Engineering:NASM-SR

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Short description: Indian anti-ship missile system

NASM-SR
Westland Sea King test launching NASM-SR
TypeNaval anti-ship missile
Place of originIndia
Service history
In serviceUnder development
Production history
DesignerDefence Research and Development Organisation
ManufacturerAdani Defence & Aerospace
Specifications
Mass380 kg (840 lb)[1]
Length3.6 m (12 ft)
Diameter300 mm (12 in)
WarheadMulti-EFP,[2] PCB[3]
Warhead weight100 kg (220 lb)
Detonation
mechanism
Radio proximity fuze
EngineSolid-propellant rocket + ejectable booster and sustainer engine[4]
PropellantSolid fuel
Operational
range
55 km (34 mi)[5]
Flight altitude50m to 3km
SpeedMach 0.8[6]
Guidance
system
Mid-course: FOG-INS + radar altimeter and two-way datalink
Terminal: IIR[7]
Launch
platform
Westland Sea King,[8] MH-60R, HAL Dhruv

NASM–SR or Naval Anti-Ship Missile–Short Range is the first indigenous air-launched anti-ship missile being developed by the Defence Research and Development Organisation for the Indian Navy.[9] The missile is manufactured by Adani Defence & Aerospace under DcPP programme.[10][11]

NASM-SR features lock-on after launch with automatic target selection. The missile can strike in sea skimming and lofted trajectory mode. It supports fire-and-forget operation in all weather conditions, day or night. Re-targeting is available through two-way datalink (human-in-the-loop system).[12]

Development

Since 1980s, the Indian Navy has been using Sea Eagle anti-ship missile on its Westland Sea King Mk.42B multipurpose helicopter. The NASM-SR is intended as a replacement for the Sea Eagle missile which restricted flight range and increased take-off weight. The development of NASM-SR was made public for the first time in 2018 by the then Minister of Defence Nirmala Sitharaman. Fund of ₹436.06 crore (equivalent to ₹469 crore or US$66 million in 2023) for the development was also allocated in the same year.[9]

The missile is being developed by multiple DRDO labs including Research Centre Imarat, Defence Research and Development Laboratory, High Energy Materials Research Laboratory and Terminal Ballistics Research Laboratory.[13]

The NASM-SR can be easily adapted to launch from ships and land-based vehicles. DRDO is speculated to be developing a long range version of it for attacking land targets.[9] As the Sea King Helicopters are being phased out, the NASM-SR will be equipped on Indian Navy's newly acquired MH-60R naval helicopters.[14]

Design

The design and specifications of the new missile was revealed at the DefExpo 2020. The specification showed Mach 0.8 capable air launched anti-ship missile with a range of 55 km. The missile has an indigenous Imaging Infra-Red (IIR) seeker immune to jamming and state-of-the-art navigation system.[9]

As reported, the missile is equipped with indigenous fibre-optic gyroscope-based inertial navigation system (INS) and a radar altimeter for mid-course guidance, along with an integrated avionics module, electro-mechanical actuators for aerodynamic and jet vane control, thermal batteries, and a PCB warhead.[13][15]

The missile features human-in-the-loop system. It allows the pilot of the helicopter to launch the missile in bearing-only lock-on after launch mode towards a large target over a "specified zone of search" and later, in the terminal phase, locking onto a "smaller hidden target" (more precise target) improving the accuracy of the missile. The missile is also equipped high-bandwidth two-way datalink to relay live images from its seeker to the pilot for the in-flight retargeting. These features were operationally demonstrated in 2025.[15]

Testing

Maiden flight test of NASM-SR
  • Indian Navy successfully carried out the first test of the missile from a Sea King Mk.42B helicopter on 18 May 2022.[16] On maiden test firing, NASM-SR demonstrated its sea skimming capability and approaches the target at 5m above the sea level.[17] The maiden test was successful, and the missile is said to have reached the designated target with high degree of accuracy. It validated the control, guidance and mission algorithms.[18]
  • DRDO conducted successful guided flight trials of NASM-SR on 21 November 2023 in collaboration with Indian Navy.[19]
  • The NASM-SR missile was test fired by an Indian Naval SeaKing 42.B from Integrated Test Range, Chandipur, Odisha on 26 February 2025. The missile successfully hit a small ship target in sea skimming mode at maximum range. The missile deployed its indigenous IIR seeker for terminal guidance.[13][15]

See also

  • Sea Killer / Marte
  • Sea Venom (missile)
  • Sea Eagle (missile)
  • NASM-MR

References

  1. ↑ Udoshi, Rahul (19 May 2022). "India's naval anti-ship missile completes maiden flight test". Janes Information Services. janes.com. https://www.janes.com/osint-insights/defence-news/weapons/indias-naval-anti-ship-missile-completes-maiden-flight-test. 
  2. ↑ Singh, Dr. Manjit. "Ammunition Systems and Warhead Technologies". Defence Research and Development Organisation. https://www.drdo.gov.in/sites/default/files/technology-focus-documrnt/TF_Feb_2017_WEB.pdf. 
  3. ↑ Negi, Manjeet; Sharma, Shivani (26 February 2025). "India conducts flight trials of first-of-its-kind naval anti-ship missile". India Today. https://www.indiatoday.in/india/story/drdo-navy-naval-anti-ship-missile-test-odisha-nasam-sr-defence-2686091-2025-02-26. 
  4. ↑ Negi, Manjeet; Sharma, Shivani (26 February 2025). "India conducts flight trials of first-of-its-kind naval anti-ship missile". India Today. https://www.indiatoday.in/india/story/drdo-navy-naval-anti-ship-missile-test-odisha-nasam-sr-defence-2686091-2025-02-26. 
  5. ↑ Rahmat, Ridzwan (22 November 2023). "India carries out ‘guided flight trials' of indigenous anti-ship missile". Janes Information Services. janes.com. https://www.janes.com/osint-insights/defence-news/weapons/india-carries-out-guided-flight-trials-of-indigenous-anti-ship-missile. 
  6. ↑ Kadidal, Akhil; Tripathi, Bharat; Udoshi, Rahul (28 February 2025). "India tests anti-ship missile's features, datalink". Janes Information Services. janes.com. https://www.janes.com/osint-insights/defence-news/defence/india-tests-anti-ship-missiles-features-datalink. 
  7. ↑ "DRDO & Indian Navy successfully conduct flight-trials of first-of-its-kind Naval Anti-Ship missile". Ministry of Defence, Government of India. Press Information Bureau. 26 February 2025. https://pib.gov.in/PressReleaseIframePage.aspx?PRID=2106482. 
  8. ↑ "Naval Anti-Ship Missile (NASM)". https://www.globalsecurity.org/military/world/india/nasm-sr.htm. 
  9. ↑ 9.0 9.1 9.2 9.3 Paul George, Justin (18 May 2022). "Smaller, slower than BrahMos, but deadly: Why desi anti-ship missile matters" (in en). https://www.theweek.in/news/india/2022/05/18/smaller-slower-than-brahmos-but-deadly-why-desi-anti-ship-missile-matters.html. 
  10. ↑ "Missiles | Adani Defence & Aerospace". https://www.adanidefence.com/en/missiles. 
  11. ↑ Kadidal, Akhil; Tripathi, Bharat; Udoshi, Rahul (28 February 2025). "India tests anti-ship missile's features, datalink". Janes Information Services. janes.com. https://www.janes.com/osint-insights/defence-news/defence/india-tests-anti-ship-missiles-features-datalink. 
  12. ↑ "Missiles | Adani Defence & Aerospace". https://www.adanidefence.com/en/missiles. 
  13. ↑ 13.0 13.1 13.2 "DRDO & Indian Navy successfully conduct flight-trials of first-of-its-kind Naval Anti-Ship missile". Press Information Bureau. 2025-02-26. https://pib.gov.in/PressReleaseIframePage.aspx?PRID=2106482. 
  14. ↑ "Explained: Why the anti-ship missile tested by the Navy matters" (in en). 2022-05-21. https://indianexpress.com/article/explained/navy-anti-ship-missile-significance-explained-7928016/. 
  15. ↑ 15.0 15.1 15.2 Singh, Mayank (2025-02-26). "Indian Navy successfully tests first-of-its-kind NASM-SR missile with in-flight retargeting" (in en). https://www.newindianexpress.com/nation/2025/Feb/26/indian-navy-successfully-tests-first-of-its-kind-nasm-sr-missile-with-in-flight-retargeting. 
  16. ↑ "India tests indigenous anti-ship missile in a boost to self-reliance" (in en). 2022-05-19. https://www.hindustantimes.com/india-news/india-tests-indigenous-anti-ship-missile-in-a-boost-to-selfreliance-101652899484048.html. 
  17. ↑ Singh, Mayank (19 May 2022). "Air-launched anti-ship missile successfully tested". https://www.newindianexpress.com/nation/2022/may/19/air-launched-anti-ship-missile-successfully-tested-2455326.html. 
  18. ↑ "India successfully test-fires naval anti-ship missile" (in en-IN). The Hindu. 2022-05-18. ISSN 0971-751X. https://www.thehindu.com/news/national/indian-navy-successfully-test-fires-naval-anti-ship-missile/article65425605.ece. 
  19. ↑ "Indian Navy tests first indigenously developed ‘anti-ship missile’ | Watch" (in en). 2023-11-21. https://www.hindustantimes.com/india-news/indian-navy-tests-first-indigenously-developed-anti-ship-missile-watch-101700558255737.html. 

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