Oslo class frigates are a Norwegian frigate design, based on the U.S. Navy Dealy class destroyer escorts.

All ships were built at the Navy Main Yard at Horten, Norway. The construction of the vessels was part of the Navy rebuilding program, approved by the government in 1960. They were built between 1964 and 1966. Half of the project was funded by the United States, as part of the Marshall Plan.

Vessels

Five frigates of this class were built. All ships were modernized in the late 1980s:

• Oslo (F300)
• Bergen (F301)
• Trondheim (F302)
• Stavanger (F303)
• Narvik (F304)

The lead ship, Oslo, ran aground at Marsteinen on January 24, 1994 and sank. Stavanger was taken out of service in 1998. It was later used for target practice and sunk in 2001. The other three (F301, F302, F304) remain in service today.

Specifications

• Displacement:
  • Standard: 1,650 tons
  • Full load: 1,950 tons
• Dimensions
  • Length: 96 m
  • Width: 11.2 m
• Crew: 125
• Speed: 25 knots+
• Range: 4,500 miles, at 15 knots
• Propulsion: twin steam turbines; 20,000 hp.
• Armament:
  • 8-cell Raytheon RIM-7M Sea Sparrow Mk 29 SAM system
  • Twin US 3' cannon
  • 40mm/70 Bofors anti-aircraft guns
  • 2 20mm Rheinmetal anti-aircraft guns
  • 2 triple 324mm US Mk 32 torpedoes
  • Kongsberg Terne III 6 anti-submarine rockets
• Electronics:
  • Siemens/Plessey AWS-9 radar
  • Thomson Sintra/Simrad TSM 2633 combined hull and VDS active sonar, medium frequency
  • Terne III active sonar, high frequency