Engineering:Nagapasa-class submarine

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Short description: Submarine class
Submarine KRI Nagapasa, Indonesian Navy.jpg
KRI Nagapasa (403)
Class overview
Name: Nagapasa class
Builders:
  • Daewoo Shipbuilding & Marine Engineering[1]
  • PT PAL[2]
Operators:  Indonesia Navy
Preceded by: Cakra class
Cost:
  • $373M[3] per vessel (Batch-1 Nagapasa-class, 2011 April)
  • $340M[4] per vessel (Batch-2 Nagapasa-class, 2019 December)
In commission: 2017–present
Planned: 6 [5]
On order: 3
Completed: 3
Active: 3
General characteristics
Type: Attack submarine
Displacement: 1,400 tons (surfaced)
Length: 61.3 m (201 ft 1 in)
Beam: 6.3 m (20 ft 8 in)
Draft: 5.5 m (18 ft 1 in)
Propulsion:
  • 4 x MTU 12V493 diesel generators
  • 3,700 kW (5,000 shp)
Speed:
  • 11 knots (20 km/h; 13 mph) surfaced
  • 21.5 knots (39.8 km/h; 24.7 mph) submerged
Range:
  • 11,000 nmi (20,000 km; 13,000 mi) at 10 kn (19 km/h; 12 mph) surfaced,
  • 8,000 nmi (15,000 km; 9,200 mi) at 10 kn (19 km/h; 12 mph) snorkeling,
  • 400 nmi (740 km; 460 mi) at 4 kn (7.4 km/h; 4.6 mph), submerged
Endurance: 50 days
Test depth: 500 m (1,600 ft)
Complement: more than 40[6]
Sensors and
processing systems:
  • Kongsberg MSI-90U Mk 2 combat management system
  • Atlas Elektronik CSU-90 active and passive sonar
  • ELAC KaleidoScope sonar suite 
  • Flank sonar arrays
  • Pegasso RESM system
  • Aries radar
  • ECPINS-W integrating navigation and tactical systems 
  • L3's MAPPS integrated platform management system
  • Safran's Sigma 40XP inertial navigation systems
  • Hensoldt SERO 400 & OMS 100 periscope
  • ZOKA acoustic torpedo countermeasures 
Armament:
  • 8 × 533 mm (21 in) torpedo tubes
  • 14 Black Shark torpedoes

The Nagapasa class is an upgraded variant of the Jang Bogo class, also known as Improved Chang Bogo. The vessels were built by the South Korean Daewoo Shipbuilding & Marine Engineering (DSME) and the Indonesian PT PAL. As of 2021, six ships have been planned, which were divided into two batches. Batch 1 consists of three ships and all are already commissioned. Batch 2 also consists of three ships that are in the early development stage.[7] The class is named for weapon of Indrajit, Nagapash (Sanskrit: नागपाश, romanized: nāgapāśa, lit. 'serpent rope').

Development

In December 2011, DSME won a contract to build three 1,400-ton Chang Bogo-class submarines for Indonesia at a cost of $1.07 billion.[8] Construction of the submarines started in January 2012 for delivery by 2015 and 2016, and for commissioning in the first half of 2018. They are equipped with torpedoes and guided missiles.[9][10] The submarines were described to be Korea's original model, bigger and more advanced than Indonesia's refurbished Type 209/1300.[3] Initially the offered submarines were going to be in-service Republic of Korea Navy submarines.[11] The sale will be done without the involvement of German companies.[12] South Korea was the only country outside Germany independently offering the Type 209 submarine for sale. Indonesia was also offered two license-built Type 209 submarines manufactured by a group of Turkish (SSM - Undersecretariat for Defense Industries) and German companies (HDW/ThyssenKrupp), a deal reported to be valued at $1 billion.[13] SSM was also offering the leases of Type 209 submarines until new submarines could be completed.[12] The offer has since been superseded by the DSME submarine contract. In early 2012, the Korean defense firm LIG Nex1 exhibited its latest suite of indigenously developed submarine sensors, submarine combat systems, and heavy-weight torpedoes and wire-guided torpedoes in Indonesia for potential use by the Indonesian Navy's submarine forces.[14] These submarines are equipped with Wartsila ELAC LOPAS Sonar and flank sonar arrays, Indra's Pegaso RESM system and Aries low-probability of intercept radar,[15] L3's MAPPS integrated platform management systems[16] and Safran's Sigma 40XP inertial navigation systems.[17]

In 2019, South Korea signed another contract worth US$1.02 billion to sell three 1,400-ton submarines to Indonesia[4] and would be supported through a loan agreement.[18] However, the Indonesian government was reconsidering the contract (As of April 2020).[19]

Operational history

KRI Nagapasa was commissioned by Indonesian Minister of Defense Ryamizard Ryacudu in South Korea on 2 August 2017. Afterwards, the submarine sailed to Surabaya, where she was received by Chief of Staff of the Navy Ade Supandi on 28 August 2017.[20] Her name is based on the Nagapasha, a mythical weapon in the Ramayana.[21] Nagapasa was then assigned to the Indonesian Navy Eastern Command (Koarmatim).[22]

KRI Ardadedali was delivered and commissioned in a ceremony at DSME's shipyard in Okpo, Geoje on 25 April 2018, before sailing to its base in Surabaya.[23] She was attached to the Indonesian Navy's 2nd Fleet Command, based in Surabaya.[24] Her name Ardadedali was based on an arrow in possession of Arjuna in the Mahabharata epic.[25]

KRI Alugoro was delivered to the navy on 17 March 2021[26] and commissioned in a ceremony at naval base in Ranai, Natuna Island on 6 April 2021.[27] She was assigned to Navy's 2nd Fleet Command.[28] Her name is based on the gada (mace)'s of Baladewa in the Mahabharata epic. Her name was previously used by a Whiskey-class submarine in 1960s, RI Alugoro (406).[29]

Boats in class

Name Hull number Builder Ordered Laid down Launched Commissioned Status
Batch I
Nagapasa 403 DSME 21 December 2011 9 April 2015 24 March 2016 2 August 2017 In active service
Ardadedali 404 DSME 21 December 2011 2014 24 October 2016 25 April 2018 In active service
Alugoro 405 DSME, PT PAL 21 December 2011 2016 11 April 2019 6 April 2021 In active service
Batch II
TBD DSME, PT PAL 12 April 2019 On order[30]
TBD PT PAL 12 April 2019 On order
TBD PT PAL 12 April 2019 On order

See also

  • List of active Indonesian Navy ships
  • Equipment of the Indonesian Navy

References

  1. ↑ Wertheim, Eric (2007). Naval Institute Guide to Combat Fleets of the World: Their Ships, Aircraft, and Systems (Naval Institute Guide to Combat Fleets of the World). US Naval Institute Press. p. 1067. ISBN 978-1-59114-955-2. 
  2. ↑ Franz-Stefan Gady (2016-03-29). "South Korea Launches First Indonesian Stealth Submarine". The Diplomat. https://thediplomat.com/2016/03/south-korea-launches-first-indonesian-stealth-submarine/. 
  3. ↑ 3.0 3.1 "Korea wins $1 bil. Indonesian deal". Korea Times. December 20, 2011. https://www.koreatimes.co.kr/www/tech/2021/04/693_101248.html. 
  4. ↑ 4.0 4.1 "S. Korea signs contract to export 3 submarines to Indonesia". Yonhap News Agency. 12 April 2019. https://en.yna.co.kr/view/AEN20190412004800315. 
  5. ↑ Rahwat, Ridzwan (12 April 2019). "Indonesia signs USD1 billion contract for three follow-on SSKs to Nagapasa class". Jane's 360. https://www.janes.com/article/87861/indonesia-signs-usd1-billion-contract-for-three-follow-on-ssks-to-nagapasa-class. 
  6. ↑ Vavasseur, Xavier (August 9, 2019). "First Indonesian-Built Submarine to Soon Reinforce TNI AL Fleet". Naval News. https://www.navalnews.com/naval-news/2019/08/first-indonesian-built-submarine-to-soon-reinforce-tni-al-fleet/. 
  7. ↑ Gady, Franz-Stefan (15 April 2019). "Indonesia, South Korea Ink $1 Billion Contract for 3 Diesel-Electric Submarines". The Diplomat. https://thediplomat.com/2019/04/indonesia-south-korea-ink-1-billion-contract-for-3-diesel-electric-submarines/. 
  8. ↑ Post, The Jakarta. "RI orders 3 submarines worth $1b in regional 'catch-up'". http://www.thejakartapost.com/news/2011/12/22/ri-orders-3-submarines-worth-1b-regional-catch.html. 
  9. ↑ "South Korea Exports Submarines to Indonesia". http://www.defensenews.com/story.php?i=8625583&c=ASI&s=SEA. 
  10. ↑ "Sagem navigation system selected by DSME of South Korea for Indonesian submarines". November 25, 2013. http://www.navyrecognition.com/index.php/news/defence-news/year-2013-news/november-2013-navy-naval-forces-maritime-industry-technology-security-global-news/1371-sagem-navigation-system-selected-by-dsme-of-south-korea-for-indonesian-submarines-.html. 
  11. ↑ "Defense & Security Intelligence & Analysis: IHS Jane's - IHS". http://articles.janes.com/articles/Janes-Defence-Weekly-2008/Indonesia-South-Korea-consider-submarine-and-aircraft-exchange.html. 
  12. ↑ 12.0 12.1 "Hürriyet Daily News". http://www.hurriyetdailynews.com/n.php?n=turkey-germany-seek-submarine-sale-of-1-bln-2011-08-26. 
  13. ↑ "Hürriyet Daily News". http://www.hurriyetdailynews.com/n.php?n=turkey-denies-losing-deal-for-indonesian-navy-submarines-2011-10-26. 
  14. ↑ Batik Photography (18 January 2012). "Presentasi LIG Nex1.mp4". https://www.youtube.com/watch?v=Vlpq8u_P1Kk. 
  15. ↑ "Indra to implement its technology in Indonesia's type 209 submarines for more than €10M | Indra". http://www.indracompany.com/en/noticia/indra-to-implement-its-technology-in-indonesias-type-209-submarines-for-more-than-10m. 
  16. ↑ "Archived copy". http://www.mapps.l-3com.com/newsletters/MCN22.pdf. 
  17. ↑ "Sagem navigation system selected by DSME of South Korea for Indonesian submarines". 25 November 2013. http://www.navyrecognition.com/index.php?option=com_content&task=view&id=1371. 
  18. ↑ "DSME to deliver three more submarines to Indonesia | Jane's 360". Janes360. 12 April 2019. https://www.janes.com/article/87858/dsme-to-deliver-three-more-submarines-to-indonesia. 
  19. ↑ Dominguez, Gabriel (18 March 2021). "Indonesian Navy receives first-ever locally assembled submarine" (in en). https://www.janes.com/defence-news/news-detail/indonesian-navy-receives-first-ever-locally-assembled-submarine. 
  20. ↑ "TNI AL Resmi Menambah Kapal Selam Terbaru" (in id). JPNN. 28 August 2017. https://www.jpnn.com/news/tni-al-resmi-menambah-kapal-selam-terbaru. 
  21. ↑ "Ini Harga dan Kisah di Balik Nama KRI Nagapasa-403" (in id). Jawa Pos. 28 August 2017. https://www.jawapos.com/nasional/hankam/28/08/2017/ini-harga-dan-kisah-di-balik-nama-kri-nagapasa-403/. 
  22. ↑ "Ini Alasan KRI Nagapasa-403 Ditempatkan di Armatim" (in id). Jawa Pos. 28 August 2017. https://www.jawapos.com/nasional/hankam/28/08/2017/ini-alasan-kri-nagapasa-403-ditempatkan-di-armatim/. 
  23. ↑ "Indonesia receives second DSME-built submarine KRI Ardadedali". Naval Today. 18 September 2019. https://navaltoday.com/2018/04/25/indonesia-receives-second-dsme-built-submarine-kri-ardadedali/. 
  24. ↑ "KRI Ardadedali-404 Perkuat Armada II" (in id). Berita Satu. 17 May 2018. https://www.beritasatu.com/nasional/492829/kri-ardadedali404-perkuat-armada-ii. 
  25. ↑ Agiesta, Fellyanda Suci (28 May 2018). "Mengupas KRI Ardadedali, kapal selam sakti milik TNI AL" (in id). Merdeka. https://www.merdeka.com/peristiwa/mengupas-kri-ardadedali-kapal-selam-sakti-milik-tni-al.html. 
  26. ↑ "Indonesian Navy receives first-ever locally assembled submarine". 18 March 2021. https://www.janes.com/defence-news/news-detail/indonesian-navy-receives-first-ever-locally-assembled-submarine. 
  27. ↑ "KRI Alugoro-405 Resmi Masuk Satuan Kapal Selam Koarmada II TNI AL". 6 April 2021. https://nasional.kompas.com/read/2021/04/06/16535601/kri-alugoro-405-resmi-masuk-satuan-kapal-selam-koarmada-ii-tni-al. 
  28. ↑ "KRI Alugoro-405 Resmi Masuk Jajaran Satuan Kapal Selam Koarmada II". 6 April 2021. http://kominfo.jatimprov.go.id/read/umum/kri-alugoro-405-resmi-masuk-jajaran-satuan-kapal-selam-koarmada-ii. 
  29. ↑ "Ini Alasan Kapal Selam Pertama Produksi Anak Bangsa Diberi Nama KRI Alugoro-405". 11 April 2019. https://regional.kompas.com/read/2019/04/11/18112151/ini-alasan-kapal-selam-pertama-produksi-anak-bangsa-diberi-nama-kri-alugoro. 
  30. ↑ Gady, Franz-Stefan. "Indonesia Is Reconsidering Contract With South Korea for 3 Diesel-Electric Submarines". The Diplomat. https://thediplomat.com/2020/04/indonesia-is-reconsidering-contract-with-south-korea-for-3-diesel-electric-submarines/. 



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