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Visby Class Corvette

Defining stealth at sea

HMS Karlstad - a Visby Class Corvette

Visby - a true Stealth Combatant

Visby is a flexible surface combatant, designed for a wide range of roles: anti-surface warfare (ASuW), anti-submarine warfare (ASW), mine countermeasures (MCM), patrol and much more.

Gone are the days when the mere firepower of a ship was sufficient for its own protection. The concept today is action before - or even without - being detected.

Genuine Holistic Stealth - GHOST ®

The Visby class corvette is the first vessel in the world to have fully developed stealth technology, combined with high operational versatility. The outstanding stealth properties fundamentally change the ship's survivability and improve its mission effectiveness. Visby represents "stealth all the way" which we at Kockums define as: Genuine Holistic Stealth - GHOST®

Hull design - attention to every detail

Flat surfaces and concealed equipment reduce radar signature to a minimum. View larger image

Flat surfaces and concealed equipment.

The hull is designed on stealth principles with large flat angled surfaces. Every feature that need not necessarily be located outside the hull has been built in or concealed under specially designed hatches. The gas turbine exhausts have been concealed in hidden outlets close to the water surface at the stern of the vessel.

The vessel is built of sandwich-construction carbon fibre reinforced plastic (CFRP). The material provides high strength and rigidity, low weight, good shock resistance, low radar signature and low magnetic signature.

The material dramatically reduces the structural weight (typically 50% of a conventional steel hull). This results in a higher payload carrying capability, higher speed or longer range.

Propulsion - fast and silent

The Visby is equipped with a combined diesel or gas (CODOG) turbine arrangement for high speeds and two diesel engines for low-speed. The engines are connected to two gearboxes, driving two waterjet propulsors. The engines provide a maximum speed of 15 knots for long duration and 35 knots for short duration. The ship has bowthrusters for harbour manoeuvring.

The Visby class corvette at high speed. View larger image

The Visby class corvette at high speed.

Page updated Wednesday, February 03, 2010.