Kortenaer-class frigate

	Kortenaer
Class overview
Name	Kortenaer class
Operators	Royal Netherlands Navy; Hellenic Navy; United Arab Emirates Navy;
Preceded by	Van Speijk class
Succeeded by	Karel Doorman class
Subclasses	Jacob van Heemskerck class; Elli class;
Built	1975–1982
In commission	1978–present
Planned	12
Completed	12
Active	10
Laid up	1
Retired	1
General characteristics as built
Type	Frigate
Displacement	3,100 t (3,050 long tons) standard; 3,690 t (3,630 long tons) full load;
Length	130.5 m (428 ft 2 in)
Beam	14.6 m (47 ft 11 in)
Draught	4.3 m (14 ft 1 in)
Propulsion	Combined gas or gas (COGOG) system:; 2 × Rolls-Royce Tyne RM1C gas turbines, 4,900 shp (3,700 kW) each; 2 × Rolls-Royce Olympus TM3B gas turbines, 25,700 shp (19,200 kW) each (boost); 2 shafts;
Speed	20 knots (37 km/h; 23 mph) cruise; 30 knots (56 km/h; 35 mph) maximum;
Endurance	4,700 nautical miles at 16 knots (8,700 km; 5,400 mi at 30 km/h; 18 mph)
Complement	176–196
Armament	1 × OTO-Melara Compatto 76 mm/62 cal. gun; 1 × Bofors 40 mm gun; 2 × twin Mk46 torpedo tubes; 2 × quad RGM-84 Harpoon anti-ship missile launchers; 1 × 8-cell Sea Sparrow anti-aircraft missile launchers;
Aircraft carried	2 × Sea Lynx helicopters

The Kortenaer class was a class of anti-submarine frigates of the Royal Netherlands Navy. Like other frigate types of the 1970s and 1980s, they featured a COGOG (combined gas or gas) propulsion system with separate cruise and sprint gas turbines. Ten were built by De Schelde in Vlissingen and two by Wilton-Fijenoord in Schiedam between 1978 and 1982. Only ten served with the Royal Netherlands Navy: two were sold to Greece's Navy while still under construction and replaced by two Jacob van Heemskerck-class frigates which were an air defence variant of the Kortenaer class. The Greek frigates were renamed the Elli class. After service with the Dutch ended, eight of the frigates were sold to Greece in 1992 and the remaining two to the United Arab Emirates. Three of the ships have since been retired from active military service with one converted into the superyacht Yas.

Class overview
Kortenaer
Name	Kortenaer class
Operators	Royal Netherlands Navy Hellenic Navy United Arab Emirates Navy
Preceded by	Van Speijk class
Succeeded by	Karel Doorman class
Subclasses	Jacob van Heemskerck class Elli class
Built	1975–1982
In commission	1978–present
Planned	12
Completed	12
Active	10
Laid up	1
Retired	1
General characteristics as built
Type	Frigate
Displacement	3,100 t (3,050 long tons) standard 3,690 t (3,630 long tons) full load
Length	130.5 m (428 ft 2 in)
Beam	14.6 m (47 ft 11 in)
Draught	4.3 m (14 ft 1 in)
Propulsion	Combined gas or gas (COGOG) system: 2 × Rolls-Royce Tyne RM1C gas turbines, 4,900 shp (3,700 kW) each 2 × Rolls-Royce Olympus TM3B gas turbines, 25,700 shp (19,200 kW) each (boost) 2 shafts
Speed	20 knots (37 km/h; 23 mph) cruise 30 knots (56 km/h; 35 mph) maximum
Endurance	4,700 nautical miles at 16 knots (8,700 km; 5,400 mi at 30 km/h; 18 mph)
Complement	176–196
Armament	1 × OTO-Melara Compatto 76 mm/62 cal. gun 1 × Bofors 40 mm gun 2 × twin Mk46 torpedo tubes 2 × quad RGM-84 Harpoon anti-ship missile launchers 1 × 8-cell Sea Sparrow anti-aircraft missile launchers
Aircraft carried	2 × Sea Lynx helicopters