Numedalslagen Class

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Numedalslagen Clas Landing Platform Dock
Numedalslagen01.jpg
Numedalslagen Clas Landing Platform Dock
Career Flag of Kalmar Union.png
Nationality: Skandinavia
Operated by: Sjøforsvaret
Builder: Navantia
Aker Yards
Ordered: First of class: April 2002
Launched: First of class: December 2003
Commissioned: First of class: September 2004
Status: In Service
General characteristics
Displacement: 16,900 tons
Length: 177 m
Beam: 31 m
Draft: 6 m
Power: 60 MW
Propulsion: NAtech&Volvo Aero Hybrid Multi-Gas Power Plant with two pods
Speed: 29 knots
Maximum speed: 35 knots
Range: 9,300 nautical miles at 29 knots
Complement: 180 (48 officers)
Armament: Sensors
1 x Saab 9LV CMS Combat Management System
1 x Saab 9LV FCS Fire Control System
2 x Saab EOS 500 Electro Optical Fire Control
2 x TERMA SCANTER 4100 Surveillance Radar
1 x Kongsberg C-Scope Sonar System
Electronic warfare
1 x Saab SME-200 Tactical EMS / ELINT
1 x Saab NLWS Naval Laser Warning System
Decoys
1 x TERMA DL-12T decoy launcher
1 x TERMA Loki torpedo countermeasure
Armament
4 x 30 mm Kongsberg Sea Protector CIWS
2 x Long Range Acoustic Device
Aircraft carried: Up to 5 heavy helicopters
Up to 8 medium helicopters

The Numedalslagen Class Landing Platform Dock are used as the main projection ships of the Sjøforsvaret.

Background[edit | edit source]

In april 2002 FLOSK ordered to the Spanish shipyard Navantia the construction of 4 Numedalslagen Class Landing Platform Docks (LPD). The original design was based on Navantia Galicia Class for the Spanish Navy. Later in 2008 FLOSK ordered a new batch of 4 ships that were built at Aker Yards.

Design[edit | edit source]

In the original design of the Spanish Navy, the operational needs of the new Sjøforsvaret had not been taken into account. The original platform was a good starting point, but reforms were needed in her original design so that the ship could become a projection platform for the Forsvaret. That's why FLOSK immediately began working on a series of proposals that ended up with changes in the following parts:

  • A displacement 3000 tons higher
  • 17 more metres length
  • 4 more metres beam
  • A brand new power system with NAtech&Volvo Aero Hybrid Multi-Gas Power Plant
  • A new total power of 60 MW
  • A brand new fully electrical propulsion system with 2 ASEA AZIPODs azimut thrusters mounted externally to the main hull
  • Changes in all electronic systems to fully compatibility with new national standards
  • A new weapon system in accordance with new operational requirements

Power generation & propulsion[edit | edit source]

The power plant of the ship has been completely redesigned to suit the needs and requirements of the Sjøforsvaret and the new systems and elements of the ship. FLOSK chose to equip the ship with a mixed multi-gas turbine and fuel cell propulsion system (COFCAG) developed jointly by NAtech and Volvo Aero. Main fuel for which the system has been designed is hydrogen, but the system can also work with natural gas, methane and other gases, although with a lower energy efficiency. At low speed and during maneuvers the system uses the power delivered by the fuel cells, using the gas turbine system to achieve higher speeds. In addition, the system reuses the exhaust gases to supercharge the turbine and for the ship's heating systems, which considerably reduces the ship's thermal footprint. Power plant of the ship was designed taking into account the current needs of energy for propulsion and other systems on board, so it was possible to assume an increase in power required if new equipment or systems were installed in the future.

The propulsion system is fully electrical with four AZIPODs (ASEA azimut thrusters) mounted externally to the main hull. The electricity for the motors is supplied by the power system.

Electronic systems[edit | edit source]

One of the main design premises was the need to mount Skandinavian made electronic systems in order to full integration with other Forsvaret systems and satellite net.

Sensors

  • 1 x Saab 9LV CMS Combat Management System
  • 1 x Saab 9LV FCS Fire Control System
  • 1 x Saab EOS 500 Electro Optical Fire Control
  • 1 x TERMA SCANTER 4100 Surveillance Radar
     
  • 1 x Kongsberg C-Scope Sonar System

     

Electronic warfare

  • 1 x Saab SME-200 Tactical EMS / ELINT
  • 1 x Saab NLWS Naval Laser Warning System
     

Decoys

  • 1 x TERMA DL-12T decoy launcher
  • 1 x TERMA Loki torpedo countermeasure

Armament[edit | edit source]

The weapons system of the class are:

Air wing[edit | edit source]

A helicopter flight deck (70m x 28m) is installed at the stern of the ship. The ship supports:

  • Up to 5 heavy helicopters
  • Up to 8 medium helicopters

List of ships[edit | edit source]

The ships are named after populations on the Numedalslagen river valley.

# Name Ordered Launched Commissioned
LPD-51 KSS Hvittingfoss April 2002 December 2003 September 2004
LPD-52 KSS Kongsber April 2002 March 2004 April 2005
LPD-53 KSS Kvelde April 2002 March 2004 April 2005
LPD-54 KSS Lardal April 2002 June 2004 July 2005
LPD-55 KSS Larvik November 2008 February 2010 June 2011
LPD-56 KSS Rødberg November 2008 February 2010 September 2011
LPD-57 KSS Rollak November 2008 April 2011 October 2012
LPD-58 KSS Veggli November 2008 May 2011 December 2012