ready for anything")
Nickname(s): Sle
Fate: Sold to Singapore in 1997
Singapore
Name: RSS Conqueror
Namesake: Conqueror
Acquired: 28 May 1999
Commissioned: 26 June 2004
Homeport: Changi Naval Base, Singapore
Status: Active
General characteristics
Class and type:
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 (37 km/h; 23 mph)
Complement: 25 officers and enlisted
Armament:
  • 4 × 533 mm (21 in) torpedo tubes
  • 2 × 400 mm (16 in) torpedo tubes

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-hulled submarine, with hull shape influenced by the American experimental submarine USS Albacore. 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]

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 Sjöbjörnen was renamed RSS Conqueror and Singapore reacquired the boat on 28 May 1999. She was commissioned on 26 June 2004 after a major refit. After 11 years in the Republic of Singapore Navy, she was in active as of 2020.

  • HSwMS Sjölejonet & RSS Conqueror Gallery
  • HSwMS Sjölejonet being towed out of harbor after her being launched in July 1967.

References
  1. "HMS Sjöbjörnen (Sbj)", Wikipedia (in Swedish), 2019-09-18, retrieved 2020-07-29
  2. "CHALLENGER CLASS SUBMARINE". Ministry of Defense Singapore. Retrieved 29 July 2020.


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