Fridtjof Nansen Class

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Fridtjof Nansen Class Frigate
FRIDTJOF NANSEN01.jpg
Fridtjof Nansen Class Frigate
Career Flag of Kalmar Union.png
Nationality: Skandinavia
Operated by: Kongelige Sjøforsvaret
Builder: Navantia
Aker Yards
Ordered: First of class: June 2000
Laid down: First of class: January 2002
Launched: First of class: February 2003
Commissioned: First of class: April 2004
Status: In Service
General characteristics
Displacement: 5,980 tons
Length: 144 m
Beam: 18.6 m
Draft: 7.7 m
Power: 105 MW
Propulsion: NAtech/Volvo COFCAG (multi-gas turbine and fuel cell propulsion system) with two two ASEA AZIPODs azimut thrusters
Speed: 31 knots
Maximum speed: 37 knots
Range: 6,300 nautical miles at 31 knots
Complement: 160 (34 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
1 × 32-cell Mk41 Vertical Launching System w/ 72 × RIM-162 ESSM
16 × Naval Strike Missile SSMs
4 × torpedo tubes for Torpedo 2000
Depth charges
1 × 57 mm BOFORS Mk.3
4 x 30 mm Kongsberg Sea Protector CIWS
2 x Long Range Acoustic Device
Aircraft carried: 1 x AS532 SC Cougar ASUW / ASW
1 UAV

The Fridtjof Nansen Class frigate are the main surface combatant ships of the Kongelige Sjøforsvaret. The ships are named after famous Norwegian explorers, with the lead ship of the class bearing the name of Fridtjof Nansen, the Norwegian scientist, explorer and humanitarian. 10 ships were ordered from Spanish shipbuilder Navantia and 10 more were ordered later to Aker Yards.

Background[edit | edit source]

At the end of the 90s the Sjøforsvaret was working on the design specifications of a multipurpose frigate to become the backbone of its future surface fleet. It was decided to modify an existing design in the market to save development costs and finally the project was awarded to the Spanish company Navantia, which at that time had already advanced the project of the Álvaro de Bazán frigates. At first, 5 units were ordered, which were extended to another 5 soon after.

In June 2008 FLOSK decided to order another 10 units to Aker Yards in Skandinavia.

Design[edit | edit source]

In the original design for the spanish firgates, 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 the backbone of the Sjøforsvaret Fleet. That's why FLOSK immediately began working on a series of proposals that ended up with changes in the following parts:

  • A displacement 700 tons higher
  • 10 more metres length
  • 2 more metres beam
  • A brand new power system with NAtech-Volvo Aero Hybrid Multi-Gas Power Plant
  • A new total power of 105 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.

Fridtjof Nansen Class was the first one to integrate this propulsion system that would become the main system for all the new and retrofitted ships of the Sjøforsvaret.

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]

The ships have a fligh deck for:

List of ships[edit | edit source]

The ships are named after famous Norwegian explorers.

# Name Ordered Launched Commissioned
F-310 KSS Fridtjof Nansen June 2000 February 2003 April 2004
F-311 KSS Roal Amudsen June 2000 February 2003 April 2004
F-312 KSS Otto Sverdrup June 2000 October 2003 December 2004
F-313 KSS Helge Instad June 2000 October 2003 December 2004
F-314 KSS Thor Heyerdahl June 2000 January 2004 March 2005
F-315 KSS Erling Kagee November 2001 June 2005 August 2006
F-316 KSS Oscar Wisting November 2001 June 2005 August 2006
F-317 KSS Karl Julius Evensen November 2001 March 2006 February 2007
F-318 KSS Jørgen Stubberud November 2001 September 2006 September 2007
F-319 KSS Samuel Balto November 2001 September 2006 September 2007
F-320 KSS Tore Gjelsvik June 2008 January 2010 July 2011
F-321 KSS Peder Olsen Walløe June 2008 January 2010 July 2011
F-322 KSS Kristian Birkeland June 2008 August 2010 December 2011
F-323 KSS Kristian Prestrud June 2008 August 2010 December 2011
F-324 KSS Rene Malterud June 2008 February 2011 March 2012
F-325 KSS Gunnar Horn June 2008 February 2011 March 2012
F-326 KSS Peter Tessen June 2008 January 2012 February 2013
F-327 KSS Paul Knutsen June 2008 January 2012 February 2013
F-328 KSS Gunnar Isachsen June 2008 November 2012 December 2013
F-329 KSS Hjalmar Riiser-Larsen June 2008 January 2013 March 2014
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