Sigma-class corvette
Sigma 9113-class corvette (KRI Diponegoro)
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| Class overview | |
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| Builders: | Schelde Naval Shipbuilding |
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| Subclasses: |
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| Built: | 2005-present |
| In commission: | 2007-present |
| Building: | 2 |
| Planned: | 11 |
| Completed: | 7 |
| Active: | 7 |
| Laid up: | 2 |
| General characteristics | |
| Type: | Corvette |
| Displacement: | 1,692 tons |
| Length: | 90.71 m (297 ft 7 in) |
| Beam: | 13.02 m (42 ft 9 in) |
| Draft: | 3.60 m (11 ft 10 in) |
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| Range: |
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| Complement: | 20, up to 80 |
| Sensors and processing systems: |
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| Electronic warfare & decoys: |
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| Armament: |
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| Aviation facilities: | landing pad, optional hangar |
The Sigma-class corvette is a Dutch-built family of modular naval vessels, of corvette size.
The basic design of the Sigma Patrol Series can vary as the hull segments are designed as components. Ships can vary in the number of hull segments and in the order in which they are placed. Sigma stands for Ship Integrated Geometrical Modularity Approach. The ship's main dimensions are named in the types itself, SIGMA 9113 stands for 91 metres (298 ft 7 in) long and with a beam of 13 metres (42 ft 8 in). Likewise, the SIGMA 10513, is 105 metres (344 ft 6 in) in length with a beam of 13 meters.
The design was derived from the earlier High Speed Displacement hull form by MARIN Teknikk AS in the 1970s.
The Indonesian variant is based on the Sigma 9113 design. Work on the first of the class, KRI Diponegoro, began with the first steel cutting conducted in October 2004. The ship was christened on 16 September 2006 and commissioned on 2 July 2007 by Admiral Slamet Soebijanto, Indonesian Navy Chief of Staff.
Options for 2 other units were exercised in January 2006 with the first steel cut commenced on 3 April 2006 in Damen's Schelde Naval Shipbuilding yard, Vlissingen-Oost yard and not in Surabaya stated earlier.
On 28 August 2007, Jane's Missiles and Rockets reported that Indonesia was having problems securing the export license for the MM-40 Exocet block II and are considering Chinese made C-802 anti-ship missiles as alternatives. However, the ships have already been delivered with the Exocet missiles.
On the 16 August 2010, Indonesia Defense Department, signed a deal with PT PAL Indonesia and Damen Schelde to build a 105-meter frigate in Indonesia based on Damen Schelde Sigma 10514 design. For the first ship, 5 modules for the ship will be built in Indonesia and the Dutch manufacturer Damen Schelde will build 2 modules while for the second ship the Indonesians will build 6 modules and Damen Schelde will build 1 module. The first hull will only be equipped with guns (without major weapons) and the second hull is complete with major weapons such as 76 mm main cannon, 12 MICA vertical launch air defence missile, MM-40 Exocet block III, Torpedo, and SMART-S MK2 radar system. Though the Indonesian Navy announced that it will build two destroyer escorts referring to the SIGMA 10514. On the Indo Defence 2012 exposition a model was revealed showing the phalanx and ASW mortar replaced by a single 35 mm Oerlikon Millennium Gun system, also the 76mm had a stealth cupola. Some reported that the VLS missiles will be Aster-15 instead of MICA, due to these changes the ships role also changed from ASW to AAW.
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