 RSS Chieftain
| |
| Class overview | |
|---|---|
| Builders | Kockums |
| Operators | list error: <br /> list (help) Swedish Navy  Republic of Singapore Navy |
| Preceded by | Draken |
| Succeeded by | Näcken |
| Planned | 5 |
| Completed | 5 |
| Active | 4 |
| Retired | 1 |
| General characteristics | |
| Displacement | list error: <br /> list (help) Surfaced: 1,125 t (1,107 long tons; 1,240 short tons) Submerged: 1,400 t (1,400 long tons; 1,500 short tons) |
| Length | 50 m (164 ft 1 in) |
| Beam | 6.1 m (20 ft 0 in) |
| Draught | 5.1 m (16 ft 9 in) |
| Propulsion | list error: <br /> list (help) 1 shaft 2× Pielstick diesel 1× ASEA electric motor |
| Speed | list error: <br /> list (help) Surfaced: 15 kn (28 km/h; 17 mph) Submerged: 20 kn (37 km/h; 23 mph) |
| Complement | 23 |
| Sensors and processing systems | FAS |
| Armament | list error: <br /> list (help) 4× 533 mm (21 in) Torpedo tubes 2× 400 mm (16 in) Torpedo tubes Mines |
The Sjöormen class were a group of submarines built for the Swedish Navy in the late 1960s. They had a teardrop shape and were capable of diving to 150m. At the time of their deployment they were regarded as one of the most advanced non-nuclear submarine-classes in the world, incorporating many new features including x-rudder and anechoic tiles. Both speed and underwater endurance was at this time very high for a conventional submarine. The ships were retired by Sweden in the early 1990s.
Sale to Singapore edit
Four of the ships were sold to Singapore in 1996 and modernised in the late 1990s by Kockums. Various modifications were required to suit the boats to tropical waters. A comprehensive tropicalisation programme was carried out for all four submarines, which involved installing air conditioning, marine growth protection systems and corrosion-resistant piping. As of 2010[update], they are currently in service with the Republic of Singapore Navy as the Challenger class.
Ships edit
| Ship | Builder | Launched | Commissioned | Status |
|---|---|---|---|---|
| Sjöormen / Centurion | Kockums | 25 Jan 1967 | 31 July 1968 | In Service with Singapore Navy |
| Sjölejonet / Conqueror | Kockums | 29 June 1967 | 16 Dec 1968 | In Service with Singapore Navy |
| Sjöbjörnen / Challenger | Karskrona Navy yard | 9 Jan 1968 | 28 Feb 1969 | In Service with Singapore Navy |
| Sjöhunden / Chieftain | Kockums | 21 March 1968 | 25 June 1969 | In Service with Singapore Navy |
| Sjöhästen | Karskrona Navy yard | 6 Aug 1968 | 15 Sept 1969 | Sold to Singapore in 1995 used for spare parts |
References edit
- Notes
- Bibliography
- Conway's All the World's Fighting Ships 1947-1995
External links edit
 Swedish Navy | |
|---|---|
| Republic of Singapore Navy Challenger class |
|
| |