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Royal Swedish Navy - Svenska Marinen Stockholm class Corvette / Patrol Vessel |
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| 08/22 | ||
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K11 / P11 HSwMS Stockholm K12 / P12 HSwMS Malmö |
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| Specifications: | ||
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Builder: Karlskronavarvet AB (later Kockums), Karlskrona, Blekinge County, Sweden Displacement: 380 tons Length: 50 m (164 feet 1 inch) Beam: 7.5 m (24 ft 7 in) Draft: 2.6 m (8 ft 6 in) Speed: 30 knots (56 km/h) Range: ? Complement: 35 Propulsion: Combined Diesel and Gas (CODAG) 2 x MTU 16V 396 TB93 diesel engines (1920 kW / 25700 hp, each) 1 x Allied Signal/Allison Gas Turbine (4715 kW / 6323 hp) 2 shafts / 2 propellers Armament (as built): 1 x Bofors 57/L70 Mk.2 gun 1 x Bofors 40mm gun 2 x 533mm Torpedo Tubes for Type 613 Torpedo up to 8 x RBS 15 Mk.2 anti-ship missiles (SSM) Armament (current): 1 x Bofors Mk.2 57mm DP gun 4 x 400mm torpedo launchers for Torped 45 lightweight torpedoes up to 8 x RBS 15 Mk.2 anti-ship missiles (SSM) mines + depth charges Systems: Sea Giraffe 50HC air/surface search radar 9LV 300 fire control radar (missile) 90LV 100 optronic Simrad SS 304 Spira hull-mounted sonar (HMS) Salmon TSM 2642 variable-depth sonar (VDS) Rheinmetall TKWA/MASS (Multi Ammunition Softkill System) Aviation: none |
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The Stockholm class started as a study for a ship with increased
endurance, a project called Ytattack-81 (Surface combatant-81),
which was built on the torpedo boats of the Spica and Spica II
classes, but with an increased displacement from 230 to 350 tonnes
(230 to 340 long tons). The engine was to be a CODAG-concept, two
diesels and one gas turbine. However, the class looked to become
just another desktop project. In the early 1980s a series of submarine incidents occurred within Swedish territorial waters, the most famous of which was U 137 which ran aground outside Karlskrona in 1981. These incidents showed that the Swedish Navy was seriously lacking in its anti-submarine (ASW) capacity. Specifically, it needed new hulls designed to anti-submarine warfare, and it needed them fast. The decision was to use the Ytattack-81 project and modify it for ASW operations, as designing a completely new ship is a time-consuming and costly task. It was given a towed array sonar, ASW torpedoes and the ELMA anti-submarine mortar system. HSwMS Stockholm was launched on 22 August 1984 closely followed by HSwMS Malmö on 23 March 1985, both ships entered service on 1 May 1986. In the middle of the 1990s the ships started to show their age, mainly because of their high mileage and the latest few years explosive development of electronics. The Stockholm class was a successful design and the ships' basic status was good despite a hard life so the Swedish Defence Administration decided to give the ships a second life. Malmö was the first to be modernised in 1999 with Stockholm following in 2000. The modernisation included new engines, combat control systems, fire control systems, SIGINT and navigational systems. The ships both went through extensive modification of the mast, hull and superstructure to reduce their radar cross-section. Much of the modification was also made with low maintenance in mind to minimise the need for expensive repairs in the future. The guiding principle for the project was to update as much of the systems as possible to the same level as the Visby-class corvettes. Both ships are back in operational condition now, attached to the 31st Corvette Division of the 3rd Naval Warfare Flotilla. In early 2009 the Swedish government decided that the two ships in the class was to join the EU-led taskforce outside Somalia, where it would fight piracy. In May 2009 the ships started their first patrol off the Somali coast. On 26 May, Malmö responded to a pirate attack on the Greek ship MV Antonis. The corvette fired warning shots with its 57 mm cannon and arrested seven pirates. In 2015, Saab was awarded a contract to overhaul the Stockholm-class corvettes and the ships were redesignated as patrol boat s. The ships retained most of their weaponry and continue to be stationed at the Karlskrona naval base. |
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 P11 HSwMS Stockholm  P11 HSwMS Stockholm  K11 HSwMS Stockholm  K11 HSwMS Stockholm  K11 HSwMS Stockholm  K11 HSwMS Stockholm  K11 HSwMS Stockholm  K11 HSwMS Stockholm  P12 HSwMS Malmö  K12 HSwMS Malmö  K12 HSwMS Malmö  K12 HSwMS Malmö  K12 HSwMS Malmö  K12 HSwMS Malmö  K12 HSwMS Malmö  K12 HSwMS Malmö  cutout  K12 HSwMS Malmö K12 HSwMS Malmö  K12 HSwMS Malmö  main armament UNIDENTIFIED UNITS    |
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