OSLO, Norway, Nov. 23 (UPI) -- The Norwegian Defense Materiel Agency has awarded Kongsberg Defense with a $36 million contract to upgrade Fridtjof Nasen-class frigates.
The upgrades for the vessels will include the combat management and active sonar systems. The company has previously supplied anti-surface and anti-submarine warfare systems based on the integrated Aegis Combat System. Officials estimate the work will be complete after four years, and will effectively extend the service life for the ships.