Built 2005-present Building 2 | In commission 2007-present | |
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Builders Schelde Naval Shipbuilding Operators Indonesian Navy (TNI-AL)
Royal Moroccan Navy Subclasses 9113 (Indonesian corvette variant)
9813 (Moroccan heavy corvette variant)
10513 (Moroccan light frigate variant)
10514 (Indonesian frigate variant) | ||
The Sigma-class corvette is a Dutch-built family of modular naval vessels, of corvette size.
Contents
Modular design
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.
Users
Under construction
Failed bids
Indonesian variants
SIGMA 9113
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.
SIGMA 10514
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 76mm Main Canon, 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.
On 1 February 2013 it was announced that a second unit will be built by Damen Schelde Naval Shipbuilding and PT PAL Surabaya, the second contract includes torpedo tubes, combat control room and a couple of surface weapons. As of December 2015, the first ship, KRI Raden Eddy Martadinata (331), was 85% complete and the ship was launched on 18 January 2016.
Moroccan variants
On 6 February 2008, Morocco signed a USD$1.2 billion contract with Schelde Naval Shipbuilding for two Light frigate SIGMA 9813 and one Light frigate SIGMA 10145 which are modified versions of the existing Sigma-class design.
A subsequent contract was signed on 1 April 2008 with Thales Nederland for the supply and installation of the command and control and sensor package for the ships. The package included TACTICOS combat management system, SMART-S Mk2 surveillance radar, LIROD Mk2 tracking radar, Thales KINGKLIP sonar system, IFF system, Integrated communication system comprising external communication system and FOCON internal communication system, two Target Designation Sights, VIGILE ESM system, SCORPION ECM system, and the integrated navigation system.
The first frigate for Morocco, Tarik ben Ziyad, was launched in July 2010, began sea trials on 6 May 2011 and was delivered on 12 September 2011. The second ship was launched on 2 February 2011, with sea trials planned for late in the year. The third ship was planned to be launched in September 2011.
Romanian variant
In November 2016 the Romanian Navy indicated that Damen Shipyard's Sigma Class design had been selected to supply 4 vessels, to be locally constructed at the Damen Shipyard in Galati. Romania will order 4 multi-role corvettes for a total of 1.6 billion euro's including training, spare parts and ammunition. The 1st ship is planned to be delivered within 2,5 years after contract signing.
Romanian navy has studied the SIGMA 9813 and SIGMA 10514 with the 10514 meeting most of the requirements. No official confirmation has been given on what variant of SIGMA will be ordered.
Ships of class
TNI-AL / Sigma 9113 design
TNI-AL / Sigma 10514 design
Moroccan Navy / Sigma 9813 & 10513 design
Note: 613 now shows on AIS as Sultan Moulay Ismail.
Sigma versions
There are three types of Sigma combatants
Simplified comparisons between the different Sigma models.
There are multiple new Sigma designs released in early 2015 of which little is known, these are the:
Sigma 8313 / Sigma 8011 / Sigma 7613 / Sigma 6610
They are likely to be part of the Compact SIGMA series, a new series small sized combatants with shorter range and up to 2 weeks mission endurance with the same combat systems as the larger Sigmas.