Ahmad Yani-class frigate

KRI Karel Satsuitubun
Class overview
Name	Ahmad Yani class
Builders	Nederlandsche Dok en Scheepsbouw Maatschappij Damen Schelde Naval Shipbuilding
Operators	Indonesian Navy
Preceded by	Martha Khristina Tiyahahu class
Succeeded by	Martadinata class
Subclasses	Van Speijk class
Built	1963–1968
In service	1986–present (Indonesian Navy)
Completed	6
Active	5
Retired	1
General characteristics
Type	Frigate
Displacement	2,200 tons standard, 2,850 tons full load
Length	113.4 m (372 ft 1 in)
Beam	12.5 m (41 ft 0 in)
Draught	5.8 m (19 ft 0 in)
Propulsion	As built 2 x geared steam turbines 22,370 kW (30,000 shp) 2 x shafts Rebuild Caterpillar diesels (5 ships) SEMT-Pielstick diesels (1 ship)
Speed	28.5 knots (52.8 km/h; 32.8 mph) With new diesels - estimated max. 24 kn (44 km/h; 28 mph)
Range	4,500 nmi (8,300 km; 5,200 mi) at 12 kn (22 km/h; 14 mph)
Complement	180
Sensors and processing systems	Radar: LW-03, DA-02, M45, M44[citation needed] Sonar: Types 170B, 162 Combat system: SEWACO V
Armament	1× OTO Melara 76 mm gun 2× twin Simbad[1] Launcher for Mistral SAMs (Originally equipped with Seacat) 4× SS-N-26 SSM (KRI Oswald Siahaan) 4× C-802 SSM (on five ships) (Originally equipped with Harpoon Block 1D) 2 × 3 – Mk 32 anti-submarine torpedo tubes
Aircraft carried	1x NBO-105C
Aviation facilities	Hangar

The Ahmad Yani class of six general-purpose frigates were acquired by the Indonesian Navy in the 1980s. They were originally built in the Netherlands for the Royal Netherlands Navy as the Van Speijk class which were licence-built versions of the British Leander class.