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 Sonar: Types 170B, 162 Combat system: SEWACO V
Armament	1× OTO Melara 76 mm gun 2× twin Simbad 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.

Operational history

In 1992, KRI Ki Hajar Dewantara, along with KRI Yos Sudarso and KRI Teluk Banten intercepted the Portuguese ship Lusitania Expresso in East Timor. Col. Widodo, deputy assistant of the Indonesian Navy´s Eastern Fleet, told Radio Republik Indonesia from aboard the Indonesian warship KRI Yos Sudarso that the ferry entered Indonesian waters at 5:28 a.m. local time on March 11, 1992. At 6:07, the Lusitania Expresso had traveled two to three nautical miles (3.7 to 5.6 km; 2.3 to 3.5 mi) into Indonesian territory and Captain Luis Dos Santos (Lusitania Expresso's captain) was ordered to leave immediately. Col. Widodo said the Portuguese ship captain obeyed the order and turned his ship around and headed back to sea.

Ships

Name	Pennant number	Namesake	Previously	Acquired	Commissioned	Status
KRI Ahmad Yani	351	Ahmad Yani, an army general killed in the 30 September Movement	Tjerk Hiddes	1986	1986	Active
KRI Slamet Riyadi	352	Slamet Riyadi, an army lieutenant colonel killed in Fort Victoria, Maluku	Van Speijk	1986	1986	Sunk as target
KRI Yos Sudarso	353	Yos Sudarso a navy commodore killed in the Battle of Arafura Sea	Van Galen	1987	1987	Active
KRI Oswald Siahaan	354	Oswald Siahaan, a lieutenant killed in at Sibolga Bay in 1948	Van Nes	1986	1988	Active
KRI Abdul Halim Perdanakusuma	355	Halim Perdanakusuma an air vice-marshal killed in 1947	Evertsen	1989	1989	Active
KRI Karel Satsuitubun	356	Karel Satsuit Tubun, a police officer killed in the 30 September Movement	Isaac Sweers	1990	1990	Active

Modernisation

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 PKR 10514); the first of which, Raden Eddy Martadinata (331), was commissioned on 7 April 2017.

See also

• List of active Indonesian Navy ships
• Equipment of the Indonesian Navy