Vastergotland-class submarine

The Västergötland class of diesel-electric submarines was introduced in 1987 by the Swedish Navy. The original four ships of her class, HMS Västergötland, HMS Hälsingland, HMS Södermanland, and HMS Östergötland, were built between 1983 and 1988 by Kockums AB. The latter two have undergone comprehensive refits, including the insertion of a new hull section with an air-independent propulsion system equipped with Stirling engines. They have been recommissioned as the new Södermanland class.

The other two had been put in reserve until November 2005, when they were sold to the Republic of Singapore Navy as the Archer class. They are to be refitted to Södermanland-class standards and receive additional climatisation for use in tropical waters.

Vastergotland-class submarine
Class Ship
Type Submarine
Manufacturer Kockums Naval Solutions
Production Period 1984 - 1988
Origin Sweden
Country Name Origin Year
Sweden 1986
Country Name Operational Year Retirement Year
Singapore 1987 View
Sweden 1987 View
ManufacturerName Production From Production To Quantity
Kockums Naval Solutions 1984 1988 4 View

Ships in Class

Ship name Laid down Launched Commissioned Service Status
19 July 1986 27 November 1987 1st Submarine flotilla Sold to Republic of Singapore Navy 2005 (deal finished 2008)
Recommissioned as Archer-class submarine, achieved full operational capability on 2 Dec 2011
HMSHelsingland 1 January 1984 31 August 1987 20 October 1988 1st Submarine flotilla Sold to Republic of Singapore Navy 2005 (deal finished 2008), training and retrofitting in Sweden
12 April 1988 21 April 1989 1st Submarine flotilla Refitted 2003-2004 to Södermanland class, active
9 December 1988
1st Submarine flotilla Refitted 2003-2004 to Södermanland class, active

Class overview
Builders: Kockums
Operators:  Swedish Navy
 Republic of Singapore Navy
Preceded by: Näcken class
Succeeded by: Gotland class
Planned: 4
Completed: 4
Active: 2 (As Södermanland class)
General characteristics
Displacement: Surfaced: 1,070 t (1,050 long tons; 1,180 short tons)
Submerged: 1,150 t (1,130 long tons; 1,270 short tons)
Length: 48.5 m (159 ft 1 in)
Beam: 6.1 m (20 ft 0 in)
Draft: 5.6 m (18 ft 4 in)
Propulsion: 2× Hedmora V12A/15
1× Jeumont-Schneider electric motor
Speed: Surfaced: 11 kn (20 km/h; 13 mph)
Submerged: 20 kn (37 km/h; 23 mph)
Complement: 18 officers
6 conscripts
Sensors and
processing systems:
Armament: 6× 533mm tubes
3× 400-mm tubes

End notes