View source for Sigma-class design

{{Short description|Dutch-built family of modular naval vessels, of corvette or frigate size}}
{|{{Infobox ship begin
| sclass = 2
}}
{{Infobox ship image
| Ship image = Kri-diponegoro-1600-1200.jpg
| Ship caption = SIGMA 9113 corvette, KRI ''Diponegoro'' (365)
}}
{{Infobox ship class overview
| Builders = *[[Damen Schelde Naval Shipbuilding]]
* [[PAL Indonesia|PT PAL Indonesia]]
* [[Secretary of The Navy Shipyards|ASTIMAR 20]]
* [[COTECMAR]]
| Engineering = [[Damen Group|Marine Engineering Galati]]
| Operators = *{{naval|Indonesia}}
* {{naval|Morocco}}
* {{naval|Mexico}}
| Class before = 
| Class after = 
| 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)
| Built range = 2005–present
| In commission range = 2007–present
| Total ships planned = 18
| Total ships completed = 10
| Total ships active = 10
| Total ships laid up = 0
| Total ships cost = $222 million
| Total ships retired = 
| Total ships preserved = 
}}
{{Infobox ship characteristics
| Hide header = 
| Header caption = (Corvette 9113)
| Ship type = Multi-purpose [[corvette]] / [[frigate]]
| Ship displacement = 1,692 tons
| Ship length = {{convert|90.71|m|ftin|abbr=on}}
| Ship beam = {{convert|13.02|m|ftin|abbr=on}}
| Ship draught = 
| Ship draft = {{convert|3.60|m|ftin|abbr=on}}
| Ship 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 Inc.|Caterpillar]] 3406C TA generator rated at 350 kW each
* 1 × Caterpillar 3304B emergency generator rated at 105 kW
* 2 × shaft with [[Rolls-Royce plc|Rolls-Royce]] [[Kamewa Waterjets|Kamewa]] 5 bladed CP propeller
* 2 × [[Renk]] ASL94 single step reduction gear<ref>{{cite web |url= http://www.renk.de/index2.php?pageid=85&pub=2&na_id=294| type = press release | date = September 2006 | title = Diesel Propulsion Drives: When perfection arises from tradition | publisher = Renk |access-date= 2016-01-19}}</ref> with passive roll stabilization
| Ship speed = *'''Maximum''': {{convert|28|kn}}
* '''Cruising''': {{convert|18|kn}}
* '''Economy''': {{convert|14|kn}}
| Ship range = *Cruising speed at {{convert|18|kn|abbr= on}}: {{convert|3,600|nmi|abbr=on}}
* Economy speed at {{convert|14|kn|abbr=on}}: {{convert|4,800|nmi|abbr=on}}
| Ship complement = 20, up to 80
| Ship sensors = *'''Combat System''': [[Thales Group]] Tacticos<ref>{{cite web|url= http://www.thales-nederland.nl/nl/news/archive/2004/oct27-2004.shtml|title=Thales to supply key systems for new corvettes Indonesian Navy worth 60 m euro |website = Thales | place = [[Netherlands|NL]] |access-date= 2016-01-19|url-status= dead|archive-url= https://web.archive.org/web/20120209075739/http://www.thales-nederland.nl/nl/news/archive/2004/oct27-2004.shtml |archive-date= 2012-02-09}}</ref> 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 '''F'''ibre '''O'''ptical '''CO'''mmunications '''N'''etwork (Focon) or '''[[EID, S.A.|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<ref>{{cite web|url= http://marine.imtech.nl/content/content_group/76/265/File/Naval%20References.pdf |title= Projects Reference List |website= Marine | publisher = Imtech | place= NL |access-date= 2016-01-19|url-status=dead|archive-url= https://web.archive.org/web/20070928032536/http://marine.imtech.nl/content/content_group/76/265/File/Naval%20References.pdf|archive-date=2007-09-28}}</ref>
| Ship EW = *'''ESM''': Thales VIGILE 100
* '''ECM''': Racal Scorpion 2L
* '''Decoy''': Terma SKWS, DLT-12T 130mm decoy launchers, port, starboard
| Ship armament = * 1 × [[Oto Melara 76 mm]] gun (A position)
* 2 × 20 mm [[Denel Land Systems GI-2|Denel GI-2 gun]] (B position)
* 2 × quad (8)  [[Mistral missile|Mistral TETRAL]] Anti-air missile, forward & aft
* 4 × [[Exocet]] MM40 Block II/MM40 Block III anti-surface missile
* 2 × B515/3 triple launchers for lightweight [[A244-S|WASS A244-S mod.3]]/[[MU90 Impact|EuroTorp MU 90 torpedoes]]
| Ship armour = 
| Ship armor = 
| Ship aircraft = 
| Ship aircraft facilities = Landing pad, optional hangar
| Ship notes = 
}}
|}

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

SIGMA stands for Ship Integrated Geometrical Modularity Approach.<ref>{{cite web |url=https://armyrecognition.com/news/navy-news/2024/cotecmar-and-damen-sign-historic-contract-to-build-colombias-first-locally-constructed-frigate |title= COTECMAR and Damen sign historic contract to build Colombia's first locally constructed frigate.|author=<!--Not stated--> |date=12 August 2024|website= Army Recognition }}</ref> 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 (nautical)|beam]] lead to the individual SIGMA type names: the SIGMA 9113 is {{convert|91|m|ftin|abbr=on}} long with a beam of {{convert |13|m|ftin|abbr= on}}, the SIGMA 10513 is {{convert |105|m|ftin| abbr= on}} in length again with a beam of {{convert |13|m|ftin|abbr= on}}

The design was derived from the earlier High Speed Displacement hull form by Marin Teknikk AS in the 1970s.{{Citation needed|date=August 2024}}

==Versions==
There are three types of Sigma combatants
* Sigma frigate
* Sigma corvette
* Sigma fast attack corvette

Simplified comparisons between the different Sigma models.
{| class="wikitable"
|-
|+Comparisons between the different SIGMA models
|-
!  
! Compact SIGMA 7310  <ref>[http://products.damen.com/en/ranges/sigma-corvette/sigma-corvette-7310 "Sigma corvette 7310"], Damen. {{webarchive |url= https://web.archive.org/web/20150318044432/http://products.damen.com/en/ranges/sigma-corvette/sigma-corvette-7310 |date=March 18, 2015 }}</ref> 
! SIGMA 9113<ref>[http://products.damen.com/en/ranges/sigma-corvette/sigma-corvette-9113 "Sigma corvette 9113"] Damen. {{webarchive |url= https://web.archive.org/web/20140911043231/http://products.damen.com/en/ranges/sigma-corvette/sigma-corvette-9113 |date= September 11, 2014 }}</ref> 
! SIGMA 9813<ref>{{cite web |date=15 December 2012 |title=Sigma 9813 Sultan Moulay Ismail Allal Ben Abdellah Morocco Royal Moroccan Navy البحرية الملكية Frégates Multi-Missions Marocaines FMMM DSNS Damen Schelde Naval Shipbuilding datasheet pictures photos video specifications |url=http://www.navyrecognition.com/index.php?option=com_content&task=view&id=792 |url-status=dead |archive-url=https://archive.today/20130129144923/http://www.navyrecognition.com/index.php?option=com_content&task=view&id=792 |archive-date=2013-01-29 |access-date=2016-01-19 |website=Navy Recognition}}</ref>!! SIGMA 9814<ref>{{cite web |date=November 4, 2013 |title=Vietnam Navy selects MBDA Exocet and VL Mica missiles for its Sigma 9814 Corvettes |url=http://www.navyrecognition.com/index.php/news/defence-news/year-2013-news/november-2013-navy-naval-forces-maritime-industry-technology-security-global-news/1329-vietnam-navy-selects-mbda-exocet-and-vl-mica-missiles-for-its-sigma-9814-corvettes-.html |url-status=live |archive-url=https://archive.today/20131104182040/http://www.navyrecognition.com/index.php/news/defence-news/year-2013-news/november-2013-navy-naval-forces-maritime-industry-technology-security-global-news/1329-vietnam-navy-selects-mbda-exocet-and-vl-mica-missiles-for-its-sigma-9814-corvettes-.html |archive-date=2013-11-04 |access-date=2016-01-19 |website=Navy Recognition}}</ref><ref name=":0">{{cite web |url= http://navyrecognition.com/index.php/news/defence-news/year-2014-news/march-2014-navy-naval-forces-maritime-industry-technology-security-global-news/1600-design-of-future-damen-sigma-9814-corvettes-for-vietnamese-navy-revealed.html |title= Design of future Damen SIGMA 9814 Corvettes for Vietnamese Navy revealed |date=March 1, 2014|website=Navy recognition |access-date=2016-01-19}}</ref>
! SIGMA 10513<ref>{{cite web |date=14 December 2012 |title=SIGMA 10513 Tarik Ben Ziad Frigate طارق بن زياد Morocco Royal Moroccan Navy البحرية الملكية Frégates Multi-Missions Marocaines FMMM DSNS DAMEN Schelde Naval Shipbuilding datasheet pictures photos video specifications |url=http://www.navyrecognition.com/index.php?option=com_content&task=view&id=791 |url-status=dead |archive-url=https://archive.today/20130208132058/http://www.navyrecognition.com/index.php?option=com_content&task=view&id=791 |archive-date=2013-02-08 |access-date=2016-01-19 |website=Navy Recognition}}</ref>!! SIGMA PKR 10514<ref>{{cite web |date=8 December 2012 |title=SIGMA 10514 PKR Frigate Indonesia Indonesian Navy TNI AL Perusak Kawal Rudal PT PAL DSNS Damen Schelde Naval Shipbuilding KRI datasheet pictures photos video specifications |url=http://www.navyrecognition.com/index.php?option=com_content&task=view&id=778 |url-status=dead |archive-url=https://archive.today/20130129180100/http://www.navyrecognition.com/index.php?option=com_content&task=view&id=778 |archive-date=2013-01-29 |access-date=2016-01-19 |website=Navy recognition}}</ref><ref>{{Cite web |last=PUSPEN |first=Markas Besar Tentara Nasional Indonesia |date=8 April 2017 |title=Panglima TNI : KRI RE Martadinata-331 Perkuat Pertahanan dan Keamanan Laut Indonesia |trans-title=TNI Commander: KRI RE Martadinata-331 Strengthens Indonesia's Maritime Defense and Security |url=https://tni.mil.id/view-111322-panglima-tni-kri-re-martadinata-331-perkuat-pertahanan-dan-keamanan-laut-indonesia.html |url-status=live |archive-url=https://archive.today/20240717131212/https://tni.mil.id/view-111322-panglima-tni-kri-re-martadinata-331-perkuat-pertahanan-dan-keamanan-laut-indonesia.html |archive-date=17 July 2024 |access-date=17 July 2024 |website=Tentara Nasional Indonesia |language=id}}</ref>!! SIGMA 10514 POLA
! SIGMA PES 10714CO<ref>{{Cite web |last=Saumeth |first=Erich |date=2 January 2024 |title=Las nuevas fragatas colombianas contarán con armamento francés, español, italiano y surcoreano |trans-title=The new Colombian frigates will have French, Spanish, Italian and South Korean weapons |url=https://www.infodefensa.com/texto-diario/mostrar/4666651/003-colombia-nuevas-fragatas-colombianas-2808-toneladas-armamento-frances-espanol-italiano-sur-coreano |url-status=live |archive-url=https://archive.today/20240105160522/https://www.infodefensa.com/texto-diario/mostrar/4666651/003-colombia-nuevas-fragatas-colombianas-2808-toneladas-armamento-frances-espanol-italiano-sur-coreano |archive-date=2024-01-05 |access-date=2024-04-25 |website=InfoDefensa |language=es}}</ref><ref>{{Cite web |last=Saumeth |first=Erich |date=5 January 2024 |title=Colombia apuesta por los sistemas de SAAB para sus nuevas fragatas |trans-title=Colombia opts for SAAB systems for its new frigates |url=https://www.infodefensa.com/texto-diario/mostrar/4670129/004-colombia-colombia-apuesta-sistemas-saab-nuevas-fragatas |url-status=live |archive-url=https://archive.today/20240717131558/https://www.infodefensa.com/texto-diario/mostrar/4670129/004-colombia-colombia-apuesta-sistemas-saab-nuevas-fragatas |archive-date=2024-07-17 |access-date=2024-04-25 |website=InfoDefensa |language=es}}</ref>
|-
! User 
|| – || {{naval|Indonesia}} || {{naval|Morocco}} || {{flagicon|Vietnam|naval}}<br>[[Vietnam People's Navy]]||  {{naval|Morocco}} || {{naval|Indonesia}}||  {{naval|Mexico}}|| {{naval|Colombia}}
|-
! Type 
|| Fast attack corvette || Corvette || Frigate || Frigate || Frigate || Frigate || Frigate (Long Range Patrol Vessel)|| Frigate
|-
! Length 
|| 74.2 meters|| 90.01 meters || 97.91 meters || 99.91 meters || 105.11 meters || 105.11 meters ||  107.5 meters || 107.5 meters
|-
! Beam 
|| 10.00 meters || 13.02 meters || 13.02 meters || 14.02 meters ||  13.02 meters || 14.02 meters || 14.02 meters || 14.02 meters
|-
! Draft 
|| 3.10 meters || 3.60 meters || 3.75 meters || 3.75 meters ||  3.75 meters || 3.75 meters || 3.75 meters || 3.93 meters
|-
! Displacement 
|| 900 tons || 1,692 tons || 2,075 tons || 2,150 tons || 2,335 tons || 2,946 tons || 2,575 tons || 2,808 tons
|-
! Main machinery 
|| 4x 3.900 &nbsp;kW || 2 x 8.910&nbsp;kW || 2 x 8.910&nbsp;kW || tbd ||  2 x 8.910&nbsp;kW || 2 x 10.000&nbsp;kW || 2 x 13.410&nbsp;kW || 2 x 10.000&nbsp;kW
|-
!Speed (cruising) 
|| 18 knots || 18 knots || 18 knots || tbd || 18 knots || 18 knots || 18 knots || 14 knots
|-
! Speed (maximum) 
|| 34 knots || 28 knots || 28 knots || tbd||  28 knots || 28 knots || 28 knots || 26 knots
|-
! Endurance 
|| 2,000 &nbsp;nmi || 3,600&nbsp;nmi || 4,000&nbsp;nmi || tbd || 4,000&nbsp;nmi || 5,000&nbsp;nmi || 5,000&nbsp;nmi+ || 8,200&nbsp;nmi
|-
! Primary sensors 
||Thales NS-100 || Thales MW08
(Thales NS50)
| Thales SMART-S MK2 || Thales SMART-S MK2 || Thales SMART-S MK2 || Thales SMART-S MK2 || Thales SMART-S MK2 || SAAB SEA GIRAFFE 4A
|-
! Complement
|| 50 ||  80 || 91 || 103 || 110 || 122 || 122 || 125
|-
! Helicopter<br />capabilities
|| none || deck only || deck and hangar<br> (9 ton) || deck and hangar || deck and hangar<br> (9 ton)|| deck and hangar<br />(10 ton) || deck and hangar<br> (10 ton) || deck and hangar<br> (10 ton)
|-
!Status
|Design concept
|Operational
|Operational
|Cancelled<ref name=":1">{{cite web |title=Vietnam's Quest for a Greenwater Navy |url=https://thediplomat.com/2016/03/vietnams-quest-for-a-greenwater-navy/ |access-date=2016-03-18 |website=The diplomat}}</ref>
|Operational
|Operational
|Operational
|Under development
|-
|}

There are multiple new SIGMA designs released in early 2015 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 version.<ref>{{cite web |title=Damen introduced the new "Compact Sigma" line of corvettes during DSEI 2013 |url=http://www.navyrecognition.com/index.php/news/naval-exhibitions/dsei-2013/1238-damen-introduced-the-new-qcompact-sigmaq-line-of-corvettes-during-dsei-2013.html |url-status=live |archive-url=https://archive.today/20150415014749/http://www.navyrecognition.com/index.php/news/naval-exhibitions/dsei-2013/1238-damen-introduced-the-new-qcompact-sigmaq-line-of-corvettes-during-dsei-2013.html |archive-date=2015-04-15 |access-date=2016-01-19 |website=Navy Recognition}}</ref>

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 to 17 meters and a draft of 3.9 meters.<ref>{{cite web |url=https://www.armyrecognition.com/news/navy-news/2024/dimdex-2024-sigma-10514-patrulla-oceanica-de-largo-alcance-by-damen |title= DIMDEX 2024: Sigma 10514 Patrulla Oceanica de Largo Alcance by Damen. |author=<!--Not stated--> |date=5 March 2024|website= Army Recognition }}</ref>

== Users ==
* [[Indonesia]] operates four SIGMA 9113 {{Sclass|Diponegoro|corvette}} and two SIGMA 10514 {{sclass|Martadinata|frigate}}s.
* [[Mexico]] operate one SIGMA 10514 LROPV, [[ARM Benito Juárez (POLA-101)|ARM ''Benito Juárez'' (F 101)]].<ref>{{cite web |last=Higuera |first=José |date=6 January 2023 |title=Shipbuilders near and far line up for Latin American naval upgrades |url=https://www.defensenews.com/global/the-americas/2023/01/06/shipbuilders-near-and-far-line-up-for-latin-american-naval-upgrades/ |url-status=live |archive-url=https://archive.today/20240717131846/https://www.defensenews.com/global/the-americas/2023/01/06/shipbuilders-near-and-far-line-up-for-latin-american-naval-upgrades/ |archive-date=17 July 2024 |access-date=17 July 2024 |website=Defense News}}</ref>
* [[Morocco]] operates two SIGMA 9813 class heavy corvettes (with VLS) and a SIGMA 10513 class light frigate based on a modified design.

==Under construction==
* [[Mexico]] has ordered 8 SIGMA 10514 LROPV<ref>{{cite web |title=Cookies op pzc.nl - pzc.nl |url=http://www.pzc.nl/zeeuws-nieuws/mexicaanse-order-voor-damen-schelde~a366dfc5/ |url-status=dead |archive-url=https://web.archive.org/web/20170414125709/http://www.pzc.nl/zeeuws-nieuws/mexicaanse-order-voor-damen-schelde~a366dfc5/ |archive-date=14 April 2017 |access-date=27 December 2017 |website=www.pzc.nl}}</ref> based upon the Indonesian variant with different weapon systems and different role. The Mexican navy will use its SIGMA frigate as a long range patrol vessel. The keel was laid on 17 August 2017, and was launched on 23 November 2018 and service to begin in 2020. The ship will be built in six modules, with two of these modules built by Damen Schelde Naval Shipbuilding in Vlissingen in the Netherlands, and the remaining four by the Mexican Navy shipyard in Salina Cruz under the supervision of Damen Schelde Naval Shipbuilding. The SIGMA will replace the four ''Allende'' class (ex-USN {{sclass|Knox|frigate|4}}), and two Bravo class (ex-USN {{sclass|Bronstein|frigate|4}}) of frigates.{{citation needed|date=February 2019}}

==Under development==
* In September 2022, the Colombian Ministry of Defense announced that [[COTECMAR]] and Damen will co-develop five new frigates for the [[Colombian Navy]] based on the Sigma-class design.<ref>{{Cite web |last=InfoDefensa |first=Revista Defensa |title=Damen construirá las cinco fragatas del programa PES de Colombia |trans-title=Damen to build five frigates for Colombia's PES programme |url=https://www.infodefensa.com/texto-diario/mostrar/3900005/damen-construira-cinco-fragatas-programa-pes-colombia |url-status=live |archive-url=https://archive.today/20240717132228/https://www.infodefensa.com/texto-diario/mostrar/3900005/damen-construira-cinco-fragatas-programa-pes-colombia |archive-date=17 July 2024 |access-date=17 July 2024 |website=InfoDefensa |language=es}}</ref> The Colombian Navy awarded a contract to COTECMAR to build the service's first frigate under the Strategic Surface Platform (''Plataforma Estratégica de Superficie'' or PES) project on 22 November 2022. The ship's design was finalized in 2023 between Cotecmar & Damen Naval, construction can begin by 2025.<ref>{{Cite web |title=Colombian Navy awards contract to COTECMAR for first PES frigate, ocean patrol vessel, and logistic support ship |url=https://www.janes.com/defence-news/news-detail/colombian-navy-awards-contract-to-cotecmar-for-first-pes-frigate-ocean-patrol-vessel-and-logistic-support-ship |url-status=live |archive-url=https://archive.today/20240717135114/https://www.janes.com/osint-insights/defence-news/sea/colombian-navy-awards-contract-to-cotecmar-for-first-pes-frigate-ocean-patrol-vessel-and-logistic-support-ship |archive-date=2024-07-17 |access-date=2023-01-15 |website=Janes |language=en}}</ref> In April 2024, the program were reported to have been facing problems and is expected to miss its planned construction date.<ref>{{Cite web |last=Saumeth |first=Erich |date=1 April 2024 |title=Colombia, enredada en la construcción de sus futuras fragatas |trans-title=Colombia, entangled in the construction of its future frigates |url=https://www.infodefensa.com/texto-diario/mostrar/4775305/063-primicia-colombia-problemas-construccion-futuras-fragatas |url-status=live |archive-url=https://archive.today/20240401161656/https://www.infodefensa.com/texto-diario/mostrar/4775305/063-primicia-colombia-problemas-construccion-futuras-fragatas |archive-date=2024-04-01 |access-date=2024-04-25 |website=InfoDefensa |language=es}}</ref><ref>{{Cite web |last=Williams |first=Lachlan |date=2024-04-02 |title=Colombia's Frigate Project Faces Obstacles |url=https://www.riotimesonline.com/colombias-frigate-project-faces-obstacles/ |url-access=subscription |access-date=2024-04-25 |website=The Rio Times |language=en-US}}</ref> In August 2024 it was reported that Damen and COTECMAR had signed a contract for the construction of a frigate based on the Sigma 10514 model.<ref>{{cite web |url= https://www.navalnews.com/naval-news/2024/08/cotecmar-and-damen-sign-contract-for-construction-of-frigate-for-colombian-navy/ |title= COTECMAR and Damen sign contract for construction of frigate for Colombian Navy |author=<!--Not stated--> |date=14 August 2024 |website= Naval News }}</ref><ref>{{cite web |url= https://www.navaltoday.com/2024/08/12/damen-cotecmar-join-forces-on-colombian-navys-frigate/ |title= COTECMAR join forces on Colombian Navy’s frigate |author= Fatima Bahtić |date=12 August 2024 |website= Naval Today }}</ref> As part of the agreement Damen will supply technical support and components for the construction, while the frigate will be built by  COTECMAR.<ref>{{cite web |url= https://swzmaritime.nl/news/2024/08/15/damen-and-cotecmar-to-build-frigate-in-colombia/ |title= Damen and COTECMAR to build frigate in Colombia |author= Mariska Buitendijk |date=15 August 2024 |website= SWZ&#124;Maritime}}</ref><ref>{{cite web |url= https://www.naval-technology.com/news/colombian-naval-industry-takes-step-with-frigate-construction-deal/ |title= Colombian naval industry takes step with frigate construction deal |author= Harry McNeil |date=13 August 2024 |website= Naval Technology }}</ref>

==Potential operators==
* [[Greece]] - Damen Schelde submitted a proposal to the [[Hellenic Navy]] for SIGMA 10514HN Corvetes based on the SIGMA 10514.<ref>{{cite web |date=14 November 2021 |title=Dutch shipyard DAMEN submits its SIGMA 10514 frigate for Hellenic Navy program |url=https://www.navyrecognition.com/index.php/naval-news/naval-news-archive/2021/november/10992-dutch-shipyard-damen-submits-its-sigma-10514-frigate-for-hellenic-navy-program.html |url-status=live |archive-url=https://archive.today/20240717135433/https://www.armyrecognition.com/news/navy-news/2021/dutch-shipyard-damen-submits-its-sigma-10514-frigate-for-hellenic-navy-program |archive-date=17 July 2024 |access-date=17 July 2024 |website=Navy Recognition}}</ref> This proposal along with Naval Group's proposal for [[Gowind-class design|Gowind 2500]] are the candidates for the future Hellenic Navy's corvettes to replace the older [[Elli-class frigate]]s
* [[Malaysia]] - Although SIGMA-class design not be chosen as [[Maharaja Lela-class frigate|Littoral Combat Ship]] (LCS) program, Damen with Malaysian shipyard, Gading Marine has offered their improved SIGMA 9113 LMS design for RMN Littoral Mission Ship (LMS) second batch during Defence Services Asia 2022 (DSA 2022).<ref>{{cite web |date=6 April 2022 |title=DSA 2022: Damen showcases Sigma 9113 LMS corvette |url=https://www.navyrecognition.com/index.php/naval-news/naval-news-archive/2022/april/11593-dsa-2022-damen-showcases-sigma-9113-lms-corvette.html |url-status=live |archive-url=https://archive.today/20240717135706/https://www.armyrecognition.com/news/navy-news/2022/dsa-2022-damen-showcases-sigma-9113-lms-corvette |archive-date=17 July 2024 |access-date=17 July 2024 |website=Navy Recognition}}</ref>
* [[Peru]] - The [[Peruvian Navy]] plans to acquire between three and six ships, with a displacement of 3,000 to 4,000 tons. During the 6th International Exhibition of Technology in Defense and Prevention of Natural Disasters (Sitdef 2017) Damen Group offered the SIGMA-class design to the Peruvian Navy. It believes that the variety of models of frigates offered by the SIGMA series allows to fit without difficulty to the requirements of the Peruvian Navy.<ref>{{cite web |date=2017-05-26 |title=Damen apuesta a su serie Sigma para el mercado naval latinoamericano |trans-title=Damen bets on its Sigma series for the Latin American naval market |url=http://www.infodefensa.com/latam/2017/05/26/noticia-damen-apuesta-serie-sigma-mercado-naval-latinoamericano.html |url-status=live |archive-url=https://archive.today/20240717135958/https://www.infodefensa.com/texto-diario/mostrar/3076338/damen-apuesta-serie-sigma-mercado-naval-latinoamericano |archive-date=17 July 2024 |access-date=10 February 2018 |publisher=InfoDefensa |language=es}}</ref>
* [[Poland]] - Damen Schelde submitted its SIGMA PL 10514 in two variants for the competition to supply the [[Polish Navy]] with options for their Miecznik & Czapla programmes.<ref>{{cite web |date=21 June 2016 |title=Balt Military Expo 2016: DAMEN Unveils SIGMA 10514PL Designs Based on SIGMA 10514 PKR |url=http://www.navyrecognition.com/index.php?option=com_content&view=article&id=4104 |url-status=live |archive-url=https://web.archive.org/web/20170415012814/http://www.navyrecognition.com/index.php?option=com_content&view=article&id=4104 |archive-date=15 April 2017 |access-date=27 December 2017 |website=Navy Recognition}}</ref> Miecznik will be a coastal defense ship and Czapla a patrol ship.

== Failed bids ==
* [[Brazil]] - Damen and [[Saab AB]] joined in a consortium called "Damen-Saab Tamandaré" with a bid to supply the [[Brazilian Navy]] with four new [[Tamandaré-class frigate|''Tamandaré''-class frigate]]s. On 28 March 2019, Damen lost the competition to a consortium led by [[TKMS]] and [[Embraer]] with a project derived of the MEKO A-100-class corvettes.<ref>{{Cite news |date=15 October 2018 |title=Marinha do Brasil divulga short-list do Projeto classe Tamandaré |trans-title=Brazilian Navy releases shortlist for 'Tamandaré' class Project |url=https://www.naval.com.br/blog/2018/10/15/marinha-do-brasil-divulga-short-list-do-projeto-classe-tamandare |website=Poder Naval |language=pt}}</ref><ref>{{Cite news|url=https://www.marinha.mil.br/projeto-classe-tamandare-marinha-do-brasil-seleciona-melhor-oferta|title=Projeto Classe Tamandaré Marinha do Brasil seleciona a melhor oferta|date=28 March 2019|website=Marinha do Brasil|language=pt}}</ref>
* [[Egypt]] - Damen Schelde was in competition for four SIGMA corvettes (+ two options) for the [[Egyptian Navy]]. The French Gowind-class corvette won this bid. The other competitor was the TKMS MEKO A200.<ref>{{cite web |title=Egyptian Navy would be about to order 4 to 6 Gowind Combat Corvettes from DCNS |url=http://www.navyrecognition.com/index.php?option=com_content&task=view&id=1609 |access-date=2016-01-19 |website=Navyrecognition.com| date=5 March 2014 }}</ref>
* [[Malaysia]] - Damen Schelde participated in the competition to supply the [[Royal Malaysian Navy]] with six frigates under the [[Second Generation Patrol Vessel]] program. It was chosen as the winner but unfortunately, Malaysia's Defence Minister had changed the result to the [[France|French]] [[Gowind-class corvette#Malaysia|Gowind class]] due to interference from Boustead Naval Shipyard.<ref>{{cite web|url=https://m.malaysiakini.com/news/630825|title=Navy ignored on littoral combat ships, RM1b cost overruns - PAC report|date=4 August 2022 }}</ref> The other competitor was the [[MEKO]] A200.
* [[Oman]] - Oman had an interest in buying four SIGMA corvettes/frigates in March 2011. The Dutch queen [[Beatrix of the Netherlands|Beatrix]] planned a state visit to Oman, one of the reasons for the visit being the potential sale of the ships to the [[Royal Navy of Oman]]. The official visit was cancelled due to the unrest in Oman at the time, although the queen did go to an unofficial dinner with the [[Sultan of Oman]]. The official visit took place later in January 2012. During the first visit to Oman, the [[Royal Netherlands Navy]] sent its air defence warfare frigate {{HNLMS|De Ruyter|F804|6}} to [[Muscat, Oman|Muscat]]. In April 2012 it was announced that they lost to the [[Singapore]]an {{sclass|Al-Ofouq|patrol vessel|1}} by [[ST Engineering]]. Damen had offered the SIGMA 7513.
* [[Philippines]] - Damen Schelde bought bidding documents but did not submit an offer.{{citation needed|date=October 2020}}
* [[Romania]] - Romania is planning to purchase four corvettes in the upcoming seven years, which have to be built and equipped in a Romanian building yard.<ref name="auto2">{{cite web |date=2018-02-09 |title=Romania to buy 3 sub, 4 ships to bolster Black Sea ops |url=https://www.defensenews.com/naval/2018/02/09/romania-to-buy-3-sub-4-ships-to-bolster-black-sea-ops/ |access-date=11 February 2018 |publisher=DefenseNews |language=en}}</ref><ref name="auto3">{{cite web |title=România cumpără 4 corvete noi, pe care Olanda le va fabrica la Galaţi. Cât costă navele şi de ce are România nevoie de ele |url=http://www.gandul.info/stiri/romania-cumpara-4-corvete-noi-pe-care-olanda-le-va-fabrica-la-galati-cat-costa-navele-si-de-ce-are-romania-nevoie-de-ele-15905826 |access-date=11 February 2018 |publisher=Gandul |language=ro}}</ref> Previously, in December 2016, the Romanian government decided that Damen Group would build four SIGMA light frigates for 1.6 billion euro at the [[Galați shipyard|Damen Galați Shipyard]].<ref>{{citation |title=PM Grindeanu: Thursday we'll repeal Ciolos Government's decision on corvettes |date=15 March 2017 |url=http://www.nineoclock.ro/pm-grindeanu-thursday-well-repeal-ciolos-governments-decision-on-corvettes/ |publisher=Nine o'clock |access-date=11 February 2018}}</ref> However, the new Romanian government is repealing this decision and will re-open the procurement again.<ref>{{cite web |date=2017-08-21 |title=Romania's Naval Forces at crossroads |url=http://www.romaniajournal.ro/defence-ministry-to-buy-4-corvettes-by-2024-in-a-eur-1-6bn-investment/ |url-status=dead |archive-url=https://web.archive.org/web/20180212005134/http://www.romaniajournal.ro/defence-ministry-to-buy-4-corvettes-by-2024-in-a-eur-1-6bn-investment/ |archive-date=12 February 2018 |access-date=11 February 2018 |publisher=Romania Energy Center |language=en |df=dmy-all}}</ref> Nonetheless, Damen Group is a top contender for the job, since it has the only shipyard in Romania that has recent experience with building new naval ships reasonably fast and at a competitive price.<ref>{{cite web |title=Defence Ministry to buy 4 corvettes by 2024 in a EUR 1.6bn investment |url=https://www.roec.biz/project/romanias-naval-forces-at-crossroads/ |access-date=11 February 2018 |publisher=The Romania Journal |language=en}}</ref> In July 2019, the Romanian authorities announced the selection of Naval Group and its partner Santierul Naval Constanta (SNC) for the programme to build four new [[Gowind-class design|Gowind multi-mission corvettes]].
* [[United Arab Emirates]] - Damen had submitted an offer (likely the SIGMA 9813 or SIGMA 9814) for the {{sclass|Abu Dhabi|corvette|1}}s. It lost to a corvette based on the [[Italy|Italian]] {{sclass|Comandanti|patrol vessel|4}}.
* [[Vietnam]] - Vietnam in 2011 shows interest in buying four SIGMA corvette with two of them to be built by DSNS in Vietnam.<ref>{{Cite web |last=Eshel |first=Tamir |date=2011-10-23 |title=Vietnam Negotiate Buying four Sigma Corvettes from the Netherlands |url=https://defense-update.com/20111023_vietnam-negotiate-buying-four-sigma-corvettes-from-the-netherlands.html |access-date=2022-08-16 |website=Defense Update |language=en-US}}</ref> The design were revealed to be SIGMA 9814 during Vietship 2014 Nava Exhibition in Vietnam.<ref name=":0" /> As of 2016 the program seems to be cancelled.<ref name=":1" />

== Indonesian Navy variants ==
[[File:Hasanuddin-2.jpg|thumb|[[Indonesian Navy]] SIGMA 9113 corvette, KRI ''Sultan Hasanuddin'' (366).|300x300px]]

=== SIGMA 9113 ===
{{Main|Diponegoro-class corvette}}
The Indonesian variant is based on the SIGMA 9113 design.<ref>{{cite web|url= http://www.scheldeshipbuilding.com/sigmacorvette.htm |title= Indonesian Specifications of the Sigma Class coverttes|website= Schelde shipbuilding |access-date=2016-01-19 |url-status= dead|archive-url= https://web.archive.org/web/20110928162530/http://www.scheldeshipbuilding.com/sigmacorvette.htm|archive-date= 2011-09-28}}</ref> 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.<ref>{{cite web|url= http://www.antara.co.id/en/arc/2007/7/3/navy-chief-takes-delivery-of-corvette-made-in-netherlands/ |title= Navy chief takes delivery of corvette made in Netherlands |website= Antara | place = [[Indonesia|ID]] |access-date= 2016-01-19 |url-status=dead|archive-url= https://web.archive.org/web/20090410153424/http://www.antara.co.id/en/arc/2007/7/3/navy-chief-takes-delivery-of-corvette-made-in-netherlands/|archive-date=2009-04-10}}</ref>

Options for two other units were exercised in January 2006 with the first steel cut commenced on 3 April 2006<ref>{{cite web|url= http://www.damen.nl/Upload/Downloads/mID_5708_cID_4719_DAMEN-NEWS-7-LR.pdf |title=Two Sigma 9113 corvettes more for Indonesia |url-status=dead |archive-url= https://web.archive.org/web/20061001005953/http://www.damen.nl/Upload/Downloads/mID_5708_cID_4719_DAMEN-NEWS-7-LR.pdf |archive-date= October 1, 2006 }}</ref> in [[Damen Group|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<ref>{{cite web|url= http://www4.janes.com/subscribe/jni/doc_view.jsp?K2DocKey=/content1/janesdata/mags/jni/history/jni2010/jni73957.htm@current&Prod_Name=JNI&QueryText= |title=JMR: Indonesia evaluates C-802|website=Jane's |access-date=2016-01-19}}{{dead link|date=March 2018 |bot=InternetArchiveBot |fix-attempted= yes}}</ref> that Indonesia was having problems securing the export license for the MM40 [[Exocet]] block II and was considering Chinese made [[C-802]] [[anti-ship missile]]s as alternatives. However, the ships have already been delivered with the Exocet missiles.

In 2018 [[Thales Nederland|Thales]] has upgraded the Indonesian Navy's ''Diponegoro''-class corvette through the installation and refurbishment of the Kingklip hull-mounted sonar system.<ref>{{Cite web |title=Indonesian Navy Upgrades Corvette with Thales' Kingklip Sonar |url=https://www.thalesgroup.com/en/indonesia/news/indonesian-navy-upgrades-corvette-thales-kingklip-sonar |access-date=2022-11-30 |website=Thales Group |date=31 July 2018 |language=en}}</ref>

In 2019 the ''Diponegoro''-class corvettes were upgraded with MM40 [[Exocet]] block III missile.<ref>{{Cite web |title=Indonesia conducts first firing of Exocet MM40 Block 3 from SIGMA corvette |url=https://www.janes.com/defence-news/news-detail/indonesia-conducts-first-firing-of-exocet-mm40-block-3-from-sigma-corvette |access-date=2022-08-16 |website=Janes.com |language=en}}</ref>

On 31 August 2021, [[Terma A/S|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.<ref>{{Cite web |title=Terma signs 2 new naval contracts in Indonesia |url=https://www.terma.com/insights-events/news/news-archive/2021/terma-signs-2-new-naval-contracts-in-indonesia/ |access-date=2022-11-30 |website=Terma |language=en-US}}</ref>

On 4 November 2022, [[Thales Nederland|Thales]] has signed a contract with [[:id:Len Industri|PT. Len]] to undertake the refurbishment of the integrated mission systems for ''Diponegoro''-class ships.<ref>{{Cite web |title=Thales Strengthens its Leading Position in the Indonesian Defence Industry |url=https://www.thalesgroup.com/en/worldwide/defence/press_release/thales-strengthens-its-leading-position-indonesian-defence-industry |access-date=2022-11-22 |website=Thales Group |date=4 November 2022 |language=en}}</ref> The corvettes will be updated with Thales TACTICOS Baseline 2 combat management system (CMS) and the Naval Smarter (NS) NS50 radar system.<ref>{{Cite web |title=Thales, PT Len to upgrade Indonesian corvettes |url=https://www.janes.com/defence-news/news-detail/thales-pt-len-to-upgrade-indonesian-corvettes |access-date=2022-11-22 |website=Janes.com |language=en}}</ref>[[File:Indonesia_frigate_KRI_I_Gusti_Ngurah_Rai_(332)_arriving_at_Pearl_Harbor_to_participate_in_RIMPAC_2022.jpg|thumb|[[Indonesian Navy]] SIGMA 10514 frigate, KRI ''I Gusti Ngurah Rai'' (332) arriving at Pearl Harbor to participate in RIMPAC 2022.|300x300px]]

=== SIGMA 10514 ===
{{main|Martadinata-class frigate}}
On the 16 August 2010, Indonesian Defense Ministry, signed a deal<ref>{{cite web|url= http://www4.janes.com/subscribe/jmr/doc_view.jsp?K2DocKey=/content1/janesdata/mags/jmr/history/jmr2007/jmr70650.htm@current&Prod_Name=JMR&QueryText= |title= JNR: Indonesia selects Damen for frigate contract|website=Jane's |access-date= 2016-01-19}}{{dead link|date= March 2018 |bot= InternetArchiveBot |fix-attempted= yes}}</ref><ref>{{cite web |url= http://www.damennaval.com/nl/news.htm?item=33 |title= Damen Schelde Naval Shipbuilding |access-date= 2016-01-19}}</ref> 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 [[MICA (missile)|VL-MICA]], [[Exocet|MM40 Exocet block III]], [[Rheinmetall Oerlikon Millennium Gun|Rheinmetall Millennium CIWS]], [[Electronic warfare|Electronic warfare system]] and were planned to be installed later on ([[For but not with|FFBNW]]).<ref>{{Cite web |last=Scott |first=Richard |date=17 November 2016 |title=Negotiations under way on additional equipment package for Indonesia's PKR frigate |url=http://www.janes.com/article/65579/negotiations-under-way-on-additional-equipment-package-for-indonesia-s-pkr-frigate |url-status=dead |archive-url=https://web.archive.org/web/20161118134452/http://www.janes.com/article/65579/negotiations-under-way-on-additional-equipment-package-for-indonesia-s-pkr-frigate |archive-date=18 November 2016 |website=janes.com}}</ref>

As of December 2015, the first ship, KRI ''Raden Eddy Martadinata'' (331), was 85% complete and the ship was launched on 18 January 2016.<ref>{{cite web |url= http://www.navyrecognition.com/index.php/news/defence-news/year-2013-news/november-2013-navy-naval-forces-maritime-industry-technology-security-global-news/1365-thales-to-supply-mission-suite-for-indonesian-navy-tni-al-pkr-vessels.html |title=Thales to supply mission suite for Indonesian Navy (TNI-AL) PKR vessels |date=November 18, 2013|website= Navy recognition |access-date= 2016-01-19}}</ref><ref>{{cite web |url= http://www.navyrecognition.com/index.php/news/defence-news/year-2014-news/january-2014-navy-naval-forces-maritime-industry-technology-security-global-news/1493-damen-dsns-starts-steel-cutting-for-sigma-10514-pkr-frigate-for-indonesia-navy-tni-al.html |title= Damen (DSNS) starts steel cutting for Sigma 10514 PKR Frigate for Indonesia Navy (TNI AL) |date=January 15, 2014|website=Navy recognition |access-date=2016-01-19}}</ref><ref>{{cite web |url= http://www.navyrecognition.com/index.php/news/defence-news/year-2014-news/april-2014-navy-naval-forces-maritime-industry-technology-security-global-news/1760-damen-schelde-naval-shipbuilding-lays-keel-of-first-sigma-10514-pkr-frigate-for-tni-al-indonesia.html |title=Damen Schelde Naval Shipbuilding lays keel of first Sigma 10514 PKR Frigate for TNI AL (Indonesia) |date=April 19, 2014 |website= Navy recognition |access-date= 2016-01-19}}</ref> On 7 April 2017 the first ship, KRI ''Raden Eddy Martadinata'' (331), was commissioned at [[Tanjung Priok]].<ref name="auto">{{cite web |last=Rahmat |first=Ridzwan |title=Indonesia commissions first Martadinata-class guided-missile frigate |url=http://www.janes.com/article/69422/indonesia-commissions-first-martadinata-class-guided-missile-frigate |access-date=9 May 2017 |publisher=IHS Jane's 360}}</ref> The second ship, KRI ''I Gusti Ngurah Rai'' (332), was commissioned on 10 January 2018.<ref name="auto1">{{cite web |title=Indonesia commissions second Martadinata-class frigate |url=http://www.janes.com/article/76971/indonesia-commissions-second-martadinata-class-frigate |url-status=dead |archive-url=https://web.archive.org/web/20180111170704/http://www.janes.com/article/76971/indonesia-commissions-second-martadinata-class-frigate |archive-date=11 January 2018 |access-date=11 January 2018 |publisher=Jane's 360 |df=dmy-all}}</ref>

The class finally received their full complement of [[For but not with|FFBNW]] system and equipment in December 2019 for KRI ''Raden Eddy Martadinata'' (331)<ref>{{Cite web |title=Damen completes combat systems installation & trials on Indonesian guided missile frigate |url=https://archive.damen.com/en/news/2019/12/damen_completes_combat_systems_installation_and_trials_on_indonesian_guided_missile_frigate |access-date=2022-08-16 |website=archive.damen.com}}</ref> and March 2020 for KRI ''I Gusti Ngurah Rai'' (332).<ref>{{Cite web |title=Damen completes combat systems installation and trials on second Indonesian guided missile frigate |url=https://archive.damen.com/en/news/2020/03/damen_completes_combat_systems_installation_and_trials_on_second_indonesian_guided_missile_frigate |access-date=2022-08-16 |website=archive.damen.com}}</ref>

== Moroccan Navy variants ==
[[File:Tarik Ben Ziad 06.jpg|thumb|[[Royal Moroccan Navy]] SIGMA 10513 frigate, ''Tarik Ben Ziyad'' (613).|300x300px]]
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.<ref>{{cite news |author=Joris Janssen Lok |date=8 February 2008 |title=Morocco's Dutch Frigate Order is Confirmed |publisher=[[Aviation Week & Space Technology]] |url=http://www.aviationweek.com/aw/blogs/defense/index.jsp?plckController=Blog&plckScript=blogScript&plckElementId=blogDest&plckBlogPage=BlogViewPost&plckPostId=Blog%3a27ec4a53-dcc8-42d0-bd3a-01329aef79a7Post%3ab9f672a5-abfe-4d8b-a8fa-1144be7390d5 |access-date=8 February 2008 |archive-date=21 May 2011 |archive-url=https://web.archive.org/web/20110521055539/http://www.aviationweek.com/aw/blogs/defense/index.jsp?plckController=Blog&plckScript=blogScript&plckElementId=blogDest&plckBlogPage=BlogViewPost&plckPostId=Blog:27ec4a53-dcc8-42d0-bd3a-01329aef79a7Post:b9f672a5-abfe-4d8b-a8fa-1144be7390d5 |url-status=dead }}</ref>

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.<ref>{{cite web |author=Frank van de Wiel |date=7 April 2008 |title=Thales awarded contract for Moroccan OPV |url=http://www.thalesgroup.com/netherlands/Press-Room/Press-Release-search-all/Press-Release-search-result/Press-Release-Article2.html?link=25165439-272e-7b69-507d-1722561c0d5a:central&locale=EN-gb&Title=Thales+awarded+contract+for+Moroccan+OPV&dis=1 |url-status=dead |archive-url=https://web.archive.org/web/20080413091633/http://www.thalesgroup.com/netherlands/Press-Room/Press-Release-search-all/Press-Release-search-result/Press-Release-Article2.html?link=25165439-272e-7b69-507d-1722561c0d5a%3Acentral&locale=EN-gb&Title=Thales+awarded+contract+for+Moroccan+OPV&dis=1 |archive-date=April 13, 2008 |publisher=[[Thales Nederland]]}}</ref>

The first frigate for Morocco, ''Tarik ben Ziyad'', was launched in July 2010,<ref name="ship2"/> began sea trials on 6 May 2011<ref name="trials">{{cite web|title=First Multi Mission Frigate for Royal Moroccan Navy Starts Sea Trials|url=http://shipbuildingtribune.com/2011/05/12/first-multi-mission-frigate-for-royal-moroccan-navy-finishes-sea-trials/|publisher=Shipbuilding Tribune|access-date=2 October 2011|archive-url=https://web.archive.org/web/20110811053106/http://shipbuildingtribune.com/2011/05/12/first-multi-mission-frigate-for-royal-moroccan-navy-finishes-sea-trials/|archive-date=11 August 2011|date=12 May 2011|url-status=dead}}</ref> and was delivered on 12 September 2011.<ref>{{cite web|title=Damen Schelde Naval Shipbuilding Delivers SIGMA Class Frigate to Royal Moroccan Navy|url=http://shipbuildingtribune.com/2011/09/12/damen-schelde-naval-shipbuilding-delivers-sigma-class-frigate-to-royal-moroccan-navy/|publisher=Shipbuilding Tribune|access-date=2 October 2011|archive-url=https://web.archive.org/web/20120331191504/http://shipbuildingtribune.com/2011/09/12/damen-schelde-naval-shipbuilding-delivers-sigma-class-frigate-to-royal-moroccan-navy/|archive-date=31 March 2012|date=12 September 2011|url-status=dead}}</ref> The second ship was launched on 2 February 2011,<ref name="ship2">{{cite web|title=The Netherlands: Second Multi-Mission Frigate Launches at Damen Shipyard for Moroccan Navy|url=http://shipbuildingtribune.com/2011/03/04/the-netherland-second-multi-mission-frigate-launches-at-damen-shipyard-for-royal-moroccan-navy/|publisher=Shipbuilding Tribune|access-date=2 October 2011|archive-url=https://web.archive.org/web/20110814235016/http://shipbuildingtribune.com/2011/03/04/the-netherland-second-multi-mission-frigate-launches-at-damen-shipyard-for-royal-moroccan-navy/|archive-date=14 August 2011|date=4 March 2011|url-status=dead}}</ref> with sea trials planned for late in the year.<ref name="trials"/> The third ship was planned to be launched in September 2011.<ref name="trials"/>

== Mexican Navy variant ==
[[File:ARM Benito Juarez (1).jpg|300px|thumb|[[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 [[Harpoon (missile)|RGM-84L Harpoon Block II]], [[RIM-162 ESSM]]<ref>{{Cite web|url=https://www.janes.com/article/82321/mexico-to-acquire-evolved-seasparrow-missiles|title=Mexico to acquire Evolved SeaSparrow Missiles &#124; Jane's 360|website=www.janes.com}}</ref> with eight cell MK 56 VLS launcher, [[Mark 54 Lightweight Torpedo|MK 54 Mod 0 lightweight torpedoes]] with two MK 32 Surface Vessel Torpedo Tubes (SVTT) triple tube launchers, [[RIM-116 Rolling Airframe Missile|Block II Rolling Airframe Missile (RAM) missiles]] and [[Bofors 57 mm L/70 naval artillery gun|Bofors 57 mm gun]].<ref>{{cite press release|url=http://www.dsca.mil/major-arms-sales/mexico-harpoon-block-ii-missiles-ram-missiles-and-mk-54-torpedoes|title=DSCA Major Arms Sales News Release|publisher=DSCA|date=5 January 2018|access-date=6 January 2018}}</ref>

In April 2018 [[Damen Group]] contracted Spanish defense technology company [[Indra Sistemas|Indra]] to equip the Mexican Navy's new long-range offshore patrol vessel (POLA) with its RIGEL electronic defense system.<ref>{{cite web|url=https://navaltoday.com/2018/04/18/mexican-navy-long-range-opv-getting-indras-rigel-electronic-defense-system/|title=Mexican Navy long-range OPV getting Indra's RIGEL electronic defense system|publisher=Naval Today|date=18 April 2018|access-date=18 April 2018}}</ref>

==Ships of the class==
{| class="wikitable"
|-
! Name
! Pennant
! Builder
! Laid down
! Launched
! Commissioned
! Notes
|-
!colspan=7 | {{naval|Indonesia}}
|-
!colspan="7" | SIGMA 9113 design
|-
| {{ship|KRI|Diponegoro|365|6}}
| 365
| rowspan="4" | [[Damen Schelde Naval Shipbuilding|Damen]], [[Vlissingen]]
| 24 March 2005
| 16 September 2006
| 5 July 2007
| [[Diponegoro]], a National Hero from [[Central Java]].
|-
| {{ship|KRI|Sultan Hasanuddin||6}}
| 366
| 24 March 2005
| 16 September 2006
| 24 November 2007
| [[Sultan Hasanuddin]], a National Hero from [[South Sulawesi]].
|-
| {{ship|KRI|Sultan Iskandar Muda|367|6}}
| 367
| 8 May 2006
| 24 November 2007
| 18 October 2008
| [[Iskandar Muda|Sultan Iskandar Muda]], a National Hero from [[Aceh]].
|-
| {{ship|KRI|Frans Kaisiepo||6}}
| 368
| 8 May 2006
| 28 June 2008
| 7 March 2009
| [[Frans Kaisiepo]], a National Hero from [[Western New Guinea|Papua]] and the fourth Governor of [[Papua (province)|Papua province]].
|-
!colspan="7" | SIGMA 10514 design
|-
| {{ship|KRI|Raden Eddy Martadinata||6}}
| 331
| rowspan="2" |Damen, Vlissingen<hr>[[PAL Indonesia]], [[Surabaya]]
| 16 April 2014
| 18 January 2016
| 7 April 2017
| Named after [[Eddy Martadinata|Raden Eddy Martadinata]], a national hero from [[Bandung]] and one of the founders of the Indonesian Navy.
|-
| {{ship|KRI|I Gusti Ngurah Rai||6}}
| 332
| 18 January 2016
| 29 September 2016
| 10 January 2018
| Named after [[I Gusti Ngurah Rai]], a national hero from [[Bali|Bali Island]] and leader of the [[Indonesian National Revolution|Puputan War]] against the Dutch colonialist government.
|-
!colspan=7 | {{naval|Morocco}}
|-
!colspan="7" | SIGMA 10513 design
|-
| {{ship|Moroccan frigate|Tarik Ben Ziyad||2}}
| 613
| Damen, Vlissingen
| April 2008
| 12 July 2010<ref>{{cite web|url=http://www.damennaval.com/nl/news.htm?item=16 |title=News – Damen Schelde Naval Shipbuilding |publisher=Damennaval.com |date=2010-07-18 |access-date=2011-12-28}}</ref>
| 23 December 2011
|Now shows on AIS as ''Sultan Moulay Ismail''.{{Citation needed|date=January 2023}}
|-
!colspan="7" | SIGMA 9813 design
|-
| {{ship|Moroccan frigate|Sultan Moulay Ismail||2}}
| 614
| rowspan="2" |Damen, Vlissingen
| March 2009
| 2 February 2011<ref>{{cite web |title=News – Damen Schelde Naval Shipbuilding |url=http://www.damennaval.com/nl/news.htm?item=19 |access-date=2011-12-28 |publisher=Damennaval.com}}</ref>
| 10 March 2012<ref>{{cite web |date=2012-03-14 |title=Moroccan Navy receives second Sigma-class frigate |url=http://www.naval-technology.com/news/newsmoroccan-navy-receives-second-sigma-class-frigate |work=Naval Technology}}</ref>
|
|-
| {{ship|Moroccan frigate|Allal Ben Abdellah||2}}
|615
|September 2009
|October 2011
|8 September 2012<ref>{{cite web |date=2012-09-12 |title=Moroccan Navy commissions its third SIGMA-class frigate |url=http://www.naval-technology.com/news/newsmoroccan-navy-commissions-third-sigma-class-frigate |work=Naval Technology}}</ref>
|
|-
!colspan=7 | {{naval|Mexico}}
|-
!colspan="7" | SIGMA 10514 LROPV/POLA design
|-
| [[ARM Benito Juárez (POLA-101)|ARM ''Benito Juárez'']] 
| 101
| Damen, Vlissingen<hr>[[Secretary of The Navy Shipyards|ASTIMAR 20]], [[Salina Cruz]]
| 17 August 2017<ref>{{cite press release|url=https://www.gob.mx/semar/prensa/la-secretaria-de-marina-armada-de-mexico-impulsa-la-industria-naval-con-la-patrulla-oceanica-de-largo-alcance-pola|title=La Secretaría de Marina - Armada de México impulsa la Industria Naval con la Patrulla Oceánica de Largo Alcance (Pola)|publisher=[[SEMAR]]|language=es|date=17 August 2017|access-date=18 August 2017}}</ref>
| 23 November 2018<ref name="ARM Reformador">{{cite press release|url=https://www.gob.mx/semar/prensa/la-secretaria-de-marina-conmemora-el-dia-de-la-armada-de-mexico-con-la-botadura-y-abanderamiento-de-la-primera-patrulla-oceanica-de-largo-alcance|title=SEMAR conmemora el "Día de la Armada de México" con la botadura y abanderamiento de la primera Patrulla Oceánica de Largo Alcance|publisher=SEMAR|language=es|date=23 November 2018|access-date=25 November 2018}}</ref>
| 10 February 2020<ref>{{Cite web |title=Damen delivers Long Range Ocean Patrol Vessel to the Mexican Navy |url=https://archive.damen.com/en/news/2020/02/damen_delivers_long_range_ocean_patrol_vessel_to_the_mexican_navy |access-date=2022-08-16 |website=archive.damen.com}}</ref>
|ARM ''Benito Juárez'' (F 101) was formally named ARM ''Reformador'' (P 101) being renamed in March 2020''.''<ref>{{Cite web |last=Defensa.com |date=2020-05-13 |title=La POLA ARM-101 "Benito Juárez" de la Armada de México podría ir a su primer ejercicio naval: RIMPAC 2020-noticia defensa.com - Noticias Defensa México |url=https://www.defensa.com/mexico/pola-arm-101-benito-juarez-armada-mexico-podria-ir-primer-naval |access-date=2022-08-16 |website=Defensa.com |language=es}}</ref>
|}

==See also==
* [[List of naval ship classes in service]]
* [[Martadinata-class frigate]] (an Indonesian frigate class based on the SIGMA 10514 design)

==References==
{{Reflist|colwidth=30em}}

==External links==
{{Commons category|Sigma class corvette}}
* [http://www.naval-technology.com/projects/sigma-class-frigates-morocco/ SIGMA Class Frigates (FMMM), Morocco]
* [http://www.navyrecognition.com/index.php?option=com_content&task=view&id=791 SIGMA 10513 Tarik Ben Ziad Frigate – Royal Moroccan Navy]
* [http://www.navyrecognition.com/index.php?option=com_content&task=view&id=792 SIGMA 9813 Frigates Sultan Moulay Ismail & Allal Ben Abdellah – Royal Moroccan Navy]
* [http://www.navyrecognition.com/index.php?option=com_content&task=view&id=778 Sigma 10514 PKR Frigate – Indonesia Navy (TNI AL)]
* [http://www.navyrecognition.com/index.php?option=com_content&task=view&id=793 Commonality and similarity in DAMEN SIGMA designs]
* [http://www.damennaval.com/nl/company_product-range_sigma-corvettes-tni-al.htm SIGMA corvettes]
* [http://www.damennaval.com/nl/company_product-range_sigma-frigates-cmrm.htm SIGMA Frigate]
* [http://www.navyrecognition.com/index.php?option=com_content&task=view&id=750 SMART-S Mk2 Medium to Long Range (S-Band) Solid State Surveillance Radar]

{{DEFAULTSORT:Sigma Class Corvette}}
[[Category:Corvette classes]]
[[Category:Frigate classes]]
[[Category:Corvettes of the Netherlands]]
[[Category:Corvettes of the Indonesian Navy]]
[[Category:Corvettes of the Royal Moroccan Navy]]
[[Category:Ships built by Damen Shipyards Group]]