The Norwegian Fridtjof Nansen class frigates have a very advanced weɑρos and sensors

The Fridtjof Nansen is a Norwegian class of frigates, based on the Spanish Alvaro de Bazan class. It was ordered to replace the ageing Oslo class frigates. A total of five ships were built in Spain by Bazan shipyard for the Norwegian Navy. All of these frigates are named after the famous Norwegian explorers. The first warship was commissioned in 2006. These frigates form the core of the Norwegian Navy. In 2018 one of the frigates, the Helge Ingstad sunk after colission.

These frigates were originally planned to be focused on anti-submarine ωɑɾʄɑɾε, as well as the previous Oslo class. However eventually the Fridtjof Nansen class frigates were completed as multi-role warships, that have anti-submarine, anti-ship, land attack and air defense capabilities. A number of design features were incorporated in order to reduce the radar cross section of these frigates, and thus increase their survivability. However the Fridtjof Nansen class ships are not true stealth vessels.

These Norwegian frigates have very advanced ωεɑρσռs and sensors. The ships’ ωεɑρσռs feature the Lockheed Martin Naval Electronics AN/SPY-1F AEGIS radar. It is a smaller and less capable version of the AN/SPY-1D radar, used on the Spanish Alvaro de Bazan class frigates, American Arleigh Burke class destroyers, and some other warships. The multi-function phased array radar can detect air targets at a range of around 160 km and track hundreds of targets simultaneously. The system controls the detection and engagement of hostile air, surface and submarine threats.

There is an 8-cell Mk.41 Vertical Launch Systems (VLS) for RIM-162 Evolved Sea Sparrow Missiles (ESSM). These air defense missiles have a range of 50 km. The VLS holds 32 missiles. The second similar VLS can be fitted for a total capacity of 64 missiles. However these Norwegian warships do not carry any long-ranged surface-to-air missiles. Anti-ship and land attack capability is provided by eight Kongsberg Naval Strike Missles (NSMs). These cruise missiles have a range of over 185 km and carry a 125 kg warhead. There is a single OTO Melara 76 mm Super Rapid dual-purpose naval gun. It can engage both surface and air targets. Fridtjof Nansen class can be equipped with a more powerful Otobreda 127 mm gun, in place of the 76 mm gun.

These Norwegian ships have got a hull-mounted sonar, as well as towed sonar for detection of hostile submarines. There are two dual 324 mm torpedo tubes for Sting Ray torpedoes, that provide anti-submarine capability. The Fridtjof Nansen class frigate can accommodate a single NH 90 helicopter, which is used for remote anti-submarine and anti-ship roles. Norwegian Navy ordered 6 of these helicopters to operate on their frigates.

These Norwegian warships have a Combined Diesel and Gas (CODAG) propulsion. It uses two Bazan Bravo 12V diesel engines developing 6 000 shp each. These are used for economical cruising. There is also a single General Electric LM2500 gas turbine, developing 25 700 shp. It is used for high speed cruise. The power is delivered to two shafts. Maximum speed of the Fridtjof Nansen class is at least 26 knots (48 km/h). Range is 8 300 km (4 500 nautical miles) at 16 knots (30 km/h). The Fridtjof Nansen class frigates are operated by a crew of 120 men. These frigates can additionally accommodate 26 passengers.