Archer-class submarine

The Archer-class submarines are a class of two diesel-electric submarines in active service with the Republic of Singapore Navy (RSN). Originally launched as the Swedish Navy Västergötland-class submarines HSwMS Hälsingland and HSwMS Västergötland in 1986 and 1987, the two submarines were sold to Singapore in November 2005 and relaunched in June 2009 and October 2010 respectively after extensive modernisation by Kockums, which included a refit to Södermanland class standards, the insertion of a new hull section with an air independent propulsion system, and additional climatisation for use in tropical waters.

For other ship classes of the same name, see Archer class.
RSS Swordsman alongside Changi Naval Base
Class overview
BuildersKockums
Operators Republic of Singapore Navy
Preceded byChallenger class
Succeeded byType 218SG
Completed2
Active2
General characteristics
Displacement
  • Surfaced: 1,400 t (1,400 long tons; 1,500 short tons)
  • Submerged: 1,500 t (1,500 long tons; 1,700 short tons)
Length60.5 m (198 ft 6 in)
Beam6.1 m (20 ft 0 in)
Draft5.6 m (18 ft 4 in)
Propulsion
  • 2 × Hedemora diesel-electric engines
  • 2 × Kockums v4-275R Sterling AIP units
Speed
  • Surfaced: 8 kn (15 km/h; 9.2 mph)
  • Submerged: 15 kn (28 km/h; 17 mph)
Complement28
Sensors and
processing systems		FAS
Armament
  • 6 × 533 mm (21 in) torpedo tubes for TP-617 heavy-weight torpedoes and Blackshark torpedoes
  • 3 × 400 mm (16 in) torpedo tubes
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