Sigma-class design explained

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. 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 91m (299feet) long with a beam of 13m (43feet), the SIGMA 10513 is 105m (344feet) in length again with a beam of 13m (43feet)

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

Versions

There are three types of Sigma combatants

Simplified comparisons between the different Sigma models.

+Comparisons between the different SIGMA models
Compact SIGMA 7310 [1] SIGMA 9113[2] SIGMA 9813[3] SIGMA 9814[4] [5] SIGMA 10513[6] SIGMA PKR 10514[7] [8] SIGMA 10514 POLASIGMA PES 10714CO[9] [10]
User
Vietnam People's Navy
Type Fast attack corvette Corvette Frigate Frigate Frigate Frigate Frigate (Long Range Patrol Vessel)Frigate
Length 74.2 meters90.01 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  kW 2 x 8.910 kW 2 x 8.910 kW tbd 2 x 8.910 kW 2 x 10.000 kW 2 x 13.410 kW 2 x 10.000 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 tbd28 knots 28 knots 28 knots 26 knots
Endurance 2,000  nmi 3,600 nmi 4,000 nmi tbd 4,000 nmi 5,000 nmi 5,000 nmi+ 8,200 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
Complement50 80 91 103 110 122 122 125
Helicopter
capabilities
none deck only deck and hangar
(9 ton)
deck and hangar deck and hangar
(9 ton)
deck and hangar
(10 ton)
deck and hangar
(10 ton)
deck and hangar
(10 ton)
StatusDesign conceptOperationalOperationalCancelled[11] 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.[12]

Users

Under construction

Under development

Potential operators

Failed bids

Indonesian Navy variants

SIGMA 9113

See main article: Diponegoro-class corvette. The Indonesian variant is based on the SIGMA 9113 design.[32] 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.[33]

Options for two other units were exercised in January 2006 with the first steel cut commenced on 3 April 2006[34] 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[35] 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.[36]

In 2019 the Diponegoro-class corvettes were upgraded with MM40 Exocet block III missile.[37]

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.[38]

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.[39] The corvettes will be updated with Thales TACTICOS Baseline 2 combat management system (CMS) and the Naval Smarter (NS) NS50 radar system.[40]

SIGMA 10514

See main article: Martadinata-class frigate. On the 16 August 2010, Indonesian Defense Ministry, signed a deal[41] [42] 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).[43]

As of December 2015, the first ship, KRI Raden Eddy Martadinata (331), was 85% complete and the ship was launched on 18 January 2016.[44] [45] [46] On 7 April 2017 the first ship, KRI Raden Eddy Martadinata (331), was commissioned at Tanjung Priok.[47] The second ship, KRI I Gusti Ngurah Rai (332), was commissioned on 10 January 2018.[48]

The class finally received their full complement of FFBNW system and equipment in December 2019 for KRI Raden Eddy Martadinata (331)[49] and March 2020 for KRI I Gusti Ngurah Rai (332).[50]

Moroccan Navy 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 10513, which are modified versions of the existing SIGMA-class design.[51]

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.[52]

The first frigate for Morocco, Tarik ben Ziyad, was launched in July 2010, began sea trials on 6 May 2011[53] and was delivered on 12 September 2011.[54] The second ship was launched on 2 February 2011,[55] with sea trials planned for late in the year.[53] The third ship was planned to be launched in September 2011.[53]

Mexican Navy variant

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[56] 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.[57]

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.[58]

Ships of the class

NamePennantBuilderLaid downLaunchedCommissionedNotes
SIGMA 9113 design
365Damen, Vlissingen24 March 200516 September 20065 July 2007Diponegoro, a National Hero from Central Java.
36624 March 200516 September 200624 November 2007Sultan Hasanuddin, a National Hero from South Sulawesi.
3678 May 200624 November 200718 October 2008Sultan Iskandar Muda, a National Hero from Aceh.
3688 May 200628 June 20087 March 2009Frans Kaisiepo, a National Hero from Papua and the fourth Governor of Papua province.
SIGMA 10514 design
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.
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.
SIGMA 10513 design
613Damen, VlissingenApril 200812 July 2010[59] 23 December 2011Now shows on AIS as Sultan Moulay Ismail.
SIGMA 9813 design
614Damen, VlissingenMarch 20092 February 2011[60] 10 March 2012[61]
615September 2009October 20118 September 2012[62]
SIGMA 10514 LROPV/POLA design
101Damen, Vlissingen
ASTIMAR 20, Salina Cruz
17 August 2017[63] 23 November 2018[64] 10 February 2020[65] ARM Benito Juárez (F 101) was formally named ARM Reformador (P 101) being renamed in March 2020.[66]

See also

External links

Notes and References

  1. http://products.damen.com/en/ranges/sigma-corvette/sigma-corvette-7310 "Sigma corvette 7310"
  2. http://products.damen.com/en/ranges/sigma-corvette/sigma-corvette-9113 "Sigma corvette 9113"
  3. Web site: 15 December 2012 . 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 . dead . https://archive.today/20130129144923/http://www.navyrecognition.com/index.php?option=com_content&task=view&id=792 . 2013-01-29 . 2016-01-19 . Navy Recognition.
  4. Web site: November 4, 2013 . Vietnam Navy selects MBDA Exocet and VL Mica missiles for its Sigma 9814 Corvettes . live . 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 . 2013-11-04 . 2016-01-19 . Navy Recognition.
  5. Web site: Design of future Damen SIGMA 9814 Corvettes for Vietnamese Navy revealed . March 1, 2014. Navy recognition . 2016-01-19.
  6. Web site: 14 December 2012 . 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 . dead . https://archive.today/20130208132058/http://www.navyrecognition.com/index.php?option=com_content&task=view&id=791 . 2013-02-08 . 2016-01-19 . Navy Recognition.
  7. Web site: 8 December 2012 . 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 . dead . https://archive.today/20130129180100/http://www.navyrecognition.com/index.php?option=com_content&task=view&id=778 . 2013-01-29 . 2016-01-19 . Navy recognition.
  8. Web site: PUSPEN . Markas Besar Tentara Nasional Indonesia . 8 April 2017 . Panglima TNI : KRI RE Martadinata-331 Perkuat Pertahanan dan Keamanan Laut Indonesia . TNI Commander: KRI RE Martadinata-331 Strengthens Indonesia's Maritime Defense and Security . live . https://archive.today/20240717131212/https://tni.mil.id/view-111322-panglima-tni-kri-re-martadinata-331-perkuat-pertahanan-dan-keamanan-laut-indonesia.html . 17 July 2024 . 17 July 2024 . Tentara Nasional Indonesia . id.
  9. Web site: Saumeth . Erich . 2 January 2024 . Las nuevas fragatas colombianas contarán con armamento francés, español, italiano y surcoreano . The new Colombian frigates will have French, Spanish, Italian and South Korean weapons . live . 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 . 2024-01-05 . 2024-04-25 . InfoDefensa . es.
  10. Web site: Saumeth . Erich . 5 January 2024 . Colombia apuesta por los sistemas de SAAB para sus nuevas fragatas . Colombia opts for SAAB systems for its new frigates . live . https://archive.today/20240717131558/https://www.infodefensa.com/texto-diario/mostrar/4670129/004-colombia-colombia-apuesta-sistemas-saab-nuevas-fragatas . 2024-07-17 . 2024-04-25 . InfoDefensa . es.
  11. Web site: Vietnam's Quest for a Greenwater Navy . 2016-03-18 . The diplomat.
  12. Web site: Damen introduced the new "Compact Sigma" line of corvettes during DSEI 2013 . live . 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 . 2015-04-15 . 2016-01-19 . Navy Recognition.
  13. Web site: Higuera . José . 6 January 2023 . Shipbuilders near and far line up for Latin American naval upgrades . live . 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/ . 17 July 2024 . 17 July 2024 . Defense News.
  14. Web site: Cookies op pzc.nl - pzc.nl . dead . https://web.archive.org/web/20170414125709/http://www.pzc.nl/zeeuws-nieuws/mexicaanse-order-voor-damen-schelde~a366dfc5/ . 14 April 2017 . 27 December 2017 . www.pzc.nl.
  15. Web site: InfoDefensa . Revista Defensa . Damen construirá las cinco fragatas del programa PES de Colombia . Damen to build five frigates for Colombia's PES programme . live . https://archive.today/20240717132228/https://www.infodefensa.com/texto-diario/mostrar/3900005/damen-construira-cinco-fragatas-programa-pes-colombia . 17 July 2024 . 17 July 2024 . InfoDefensa . es.
  16. Web site: Colombian Navy awards contract to COTECMAR for first PES frigate, ocean patrol vessel, and logistic support ship . live . 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 . 2024-07-17 . 2023-01-15 . Janes . en.
  17. Web site: Saumeth . Erich . 1 April 2024 . Colombia, enredada en la construcción de sus futuras fragatas . Colombia, entangled in the construction of its future frigates . live . https://archive.today/20240401161656/https://www.infodefensa.com/texto-diario/mostrar/4775305/063-primicia-colombia-problemas-construccion-futuras-fragatas . 2024-04-01 . 2024-04-25 . InfoDefensa . es.
  18. Web site: Williams . Lachlan . 2024-04-02 . Colombia's Frigate Project Faces Obstacles . subscription . 2024-04-25 . The Rio Times . en-US.
  19. Web site: 14 November 2021 . Dutch shipyard DAMEN submits its SIGMA 10514 frigate for Hellenic Navy program . live . https://archive.today/20240717135433/https://www.armyrecognition.com/news/navy-news/2021/dutch-shipyard-damen-submits-its-sigma-10514-frigate-for-hellenic-navy-program . 17 July 2024 . 17 July 2024 . Navy Recognition.
  20. Web site: 6 April 2022 . DSA 2022: Damen showcases Sigma 9113 LMS corvette . live . https://archive.today/20240717135706/https://www.armyrecognition.com/news/navy-news/2022/dsa-2022-damen-showcases-sigma-9113-lms-corvette . 17 July 2024 . 17 July 2024 . Navy Recognition.
  21. Web site: 2017-05-26 . Damen apuesta a su serie Sigma para el mercado naval latinoamericano . Damen bets on its Sigma series for the Latin American naval market . live . https://archive.today/20240717135958/https://www.infodefensa.com/texto-diario/mostrar/3076338/damen-apuesta-serie-sigma-mercado-naval-latinoamericano . 17 July 2024 . 10 February 2018 . InfoDefensa . es.
  22. Web site: 21 June 2016 . Balt Military Expo 2016: DAMEN Unveils SIGMA 10514PL Designs Based on SIGMA 10514 PKR . live . https://web.archive.org/web/20170415012814/http://www.navyrecognition.com/index.php?option=com_content&view=article&id=4104 . 15 April 2017 . 27 December 2017 . Navy Recognition.
  23. News: 15 October 2018 . Marinha do Brasil divulga short-list do Projeto classe Tamandaré . Brazilian Navy releases shortlist for 'Tamandaré' class Project . Poder Naval . pt.
  24. News: Projeto Classe Tamandaré Marinha do Brasil seleciona a melhor oferta. 28 March 2019. Marinha do Brasil. pt.
  25. Web site: Egyptian Navy would be about to order 4 to 6 Gowind Combat Corvettes from DCNS . 2016-01-19 . Navyrecognition.com. 5 March 2014 .
  26. Web site: Navy ignored on littoral combat ships, RM1b cost overruns - PAC report. 4 August 2022 .
  27. Web site: 2018-02-09 . Romania to buy 3 sub, 4 ships to bolster Black Sea ops . 11 February 2018 . DefenseNews . en.
  28. Web site: România cumpără 4 corvete noi, pe care Olanda le va fabrica la Galaţi. Cât costă navele şi de ce are România nevoie de ele . 11 February 2018 . Gandul . ro.
  29. Web site: 2017-08-21 . Romania's Naval Forces at crossroads . dead . https://web.archive.org/web/20180212005134/http://www.romaniajournal.ro/defence-ministry-to-buy-4-corvettes-by-2024-in-a-eur-1-6bn-investment/ . 12 February 2018 . 11 February 2018 . Romania Energy Center . en . dmy-all.
  30. Web site: Defence Ministry to buy 4 corvettes by 2024 in a EUR 1.6bn investment . 11 February 2018 . The Romania Journal . en.
  31. Web site: Eshel . Tamir . 2011-10-23 . Vietnam Negotiate Buying four Sigma Corvettes from the Netherlands . 2022-08-16 . Defense Update . en-US.
  32. Web site: Indonesian Specifications of the Sigma Class coverttes. Schelde shipbuilding . 2016-01-19 . dead. https://web.archive.org/web/20110928162530/http://www.scheldeshipbuilding.com/sigmacorvette.htm. 2011-09-28.
  33. Web site: Navy chief takes delivery of corvette made in Netherlands . Antara . . 2016-01-19 . dead. 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/. 2009-04-10.
  34. Web site: Two Sigma 9113 corvettes more for Indonesia . dead . https://web.archive.org/web/20061001005953/http://www.damen.nl/Upload/Downloads/mID_5708_cID_4719_DAMEN-NEWS-7-LR.pdf . October 1, 2006 .
  35. Web site: JMR: Indonesia evaluates C-802. Jane's . 2016-01-19.
  36. Web site: Indonesian Navy Upgrades Corvette with Thales' Kingklip Sonar . 2022-11-30 . Thales Group . 31 July 2018 . en.
  37. Web site: Indonesia conducts first firing of Exocet MM40 Block 3 from SIGMA corvette . 2022-08-16 . Janes.com . en.
  38. Web site: Terma signs 2 new naval contracts in Indonesia . 2022-11-30 . Terma . en-US.
  39. Web site: Thales Strengthens its Leading Position in the Indonesian Defence Industry . 2022-11-22 . Thales Group . 4 November 2022 . en.
  40. Web site: Thales, PT Len to upgrade Indonesian corvettes . 2022-11-22 . Janes.com . en.
  41. Web site: JNR: Indonesia selects Damen for frigate contract. Jane's . 2016-01-19.
  42. Web site: Damen Schelde Naval Shipbuilding . 2016-01-19.
  43. Web site: Scott . Richard . 17 November 2016 . Negotiations under way on additional equipment package for Indonesia's PKR frigate . dead . https://web.archive.org/web/20161118134452/http://www.janes.com/article/65579/negotiations-under-way-on-additional-equipment-package-for-indonesia-s-pkr-frigate . 18 November 2016 . janes.com.
  44. Web site: Thales to supply mission suite for Indonesian Navy (TNI-AL) PKR vessels . November 18, 2013. Navy recognition . 2016-01-19.
  45. Web site: Damen (DSNS) starts steel cutting for Sigma 10514 PKR Frigate for Indonesia Navy (TNI AL) . January 15, 2014. Navy recognition . 2016-01-19.
  46. Web site: Damen Schelde Naval Shipbuilding lays keel of first Sigma 10514 PKR Frigate for TNI AL (Indonesia) . April 19, 2014 . Navy recognition . 2016-01-19.
  47. Web site: Rahmat . Ridzwan . Indonesia commissions first Martadinata-class guided-missile frigate . 9 May 2017 . IHS Jane's 360.
  48. Web site: Indonesia commissions second Martadinata-class frigate . dead . https://web.archive.org/web/20180111170704/http://www.janes.com/article/76971/indonesia-commissions-second-martadinata-class-frigate . 11 January 2018 . 11 January 2018 . Jane's 360 . dmy-all.
  49. Web site: Damen completes combat systems installation & trials on Indonesian guided missile frigate . 2022-08-16 . archive.damen.com.
  50. Web site: Damen completes combat systems installation and trials on second Indonesian guided missile frigate . 2022-08-16 . archive.damen.com.
  51. News: Joris Janssen Lok . 8 February 2008 . Morocco's Dutch Frigate Order is Confirmed . . 8 February 2008 . 21 May 2011 . 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 . dead .
  52. Web site: Frank van de Wiel . 7 April 2008 . Thales awarded contract for Moroccan OPV . dead . 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 . April 13, 2008 . Thales Nederland.
  53. Web site: First Multi Mission Frigate for Royal Moroccan Navy Starts Sea Trials. Shipbuilding Tribune. 2 October 2011. https://web.archive.org/web/20110811053106/http://shipbuildingtribune.com/2011/05/12/first-multi-mission-frigate-for-royal-moroccan-navy-finishes-sea-trials/. 11 August 2011. 12 May 2011. dead.
  54. Web site: Damen Schelde Naval Shipbuilding Delivers SIGMA Class Frigate to Royal Moroccan Navy. Shipbuilding Tribune. 2 October 2011. https://web.archive.org/web/20120331191504/http://shipbuildingtribune.com/2011/09/12/damen-schelde-naval-shipbuilding-delivers-sigma-class-frigate-to-royal-moroccan-navy/. 31 March 2012. 12 September 2011. dead.
  55. Web site: The Netherlands: Second Multi-Mission Frigate Launches at Damen Shipyard for Moroccan Navy. Shipbuilding Tribune. 2 October 2011. 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/. 14 August 2011. 4 March 2011. dead.
  56. Web site: Mexico to acquire Evolved SeaSparrow Missiles | Jane's 360. www.janes.com.
  57. DSCA Major Arms Sales News Release. DSCA. 5 January 2018. 6 January 2018.
  58. Web site: Mexican Navy long-range OPV getting Indra's RIGEL electronic defense system. Naval Today. 18 April 2018. 18 April 2018.
  59. Web site: News – Damen Schelde Naval Shipbuilding . Damennaval.com . 2010-07-18 . 2011-12-28.
  60. Web site: News – Damen Schelde Naval Shipbuilding . 2011-12-28 . Damennaval.com.
  61. Web site: 2012-03-14 . Moroccan Navy receives second Sigma-class frigate . Naval Technology.
  62. Web site: 2012-09-12 . Moroccan Navy commissions its third SIGMA-class frigate . Naval Technology.
  63. La Secretaría de Marina - Armada de México impulsa la Industria Naval con la Patrulla Oceánica de Largo Alcance (Pola). SEMAR. es. 17 August 2017. 18 August 2017.
  64. SEMAR conmemora el "Día de la Armada de México" con la botadura y abanderamiento de la primera Patrulla Oceánica de Largo Alcance. SEMAR. es. 23 November 2018. 25 November 2018.
  65. Web site: Damen delivers Long Range Ocean Patrol Vessel to the Mexican Navy . 2022-08-16 . archive.damen.com.
  66. Web site: Defensa.com . 2020-05-13 . 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 . 2022-08-16 . Defensa.com . es.