Sigma-class design

Last updated
Kri-diponegoro-1600-1200.jpg
SIGMA 9113 corvette, KRI Diponegoro (365)
Class overview
Builders
Operators
Subclasses
  • 9113 (Indonesian corvette variant)
  • 9813 (Moroccan heavy corvette variant)
  • 10513 (Moroccan light frigate variant)
  • 10514 PKR (Indonesian frigate variant)
  • 10514 POLA (Mexican Long Range OPV Variant)
Built2005–present
In commission2007–present
Planned18
Completed10
Active10
Laid up0
General characteristics (Corvette 9113)
TypeMulti-purpose corvette / frigate
Displacement1,692 tons
Length90.71 m (297 ft 7 in)
Beam13.02 m (42 ft 9 in)
Draft3.60 m (11 ft 10 in)
Propulsion
  • 2 × SEMT Pielstick 20PA6B STC rated at 8910 kW each driving a lightweight Geislinger coupling combination BE 72/20/125N + BF 110/50/2H (steel – composite coupling combination)
  • 4 × Caterpillar 3406C TA generator rated at 350 kW each
  • 1 × Caterpillar 3304B emergency generator rated at 105 kW
  • 2 × shaft with Rolls-Royce Kamewa 5 bladed controllable pitch propeller
  • 2 × Renk ASL94 single step reduction gear [1] with passive roll stabilization
Speed
  • Maximum: 28 knots (52 km/h; 32 mph)
  • Cruising: 18 knots (33 km/h; 21 mph)
  • Economy: 14 knots (26 km/h; 16 mph)
Range
  • Cruising speed at 18 kn (33 km/h; 21 mph): 3,600 nmi (6,700 km; 4,100 mi)
  • Economy speed at 14 kn (26 km/h; 16 mph): 4,800 nmi (8,900 km; 5,500 mi)
Complement20, up to 80
Sensors and
processing systems
  • Combat System: Thales Group Tacticos [2] with 4 × Multifunction Operator Console Mk 3 2H
  • Search radar: MW08 3D multibeam surveillance radar
  • IFF: Thales TSB 2525 Mk XA (integrated with MW08)
  • Navigation radar: Sperry Marine BridgeMasterE ARPA radar
  • Fire control radar : Lirod Mk 2 tracking radar
  • Data Link: LINK Y Mk 2 datalink system
  • Sonar: Thales UMS 4132 Kingklip medium frequency active/passive ASW hull mounted sonar
  • Internal Communications: Thales Communication's Fibre Optical COmmunications Network (Focon) or EID's ICCS where on-board users have access to internal and/or external communication channels and integrated remote control of communications equipment
  • Satellite Comms: Nera F series
  • Navigation System: Raytheon Anschutz integrated navigation
  • Integrated Platform Management System: Imtech UniMACs 3000 Integrated Bridge System [3]
Electronic warfare
& decoys
  • ESM: Thales VIGILE 100
  • ECM: Racal Scorpion 2L
  • Decoy: Terma SKWS, DLT-12T 130mm decoy launchers, port, starboard
Armament
Aviation facilitiesLanding pad, optional hangar

The SIGMA class is a Dutch-built family of modular naval vessels, of either corvette or frigate size, designed by Damen Group.

Contents

SIGMA stands for Ship Integrated Geometrical Modularity Approach. [4] 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. The ship's dimensions of length and beam lead to the individual SIGMA type names: the SIGMA 9113 is 91 m (298 ft 7 in) long with a beam of 13 m (42 ft 8 in), the SIGMA 10513 is 105 m (344 ft 6 in) in length again with a beam of 13 m (42 ft 8 in)

The design was derived from the earlier High Speed Displacement hull form by Marin Teknikk AS in the 1970s.[ citation needed ]

Versions

There are three types of Sigma combatants

Simplified comparisons between the different Sigma models.

Comparisons between the different SIGMA models
Compact SIGMA 7310 [5] SIGMA 9113 [6] SIGMA 9813 [7] SIGMA 9814 [8] [9] SIGMA 10513 [10] SIGMA PKR 10514 [11] [12] SIGMA 10514 POLASIGMA PES 10714CO [13] [14]
User–Flag of Indonesia.svg  Indonesian Navy Naval Ensign of Morocco.svg  Royal Moroccan Navy Ensign of Vietnam People's Navy.svg
Vietnam People's Navy 		Naval Ensign of Morocco.svg  Royal Moroccan Navy Flag of Indonesia.svg  Indonesian Navy Flag of Mexico.svg  Mexican Navy Naval Ensign of Colombia.svg  Colombian National Navy
TypeFast attack corvetteCorvetteFrigateFrigateFrigateFrigateFrigate (Long Range Patrol Vessel)Frigate
Length74.2 meters90.01 meters97.91 meters99.91 meters105.11 meters105.11 meters107.5 meters107.5 meters
Beam10.00 meters13.02 meters13.02 meters14.02 meters13.02 meters14.02 meters14.02 meters14.02 meters
Draft3.10 meters3.60 meters3.75 meters3.75 meters3.75 meters3.75 meters3.75 meters3.93 meters
Displacement900 tons1,692 tons2,075 tons2,150 tons2,335 tons2,946 tons2,575 tons2,808 tons
Main machinery4x 3.900  kW2 x 8.910 kW2 x 8.910 kWtbd2 x 8.910 kW2 x 10.000 kW2 x 13.410 kW2 x 10.000 kW
Speed (cruising)18 knots18 knots18 knotstbd18 knots18 knots18 knots14 knots
Speed (maximum)34 knots28 knots28 knotstbd28 knots28 knots28 knots26 knots
Endurance2,000  nmi3,600 nmi4,000 nmitbd4,000 nmi5,000 nmi5,000 nmi+8,200 nmi
Primary sensorsThales NS-100Thales MW08

(Thales NS50)

Thales SMART-S MK2Thales SMART-S MK2Thales SMART-S MK2Thales SMART-S MK2Thales SMART-S MK2SAAB SEA GIRAFFE 4A
Complement508091103110122122125
Helicopter
capabilities		nonedeck onlydeck and hangar
(9 ton)		deck and hangardeck and hangar
(9 ton)		deck and hangar
(10 ton)		deck and hangar
(10 ton)		deck and hangar
(10 ton)
StatusDesign conceptOperationalOperationalCancelled [15] OperationalOperationalOperationalUnder development

There are multiple new SIGMA designs released in early 2015 these are the:

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 version. [16]

During DIMDEX 2024 Damen presented a Batch 2 version of the Sigma 10514 POLA which has a length up to 130 meters, a width between 14 and 17 meters and a draft of 3.9 meters. [17]

Users

Under construction

Under development

Potential operators

Failed bids

Indonesian Navy variants

Indonesian Navy SIGMA 9113 corvette, KRI Sultan Hasanuddin (366). Hasanuddin-2.jpg
Indonesian Navy SIGMA 9113 corvette, KRI Sultan Hasanuddin (366).

SIGMA 9113

The Indonesian variant is based on the SIGMA 9113 design. [42] Work on the first of the class, KRI Diponegoro (365), 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. [43]

Options for two other units were exercised in January 2006 with the first steel cut commenced on 3 April 2006 [44] in Damen's Schelde Naval Shipbuilding yard, Vlissingen-Oost yard and not in Surabaya as stated earlier.

On 28 August 2007, Jane's Missiles and Rockets reported [45] that Indonesia was having problems securing the export license for the MM40 Exocet block II and was considering Chinese made C-802 anti-ship missiles as alternatives. However, the ships have already been delivered with the Exocet missiles.

In 2018 Thales has upgraded the Indonesian Navy's Diponegoro-class corvette through the installation and refurbishment of the Kingklip hull-mounted sonar system. [46]

In 2019 the Diponegoro-class corvettes were upgraded with MM40 Exocet block III missile. [47]

On 31 August 2021, Terma announced that they have been awarded a contract for the upgrade of existing C-Guard systems with Anti-Submarine Warfare (ASW) capabilities for the Sigma-Class Corvettes of the Indonesian Navy. This C-Guard ASW upgrade program is a follow-on from the previous ASW upgrade contract awarded in 2019 for the same class of ships. [48]

On 4 November 2022, Thales has signed a contract with PT. Len to undertake the refurbishment of the integrated mission systems for Diponegoro-class ships. [49] The corvettes will be updated with Thales TACTICOS Baseline 2 combat management system (CMS) and the Naval Smarter (NS) NS50 radar system. [50]

Indonesian Navy SIGMA 10514 frigate, KRI I Gusti Ngurah Rai (332) arriving at Pearl Harbor to participate in RIMPAC 2022. Indonesia frigate KRI I Gusti Ngurah Rai (332) arriving at Pearl Harbor to participate in RIMPAC 2022.jpg
Indonesian Navy SIGMA 10514 frigate, KRI I Gusti Ngurah Rai (332) arriving at Pearl Harbor to participate in RIMPAC 2022.

SIGMA 10514

On the 16 August 2010, Indonesian Defense Ministry, signed a deal [51] [52] 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, five 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 six modules and Damen Schelde will build one module.

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.

They were built without several of their main system and equipment, namely VL-MICA, MM40 Exocet block III, Rheinmetall Millennium CIWS, Electronic warfare system and were planned to be installed later on (FFBNW). [53]

As of December 2015, the first ship, KRI Raden Eddy Martadinata (331), was 85% complete and the ship was launched on 18 January 2016. [54] [55] [56] On 7 April 2017 the first ship, KRI Raden Eddy Martadinata (331), was commissioned at Tanjung Priok. [57] The second ship, KRI I Gusti Ngurah Rai (332), was commissioned on 10 January 2018. [58]

The class finally received their full complement of FFBNW system and equipment in December 2019 for KRI Raden Eddy Martadinata (331) [59] and March 2020 for KRI I Gusti Ngurah Rai (332). [60]

Moroccan Navy variants

Royal Moroccan Navy SIGMA 10513 frigate, Tarik Ben Ziyad (613). Tarik Ben Ziad 06.jpg
Royal Moroccan Navy SIGMA 10513 frigate, Tarik Ben Ziyad (613).

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 10513, which are modified versions of the existing SIGMA-class design. [61]

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. [62]

The first frigate for Morocco, Tarik ben Ziyad, was launched in July 2010, [63] began sea trials on 6 May 2011 [64] and was delivered on 12 September 2011. [65] The second ship was launched on 2 February 2011, [63] with sea trials planned for late in the year. [64] The third ship was planned to be launched in September 2011. [64]

Mexican Navy variant

Mexican Navy SIGMA 10514 POLA frigate, ARM Benito Juarez (F 101) departs Pearl Harbor to begin the at-sea phase of Rim of the Pacific (RIMPAC) 2022, July 12. ARM Benito Juarez (1).jpg
Mexican Navy SIGMA 10514 POLA frigate, ARM Benito Juárez (F 101) departs Pearl Harbor to begin the at-sea phase of Rim of the Pacific (RIMPAC) 2022, July 12.

On 18 August 2017, Damen announced the keel laying for one SIGMA 10514 Long Range Ocean Patrol Vessel (SIGMA 10514 LROPV/ SIGMA 10514 POLA) at Damen Schelde Naval Shipyard in Vlissingen for the Mexican Navy. The vessel was constructed modularly in six modules, two modules were constructed in Vlissingen and the other four modules in Mexico.

According to the Defense Security Cooperation Agency Major Arms Sale notification on 5 January 2018, the primary weapon systems for the SIGMA class will include RGM-84L Harpoon Block II, RIM-162 ESSM [66] with eight cell MK 56 VLS launcher, MK 54 Mod 0 lightweight torpedoes with two MK 32 Surface Vessel Torpedo Tubes (SVTT) triple tube launchers, Block II Rolling Airframe Missile (RAM) missiles and Bofors 57 mm gun. [67]

In April 2018 Damen Group contracted Spanish defense technology company Indra to equip the Mexican Navy's new long-range offshore patrol vessel (POLA) with its RIGEL electronic defense system. [68]

Ships of the class

NamePennantBuilderLaid downLaunchedCommissionedNotes
Flag of Indonesia.svg  Indonesian Navy
SIGMA 9113 design
KRI Diponegoro 365 Damen, Vlissingen 24 March 200516 September 20065 July 2007 Diponegoro, a National Hero from Central Java.
KRI Sultan Hasanuddin 36624 March 200516 September 200624 November 2007 Sultan Hasanuddin, a National Hero from South Sulawesi.
KRI Sultan Iskandar Muda 3678 May 200624 November 200718 October 2008 Sultan Iskandar Muda, a National Hero from Aceh.
KRI Frans Kaisiepo 3688 May 200628 June 20087 March 2009 Frans Kaisiepo, a National Hero from Papua and the fourth Governor of Papua province.
SIGMA 10514 design
KRI Raden Eddy Martadinata 331Damen, Vlissingen
PAL Indonesia, Surabaya 		16 April 201418 January 20167 April 2017Named after Raden Eddy Martadinata, a national hero from Bandung and one of the founders of the Indonesian Navy.
KRI I Gusti Ngurah Rai 33218 January 201629 September 201610 January 2018Named after I Gusti Ngurah Rai, a national hero from Bali Island and leader of the Puputan War against the Dutch colonialist government.
Naval Ensign of Morocco.svg  Royal Moroccan Navy
SIGMA 10513 design
Tarik Ben Ziyad 613Damen, VlissingenApril 200812 July 2010 [69] 23 December 2011Now shows on AIS as Sultan Moulay Ismail.[ citation needed ]
SIGMA 9813 design
Sultan Moulay Ismail 614Damen, VlissingenMarch 20092 February 2011 [70] 10 March 2012 [71]
Allal Ben Abdellah 615September 2009October 20118 September 2012 [72]
Flag of Mexico.svg  Mexican Navy
SIGMA 10514 LROPV/POLA design
ARM Benito Juárez 101Damen, Vlissingen
ASTIMAR 20, Salina Cruz 		17 August 2017 [73] 23 November 2018 [74] 10 February 2020 [75] ARM Benito Juárez (F 101) was formally named ARM Reformador (P 101) being renamed in March 2020. [76]

See also

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KRI <i>Frans Kaisiepo</i> Diponegoro-class corvette of the Indonesian Navy

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Tarik Ben Ziyad (613) is a SIGMA 10513 frigate of the Royal Moroccan Navy. The ship is the first of three SIGMA multi-mission frigates ordered by Morocco from Damen Schelde Naval Shipbuilding, entering service in 2011.

Moroccan frigate <i>Sultan Moulay Ismail</i> SIGMA 9813 frigate of the Royal Moroccan Navy

Sultan Moulay Ismail (614) is a SIGMA 9813 frigate of the Royal Moroccan Navy. The ship is the second of three SIGMA multi-mission frigates ordered by Morocco from Damen Schelde Naval Shipbuilding, entering service in 2012.

Moroccan frigate <i>Allal Ben Abdellah</i> SIGMA 9813 frigate of the Royal Moroccan Navy

Allal Ben Abdellah (615) is a SIGMA 9813 frigate of the Royal Moroccan Navy. The ship is the last of three SIGMA multi-mission frigates ordered by Morocco from Damen Schelde Naval Shipbuilding, entering service in 2012.

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