Challenger class Attack Submarine Republic of Singapore Navy

Republic of Singapore Navy
Challenger class Submarine

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03/24

Units:

RSS Challenger (2000)
RSS Conqueror (2001)
RSS Chieftain (2002)
RSS Centurion (2004)

Specifications:

Builder: Kockums AB, Malmö, Sweden
Length: 50 meters (164 feet 1 inch)
Beam: 6.1 meters (20 ft)
Draft: 5.1 meters (16 ft 9 in)
Displacement: 1130 tons (surfaced) / 1400 tons (submerged)
Speed: 15 knots (28 km/h) surfaced / 20 knots (37 km/h) submerged
Range:
Complement: 23

Propulsion:
2 x Pielstick diesel engines
1 x ASEA electric motor
1 shaft / 1 propeller

Armament:
4 x 21-inches (533 mm) torpedo tubes
2 x 16-inches (400 mm) torpedo tubes

The Challenger class is one of the submarine classes of the Singapore Navy. They are extensively modernized versions of ex-Sjöormen class submarines.

In 1995, the RSN acquired a Challenger class (formerly known as Sjöormen class) submarine from the Swedish Navy and another three in 1997, making them Singapore's first underwater platforms. It is believed that the Challenger class were purchased to develop the required submarine operations expertise before selecting a modern class of submarines to replace them, since all the boats are over 40 years old.

Swedish Royal Navy service:
HMS Sjöbjörnen: launched - January 9, 1968 / commissioned - July 31, 1968
HMS Sjölejonet: launched - July 29, 1967 / commissioned - December 16, 1968
HMS Sjöormen: launched - January 25, 1967 / commissioned - July 31, 1968
HMS Sjöhunden: launched - March 21, 1968 / commissioned - June 25, 1969

Singapore Navy service:
RSS Challenger (ex HMS Sjöbjörnen): launched - September 26, 1997 / commissioned - ? / decommissioned on March 11, 2015
RSS Conqueror (ex HMS Sjölejonet): launched - May 28, 1999 / commissioned - July 22, 2001 / ACTIVE (2024)
RSS Centurion (ex HMS Sjöormen): launched - May 28, 1999 / commissioned - June 26, 2004 / decommissioned on March 11, 2015
RSS Chieftain (ex HMS Sjöhunden): launched - May 22, 2001 / commissioned - August 24, 2002 / ACTIVE (2024)

source: wikipedia+

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