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Royal Swedish Navy - Svenska Marinen Visby class Corvette |
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| 08/22 |
| Units: |
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K31 HSwMS Visby K32 HSwMS Helsingborg K33 HSwMS Härnösand K34 HSwMS Nyköping K35 HSwMS Karlstad K36 HSwMS Uddevalla (cancelled) |
| Specifications: |
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Displacement: 640 tons Length: 72.7 m (239 feet) Beam: 10.4 m (34 ft) Draft: 2.4 m (7.9 ft) Speed: 35+ knots (65+ km/h) Range: 2500 NM (4600 km) at 15 knots (28 km/h) Complement: 43 Propulsion: Combined Diesel or Gas (CODOG) 4 x Vericor TF50A gas turbines (16 MW, total) 2 x MTU Friedrichshafen 16 V 2000 N90 diesel engines (2.6 MW, total) 2 x Kamewa 125SII steerable Waterjets Armament: 1 x Bofors 57/L70 Mk.3 gun 8 x RBS 15 anti-ship missiles (SSM) 2 x 400 mm torpedo launchers for Torped 45 or Torped 47 SLWT Lightweight Torpedo 127mm ASW rocket launchers Mines + depth charges Systems: Saab 9LV Mk.3E CETRIS combat management system Saab Sea GIRAFFE AMB 3D PESA surveillance radar Saab Ceros 200 fire control radar system Condor CS-3701 tactical radar surveillance system GDC Hull-mounted sonar Hydroscience Technologies towed array sonar system GDC variable depth sonar Rheinmetall TKWA/MASS (Multi Ammunition Softkill System) decoys Aviation: flight deck / no hangar |
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The hull is constructed with a sandwich design consisting of a PVC
core with a carbon fibre and vinyl laminate. There are multiple
advantages to using composite materials in ship hulls. Good
conductivity and surface flatness means a low radar signature, while
good heat insulation lowers the infrared signature and increases
survivability in case of fire. The composite sandwich used is also
non-magnetic, which lowers the magnetic signature. Composites are
also very strong for their relative weight, and less weight means a
higher top speed and better maneuverability. The composite weighs
roughly 50% less than the equivalent strength steel. Visby's angular tumblehome design reduces its radar signature. Jan Nilsson, one of the designers, told BBC News Online: "We are able to reduce the radar cross-section by 99%. That doesn't mean it's 99% invisible, it means that we have reduced its detection range." The 57 mm cannon barrel can be folded into the turret to reduce its cross-section. There are plans for additional improvements in this area, especially for the deck rails and masts. In January 2021 Saab and the Swedish Defense Materiel Administration (FMV) signed a contract for the product definition phase for the mid-life upgrade for the five Visby corvettes. The MLU will include the installation of surface-to-air missiles and the implementation of upgraded anti-ship missiles and anti-submarine torpedoes. The MLU aims to keep the Visby corvettes operationally relevant beyond 2040. |
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class images for more images go to the individual ship's page |
 K31 HSwMS Visby  K32 HSwMS Helsingborg  K33 HSwMS Härnösand  K34 HSwMS Nyköping  K35 HSwMS Karlstad ARMAMENT + DETAILS  Bofors Mk.3 57mm/L70 gun  Bofors Mk.3 57mm/L70 gun  Bofors Mk.3 57mm/L70 gun  firing an RBS 15 anti-ship missile (SSM)  launching canister for RBS 15 SSM  new Saab Torped 47 Lightweight Torpedo (SLWT)  new Saab Torped 47 Lightweight Torpedo (SLWT)  a Torped 45 lightweight torpedo was launched from the integrated 400mm launcher  400mm torpedo launcher for Torped 45 and Torped 47 lightweight torpedoes  a depth-charge was dropped  2 x Kamewa 125SII steerable Waterjets |
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seaforces.org
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Swedish
Navy start page
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