Ahmad Yani-class frigates

KRI Karel Satsuit Tubun
Class overview
Name:	Ahmad Yani class
Builders:	Nederlandsche Dok en Scheepsbouw Maatschappij Damen Schelde Naval Shipbuilding
Operators:	Indonesian Navy (TNI-AL)
Preceded by:	Martha Kristina Tiahahu-class frigate
Succeeded by:	Martadinata-class frigate
Built:	1963–1968
In service:	1986–present (Indonesian navy)
Completed:	6
Active:	6
General characteristics
Class and type:	Frigate
Displacement:	2,200 tons standard, 2,850 tons full load
Length:	113.4 m (372 ft)
Beam:	12.5 m (41 ft)
Draught:	5.8 m (19 ft)
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 kn (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 Sonar: Types 170B, 162 Combat system: SEWACO V
Armament:	1× OTO-Melara 76 mm gun 2× twin Simbad Launcher for Mistral SAMs 4× SS-N-26 SSM (On at least one ship) (Indonesian Navy) 4× C-802 SSM (On five ships) (Indonesian Navy) 2 × 3 – Mk 32 anti submarine torpedo tubes
Aircraft carried:	one 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 and were licence-built versions of the British Leander-class.

All six frigates have had their steam turbine power plants replaced with marine diesel engines.

The frigates of the Ahmad Yani-class are due to be replaced by the Martadinata-class frigates (Sigma 10514); the first of which, Raden Eddy Martadinata (332), was commissioned on 7 April 2017.

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