Engineering:INS Aridhaman

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Short description: Arihant-class nuclear submarine

A conceptual drawing representing the Arihant Stretch design
History
India
NameINS Aridaman
BuilderShipbuilding Centre (SBC), Visakhapatnam, India[1]
Laid down2018[2]
Launched23 November 2021[3]
Commissioned3 April 2026[4]
StatusActive
__1B0X_5H1P__career
General characteristics
Class & typeArihant-class ballistic missile submarine
TypeBallistic missile submarine
Displacement7,000 tonnes
Length130 m
Beam11 m
Draft9.5 m
Installed power1 x CLWR-B1 Compact Light-water reactor,[5][6] 83 MW[7]
Propulsion1 × propeller shaft, nuclear propulsion
SpeedSurfaced: 12–15 knots (22–28 km/h) Submerged: 24 knots (44 km/h)
RangeUnlimited except by food supplies
EnduranceUnlimited except by food supply and maintenance
Test depthBetween 300 m (980 ft) to 400 m (1,300 ft)[8]
Sensors &
processing systems
  • USHUS sonar
  • Panchendriya unified submarine sonar, control system and underwater communication system [9]
__1B0X_5H1P__characteristics

INS Aridhaman (SSBN 82) (lit. Vanquisher of Foes) is a nuclear-powered ballistic missile submarine, and the third of the Indian Navy's Arihant-class submarine. It is designated S4 Strategic Strike Nuclear Submarine. The 7,000-tonne vessel was built under the Advanced Technology Vessel (ATV) project at the Ship Building Centre in the port city of Visakhapatnam. It is an upgraded variant of the Arihant-class submarine.[10][11][12]

Description

The boat will have one seven-blade propeller powered by a Compact Light Water Reactor (CLWR). It can achieve a maximum speed of 12–15 knots (22–28 km/h) when on surface and 24 knots (44 km/h) when submerged.[13][14][15] The CLWR is an upgraded form of the one that powers INS Arihant. The CLWR has exceptionally lower acoustic signature than the previous generation making it harder to detect by enemy vessels along with longer endurance.[16]

The submarine has eight VLS tubes in its hump, as compared to four on her predecessors—INS Arihant, the lead ship of the class, and INS Arighaat. She can carry up to 24 K-15 Sagarika missiles (each with a range of 750 km or 470 mi), eight K-4 missiles (with a range of 3,500 km or 2,200 mi) or K-5 missiles (with range of 6,000 km or 3,700 mi).[7][17][18]

Construction and career

INS Aridhaman was launched on 23 November 2021.[3] As of February 2025, the submarine was undergoing trials and was expected to be commissioned in 2025 itself.[19]

On 2 December 2025, the Navy chief, Admiral Dinesh K Tripathi, announced that the submarine had entered the final stages of trials and would be commissioned soon.[20] By late December, the boat had completed sea trials.[21] On 19 February 2026, an NDTV report indicated that the submarine is ready for induction between April and May in the year.[22][23]

The submarine was commissioned on 3 April 2026 by the Defence Minister, Rajnath Singh.[4][24]

See also

References

  1. ↑ S. Anandan (14 January 2012). "Second nuclear submarine headed for year-end launch". The Hindu. http://www.thehindu.com/news/national/second-nuclear-submarine-headed-for-yearend-launch/article2798864.ece. 
  2. ↑ "A bigger nuclear submarine is coming". The Hindu. 2017. https://www.thehindu.com/news/national/a-bigger-nuclear-submarine-is-coming/article19862549.ece. 
  3. ↑ 3.0 3.1 "India Quietly Launches 3rd Arihant-class Nuclear-powered Submarine, Can Carry 8 Ballistic Missiles: Report" (in en). News18. 2021-12-31. https://www.news18.com/news/india/india-quietly-launches-3rd-arihant-class-nuclear-powered-submarine-can-carry-8-ballistic-missiles-report-4610366.html. 
  4. ↑ 4.0 4.1 Philip, Snehesh Alex (2026-04-03). "India commissions its third nuclear ballistic missile submarine—INS Aridhaman" (in en-US). https://theprint.in/defence/india-commissions-its-third-nuclear-powered-ballistic-missile-submarine-ins-aridhaman/2895692/. 
  5. ↑ "Founder's Day Speech, Director, BARC". Bhabha Atomic Research Centre. 30 October 2018. http://www.barc.gov.in/presentations/fddir18.pdf. 
  6. ↑ "DAE Excellence in Science, Engineering & Technology Awards 2010". BARC Newsletter (322): 33. September–October 2011. http://www.barc.gov.in/publications/nl/2011/2011091009.pdf. Retrieved 21 March 2021. 
  7. ↑ 7.0 7.1 "A peek into India's top secret and costliest defence project, nuclear submarines". India Today. 7 December 2017. https://www.indiatoday.in/magazine/the-big-story/story/20171218-india-ballistic-missile-submarine-k-6-submarine-launched-drdo-1102085-2017-12-10. 
  8. ↑ "Arihant-class Asfaq submarines". http://www.defencenews.in/defence-news-internal.aspx?get=new&id=R5mr0CLjcww=. 
  9. ↑ "Retrieved on 2016-10-21.". http://www.naval-technology.com/projects/arihant-class/. 
  10. ↑ "Needed, a nuclear triad". Sunday-guardian.com. http://www.sunday-guardian.com/analysis/needed-a-nuclear-triad. 
  11. ↑ General, Lt. "Indian Navy's Capability Perspective – SP's Naval Forces". Spsnavalforces.net. http://www.spsnavalforces.net/story.asp?mid=23&id=3. 
  12. ↑ "India To Construct Two More Arihant Nuclear Submarines For Navy". Defence Now. 28 February 2012. http://www.defencenow.com/news/551/india-to-construct-two-more-arihant-nuclear-submarines-for-navy.html. 
  13. ↑ "SSBN Arihant Class Submarine, India". naval-technology.com. http://www.naval-technology.com/projects/arihant-class/. 
  14. ↑ "INS Arighaat: How a second nuclear submarine boosts India’s strategic reach" (in en). 31 August 2024. https://www.indiatoday.in/india/story/ins-arighaat-how-a-second-nuclear-submarine-boosts-indias-strategic-reach-2591300-2024-08-31. 
  15. ↑ "India to commission second Arihant-class submarine in 2021" (in en). 22 December 2020. https://www.janes.com/osint-insights/defence-news/india-to-commission-second-arihant-class-submarine-in-2021. 
  16. ↑ "How Refined 83 MW PWR on INS Arighat Boosts its Stealth and Endurance Compared to INS Arihant" (in en-US). 8 September 2024. https://defence.in/threads/how-refined-83-mw-pwr-on-ins-arighat-boosts-its-stealth-and-endurance-compared-to-ins-arihant.9797/. 
  17. ↑ "INS Arihant returned yesterday from 20-day deterrent patrol" (in en). 5 November 2018. https://www.indiatoday.in/india/story/ins-arihant-returned-yesterday-from-20-day-deterrent-patrol-1383188-2018-11-05. 
  18. ↑ "'Nuclear-capable ballistic missile tested from INS Arighaat'". The Times of India. 2024-11-28. ISSN 0971-8257. https://timesofindia.indiatimes.com/india/nuclear-capable-ballistic-missile-tested-from-ins-arighaat/articleshow/115747030.cms. 
  19. ↑ "Third Indian N-powered ballistic missile submarine to be inducted this year". Deccan Herald. 3 February 2025. https://www.deccanherald.com/india/third-indian-n-powered-ballistic-missile-submarine-to-be-inducted-this-year-3387338. 
  20. ↑ Sharma, Shivani; Negi, Manjeet (2025-12-02). "Navy to get INS Aridhaman, third Indian-made nuclear submarine" (in en). https://www.indiatoday.in/india/story/ins-aridaman-third-indian-made-nuclear-submarine-to-be-commissioned-soon-navy-chief-2829303-2025-12-02. 
  21. ↑ "CHAKRA EXCLUSIVE: India's fourth SSBN sails out for sea trials" (in en). 2025-12-29. https://chakranewz.com/critical-technologies/trending/chakra-exclusive-india-rsquo-s-fourth-ssbn-sails-out-for-sea-trials. 
  22. ↑ "India's 3rd Nuclear Ballistic Missile Submarine To Enter Service Soon". NDTV. 19 February 2026. https://www.ndtv.com/india-news/indias-3rd-nuclear-ballistic-missile-submarine-ins-aridhaman-to-enter-service-in-april-may-2026-11070962/. 
  23. ↑ "India’s third nuclear ballistic submarine set for induction: Why INS Aridhaman matters". Moneycontrol. 19 February 2026. https://www.moneycontrol.com/news/india/india-s-third-nuclear-ballistic-submarine-set-for-induction-why-ins-aridhaman-matters-13836156.html. 
  24. ↑ "Bigger, quieter and deadlier: Navy commissions INS Aridhaman - all about India's 3rd nuclear sub - The Times of India". The Times of India. 2026-04-03. ISSN 0971-8257. https://timesofindia.indiatimes.com/defence/news/bigger-quieter-and-deadlier-navy-commissions-ins-aridhaman-all-about-indias-3rd-nuclear-sub/articleshow/130000699.cms. 

See also



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