NASM-SR explained

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 for the development was also allocated in the same year.

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. 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.

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.^[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.

Testing

• 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.

See also

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

External links

General:

• Technology Focus : Ammunition Systems and Warhead Technologies, Defence Research and Development Organisation

Notes and References

1. News: Negi . Manjeet . Sharma . Shivani . India conducts flight trials of first-of-its-kind naval anti-ship missile . 1 March 2025 . India Today . 26 February 2025.
2. News: Udoshi . Rahul . India's naval anti-ship missile completes maiden flight test . 2 March 2025 . Janes Information Services . janes.com . 19 May 2022.
3. Web site: Singh . Dr. Manjit . Ammunition Systems and Warhead Technologies . Technology Focus . Defence Research and Development Organisation . 20 May 2022.
4. News: Negi . Manjeet . Sharma . Shivani . India conducts flight trials of first-of-its-kind naval anti-ship missile . 1 March 2025 . India Today . 26 February 2025.
5. News: Rahmat . Ridzwan . India carries out ‘guided flight trials' of indigenous anti-ship missile . 2 March 2025 . Janes Information Services . janes.com . 22 November 2023.
6. News: Kadidal . Akhil . Tripathi . Bharat . Udoshi . Rahul . India tests anti-ship missile's features, datalink . 2 March 2025 . Janes Information Services . janes.com . 28 February 2025.
7. News: DRDO & Indian Navy successfully conduct flight-trials of first-of-its-kind Naval Anti-Ship missile . 1 March 2025 . Ministry of Defence, Government of India . Press Information Bureau . 26 February 2025.
8. Web site: Naval Anti-Ship Missile (NASM). Global Security.
9. Web site: Paul George . Justin . 18 May 2022 . Smaller, slower than BrahMos, but deadly: Why desi anti-ship missile matters . live . https://web.archive.org/web/20220519072519/https://www.theweek.in/news/india/2022/05/18/smaller-slower-than-brahmos-but-deadly-why-desi-anti-ship-missile-matters.html . 19 May 2022 . 2022-05-18 . The Week . en.
10. Web site: Missiles Adani Defence & Aerospace . 2024-08-11 . www.adanidefence.com.
11. News: Kadidal . Akhil . Tripathi . Bharat . Udoshi . Rahul . 28 February 2025 . India tests anti-ship missile's features, datalink . 2 March 2025 . janes.com . Janes Information Services.
12. Web site: Missiles Adani Defence & Aerospace . 2024-09-13 . www.adanidefence.com.
13. News: 2025-02-26 . DRDO & Indian Navy successfully conduct flight-trials of first-of-its-kind Naval Anti-Ship missile . 2025-02-26 . Press Information Bureau.
14. Web site: 2022-05-21 . Explained: Why the anti-ship missile tested by the Navy matters . live . https://web.archive.org/web/20220521071253/https://indianexpress.com/article/explained/navy-anti-ship-missile-significance-explained-7928016/ . 21 May 2022 . 2022-05-21 . The Indian Express . en.
15. Web site: Singh . Mayank . 2025-02-26 . Indian Navy successfully tests first-of-its-kind NASM-SR missile with in-flight retargeting . 2025-02-26 . The New Indian Express . en.
16. Web site: 2022-05-19 . India tests indigenous anti-ship missile in a boost to self-reliance . live . https://web.archive.org/web/20220519073202/https://www.hindustantimes.com/india-news/india-tests-indigenous-anti-ship-missile-in-a-boost-to-selfreliance-101652899484048-amp.html . 19 May 2022 . 2022-05-19 . Hindustan Times . en.
17. Web site: Singh . Mayank . 19 May 2022 . Air-launched anti-ship missile successfully tested . live . https://web.archive.org/web/20220519161805/https://www.newindianexpress.com/nation/2022/may/19/air-launched-anti-ship-missile-successfully-tested-2455326.html . 19 May 2022 . 2022-05-19 . The New Indian Express.
18. News: 2022-05-18 . India successfully test-fires naval anti-ship missile . 2022-05-19 . The Hindu . en-IN . 0971-751X.
19. Web site: 2023-11-21 . Indian Navy tests first indigenously developed ‘anti-ship missile’ Watch . 2023-11-21 . Hindustan Times . en.