Vastergotland
Initial Operational Capability (IOC) : 1987
Total Production : 4
Model | Status | Year | Produced |
---|---|---|---|
Vastergotland | Active | 1987 | 4 |
Vastergotland
Group : Attack Submarines
Status : Active
Also Known As : Archer (Republic of Singapore Navy), Sodermanland, Type A-17
Origin : Sweden
Contractor : Howaldtswerke-Deutsche Werft GmbH
Initial Operational Capability (IOC) : 1987
Total Production : 4
The Vastergotland class was introduced in 1987 by the Swedish Navy to perform attack missions in the coastal environment of the colder northern waters. Four boats of this class were procured between 1987 and 1990. Currently, only the last two ships remain in active service. Due to a modernization program applied to the remaining boats the class has been re-named Sodermanland. The Sodermanland class submarines have a stretched hull compared to Vastergotland class among other improvements.
The Sodermanland comprises the HMS Sodermanland and HMS Ostergotland boats which have been fitted with Stirling Air Independent Propulsion system. The Stirling section adds 12 meters to the submarine length and is installed aft of the boat's tower. The first boat will undergo the modernization program in 2003 and the second boat in 2004. In July 2004, Kockums announced that both ships were ready for operational service with the Swedish Navy acceptance of these ships expected by autumn 2004.
A state-of-the-art command and control system was added to the weapon system and stealth characteristics have been improved for enhanced survivability. The Sodermanland-class, like the Vastergotland-class, has 6 533mm torpedo tubes and 3 400mm torpedo tubes and can accommodate up to 18 torpedoes or 22 mines.
In addition to the Stirling AIP, the Sodermanland submarines have been fitted to undertake missions in warmer and more saline waters than those surrounding Sweden. This goal has been achieved replacing the refrigeration system by an entirely new one. That seems to be clearly aimed at performing international peacekeeping missions. Kockums hopes that updated Sodermanland-class boats will remain in service for the next 20 years.
The Ostergotland submarine equipped with Stirling AIP-air independent propulsion system was delivered to the Swedish Navy in October 2004.
Singapore's Ministry of Defense signed an agreement with Kockums for the supply of two Vastergotland-class submarines to the Republic of Singapore Navy on 4 November 2005. Under the terms of the contract Kockums would deliver the two boats retrofitted for operation in tropical waters.
In January 2006 the Swedish Defense Materiel Administration (FMV) awarded Saab a contract for the supply of four SESUB 960 command and control systems to the Swedish Navy's Gotland and Sodermanland submarines. SESUB 960 were designed to provide network-based defense capabilities. In addition, the order also included improvements to the navigation system, sensor management and weapons handling as well as a crew training facility on land.
Operators
Specifications
Notes | ||
---|---|---|
Crew | 20 | |
Number of Weapons | 18 | |
Torpedo Tubes | 9 | |
Dimensions | ||
Beam | 6.1 meter | |
Length | 60.5 meter | |
Mass | ||
Displacement Submerged | 1,500 ton | |
Speed | ||
Top Speed Submerged | 10.3 mps |
Gear
Ship Power Plants | ||
---|---|---|
Stirling AIP | ||
Unmanned Underwater Vehicles | ||
AUV 62 |
Listing
Ship | Status | Com | Decom |
---|---|---|---|
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Active | June 16, 2009 1987 |
2006 |
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Active | October 20, 2010 1988 |
2006 |
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Active | 1989 | 2028 |
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Active | 1990 |
News

Saab has received new orders from FMV regarding submarine upgrades. The orders include a life-time extension of HMS Södermanland, as well as new batteries and battery development.
The trend of naval expansion is not limited to global powers like China, Russia and the US: The Republic of Singapore Navy has moved to beef up its fleet, too.
CHARLOTTESVILLE, Va. – March 9, 2010 – Northrop Grumman Corporation (NYSE:NOC) has won a contract to upgrade the inertial navigation systems (INS) for the Swedish navy's submarines.

Mrs Teo Chee Hean, wife of Deputy Prime Minister and Minister for Defence, named the first submarine in the Northern Light project, the second submarine project conducted
Kockums has received an order for Stirling engines from the Swedish Defence Matériel Administration.
Singapore Technologies Engineering Ltd (ST Engineering) today announced that its marine division, Singapore Technologies Marine Ltd (ST Marine) has signed a Memorandum of
Kockums receipt of an order for a general refit of the Royal Swedish Navy submarine HMS Södermanland has now been confirmed.
Kockums, which is part of ThyssenKrupp Marine Systems, has signed a contract with Singapore's Ministry of Defence to supply two Vastergotland-class submarines to the
Photo Gallery
September 2022

HMS Sodermanland submarine
June 2009

Launching ceremony for RSS Archer
December 2006

Vastergotland
Notes
State Latest Known holdings/Original Procurement
Com - Date of Commissioning
Decom - Date of Decommissioning
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