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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

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

References

1. "Van Speijk Class: "Benteng Laut Nusantara" – Tiga Dasawarsa Flagship Armada Eskorta TNI AL". indomiliter.com (in Indonesian). 29 September 2014. Retrieved 18 April 2021.
2. "Portuguese Ship 'Lusitania Expresso' Fails to Reach East Timor". ucanews.com. 11 March 1992. Retrieved 7 February 2021.
3. Mendrofa, Damai (17 August 2017). "Letnan Oswald Siahaan Gugur". www.kedaipena.com (in Malay). Kedai Berita Nusantara. Retrieved 18 August 2019.
4. "Ahmad Yani class". www.helis.com. Helicopter History Site. Retrieved 8 April 2017.
5. Waters, Conrad (2015). Seaforth World Naval Review 2016. Seaforth Publishing. p. 44. ISBN 978-1848323094.
6. Rahmat, Ridzwan. "Indonesia commissions first Martadinata-class guided-missile frigate". www.janes.com. IHS Jane's 360. Retrieved 10 April 2017.

v t e Leander-class frigates
Royal Navy	Achilles Ajax Andromeda Apollo Arethusa Ariadne Argonaut Aurora Bacchante Charybdis Cleopatra Danae Dido Diomede Euryalus Galatea Hermione Juno Jupiter Leander Minerva Naiad Penelope Phoebe Scylla Sirius
Royal Australian Navy Part of River class	Swan Torrens
Chilean Navy Condell class	Almirante Condell Almirante Lynch Ministro Zenteno (ex-Achilles) General Baquedano (ex-Ariadne)
Indian Navy Nilgiri class	Nilgiri Himgiri Udaygiri Dunagiri Taragiri Vindhyagiri Krishna (ex-Andromeda)
Royal Netherlands Navy Van Speijk class	Van Speijk Van Galen Tjerk Hiddes Van Nes Isaac Sweers Evertsen
Royal New Zealand Navy	Canterbury Southland (ex-Dido) Waikato Wellington (ex-Bacchante)
Other operators  Ecuadorian Navy Eloy Alfaro (ex-Penelope) Eloy Alfaro (ex-Almirante Condell) Morán Valverde (ex-Danae) Morán Valverde (ex-Almirante Lynch)  Indonesian Navy Ahmad Yani class Ahmad Yani (ex-Tjerk Hiddes) Slamet Riyadi (ex-Van Speijk) Yos Sudarso (ex-Van Galen) Oswald Siahaan (ex-Van Nes) Abdul Halim Perdanakusuma (ex-Evertsen) Karel Satsuitubun (ex-Isaac Sweers)  Pakistan Navy Zulfiqar (ex-Apollo) Shamsher (ex-Diomede)
Preceded by: Rothesay class Followed by: Blackwood class
List of frigates of the Royal Navy List of frigates of the Royal Australian Navy List of frigates of the Chilean Navy List of frigates of the Indian Navy List of frigates of the Royal Netherlands Navy List of frigates of the Royal New Zealand Navy

v t e Indonesian Navy active ship classes
submarines	Cakra class Nagapasa class
frigates	Ahmad Yani class Martadinata class
corvettes	Fatahillah class Kapitan Pattimura class Diponegoro class Bung Tomo class Bung Karno class
fast attack crafts	Mandau class Clurit class Sampari class Klewang class
patrol boats	FPB 57 design (Nav I, Nav II, Nav III, Nav IV, Nav V) Sibarau class Pulau Rote class Badau class Pari class Dorang class Krait class Cucut class
minesweepers	Pulau Rengat class Pulau Rote class Pulau Fani class
landing platform dock	Makassar class
tank landing ships	Teluk Amboina Teluk Semangka class Teluk Gilimanuk class Teluk Bintuni class
landing craft utility	Kupang class
hospital ships	dr. Soeharso Sudirohusodo class
hydrographic survey vessels	Dewa Kembar Rigel class Polux
command ship	Multatuli
auxiliary ships	Talaud class Tanjung Kambani Karang Pilang class Arun Sungai Gerong Tarakan class
training ships	Dewaruci Bima Suci Arung Samudera Kadet class
S: single ship

• Frigates of the Indonesian Navy
• Ahmad Yani-class frigates
• Frigate classes