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Diponegoro class / Sigma class Corvette

Indonesia ordered four missile-equipped corvettes from the Schelde naval shipyard in the Netherlands in January 2004. In order to strengthen the combat fleet defences in all the waters of the Indonesian archipelago, the Indonesian navy added to its combat fleet by buying four corvettes. The corvettes with cruising capability, fast acceleration and various sophisticated combat and navigational equipment are currently being ordered by Indonesia from the Vlissingen, Netherlands-based Damen Schelde Naval Shipbuilding. The ships are equipped with an integrated combat communication system. With a displacement of 1,700 tons, the 90.71 meter long warship can reach a maximum speed of 28 knots and cruise over a distance of around 500 kilometers at 10 knots.

The four SIGMA-class corvettes for the Indonesian Navy (TNI-AL) are designed according to the SIGMA-approach from Schelde Naval Shipbuilding. This approach applies modular in many areas, which offers the user great flexibility at reduced costs. The corvettes are equipped with a comprehensive combat and communication suit fitted on a spacious platform accommodating 80 persons, a large helicopter deck and a twin-screw diesel propulsion. The superior propulsion and sea keeping capabilities make the SIGMA class Corvettes perfectly suited for maritime search and patrol operations in the Indonesian territorial waters. Basic functions are Naval Patrol EEZ, Deterrence, Search And Rescue and ASW.

A helicopter deck for helicopters with a maximum weight of 5 tons, with lashing points and refuelling system is provided. Heli operations can be performed at day and nightThe vessels are built according to Lloyds Register Class for unrestricted service and are enhanced by proven naval principles.

Indonesia placed the order for the four corvettes in 2005. Construction of the first two started in 2005, while construction of the other two was started in 2006. The first two corvettes were named KRI Diponegoro and KRI Hasanuddin. The first ship arrived in August 2007, the second early in 2008. The first and second Sigma-class corvettes were named respectively KRI Diponegoro and KRI Hasanuddin during the visit of Defense Minister Juwono Sudarsono and Naval Chief of Staff Admiral Slamet Soebijanto in the Netherlands on September 14-18, 2006. KRI Iskandar Muda, a Sigma-class Corvette III built in the Netherlands for the Indonesian Navy, sailed to Indonesia on 18 October 2008. The corvette was officially delivered to the Indonesian Navy at a ceremony at the Schelde shipbuilding yard in Vlissingen. The fourth ship arrived in mid-2009.

The corvette KRI Diponegoro-365, departed from Vlissingen in the Netherlands on 03 July 2007. The corvette is one of four Sigma-class corvettes that the Indonesian navy ordered from Schelde Naval Shipbuilding in the Netherlands. The corvette is to be used for patrol duties in Indonesian waters. Navy Chief of Staff Admiral Slamet Soebijanto and Dutch Navy Chief Admiral J.W. Kelder signed an agreement on the handing over of the corvette early July. Minister of Defence in Indonesia Juwono Sudarsono went to the Netherlands last September to take a look at the warships. The KRI Hasanuddin was to sail to Indonesia in December this year. The third, with the name KRI Sultan Iskandar Muda, was expected to be completed in September 2008. The fourth, KRI Frans Kaisiepo, would depart for Indonesia in March 2009. Commodore Sugeng Darmawan told that the Navy had decided to choose the corvettes because of their functional flexibility and the fact that they could be ordered in a relatively short period of time.

The Indonesian Navy deployed a "Sigma" class corvette to support its peace mission of the United Nations Interim Force in Lebanon (UNIFIL) in April 2010. The Indonesian warship, "KRI Frans Kasiepo-368", was officially inaugurated in February before joining the Maritime Task Force (MTF) in Lebanon.

Dimensions (m) 90.7 1oa x
13.02 x
3.60
Displacement (t)1700
Main machinery 2 x diesel engines
8910 kW max. power each
2 shafts with CPP
Passive roll stabilisation
Speed (knots)28
Range (nautical miles)3000 at 18 kt
Accommodation80
MissilesSSM Exocet
SAM Tetral
Guns76mm Super Rapid
2 x 20mm
Torpedoes 2 x B515 trainable launchers
Countermeasures2 x SKWS launchers
ESM/ECM
Combat data systems Tacticos
Weapon control systemsLIROD Mk2 FC Radar
RadarsMW08 3D Radar
SonarsKingklip hull-mounted sonar

#nameBuilderLaid
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LaunchCommDecomm
365DiponegoroSchelde24-03-200516-09-200602 Aug 2007
366HasanuddinSchelde24-03-200516-09-2006 24 Nov 2007
367Iskandar MudaSchelde08-05-200624-11-200718 Oct 2008
368Frans KasiepoSchelde08-05-200628-06-200807 Mar 2009



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