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Shyena
Advanced Light Torpedo Shyena
Type	Lightweight ASW torpedo
Place of origin	India
Service history
Used by	See Operators
Production history
Designer	Naval Science and Technological Laboratory
Manufacturer	Bharat Dynamics Limited Larsen & Toubro Limited
Produced	March 2012 – present
No. built	2,000+
Specifications
Mass	220 kg (490 lb)
Length	2.75 m (9.0 ft)
Diameter	324 mm (12.8 in)
Warhead	High explosive
Warhead weight	50 kg (110 lb)
Engine	Electric
Operational range	19 km (10 nmi)
Maximum depth	450 m (1,480 ft)
Maximum speed	33 kn (61.1 km/h; 38.0 mph)
Guidance system	Acoustic homing (active/passive)
Launch platform	Ships, helicopters

The Torpedo Advanced Light (TAL) Shyena (Sanskrit: श्येन, "Falcon or Hawk") is the first indigenous advanced lightweight anti-submarine torpedo of India, developed by the Naval Science and Technological Laboratory (NSTL) of the Defence Research and Development Organisation (DRDO) for the Indian Navy. The lightweight torpedo can be launched by ships, helicopters and previously the now retired Ilyushin Il-38, named after the divine hawk identified with Agni.

Torpedo Advanced Light Shyena also utilizes SMART missile as long range delivery platform.

Introduction

Shyena is a processor based torpedo which incorporates solid-state electronics, digital technology and has been equipped with an integrated Active/Passive sensor package for homing. It is designed to be capable of being launched from both a helicopter or from a triple-tube launcher on surface vessels. Its key design feature are maneuverability and ability to transition from warm to cold medium to ensure a hunt and kill. The development period of the torpedo was quite long, starting in the 1990s, and concluding with its induction into the Indian Navy on 3 March 2012. On that date, the Defence Minister A.K. Antony handed over the first consignment of TAL to the Navy in Hyderabad.

Design and development

Development of this missile was started by the Naval Science and Technological Laboratory (NSTL) in 1990s, under the Advanced Experimental Torpedo (TAE) program. It is an advanced capability torpedo and is heavily based on the Whitehead A244-S torpedo. NSTL had faced a difficult task of developing a torpedo which could sustain its efficiency, in particular the maneuverability and structural integrity while travelling from the air medium to water after being launched from the air. The computers perform their respective tasks, which are the successful launch of the torpedo, the homing of the target and its control and finally the recording of the data for analysis.

Shyena is electrically propelled, and can target submarines with a speed of 33 knots with endurance of six minutes in both shallow and deep waters. It can operate at depths of a few hundred metres and has self-homing, i.e. it can home in on targets by passive/active homing and explode on impact. Once launched, it can perform pre-programmed search patterns for available targets. The torpedo weighs around 220 kg.

Deployment

By 1998, Shyena was ready for trials, and it was tested 24 times by the NSTL from 1998 to 2000. During trials, thrust was laid on monitoring of various factors through four computers fitted on board Shyena. User evaluation tests with designed and engineered models of the TAL took place in 2003–2005. The tests confinced the Navy of the system's capabilities. Ninety-five per cent of the components were indigenous except a few integrated circuits and sensors. The Navy ordered 25 units, and was considered likely to order more. The TAL is currently being manufactured by Bharat Dynamics Limited at its Visakhapatnam unit.

On 8 March 2021, the Indian Navy successfully cleared Shyena's maiden flight trial with a parachute system from the Ilyushin Il-38 maritime aircraft.

Advanced Light-Weight Torpedo (ALWT)

Advanced Light-Weight Torpedo (ALWT) is the 2nd generation of Shyena anti-submarine torpedo. The torpedo is developed by Naval Science and Technological Laboratory (NSTL) of DRDO and produced by Bharat Electronics Limited (BEL). It can be launched from ship, helicopter or from a fixed wing aircraft. The torpedo boasts a dual-speed capability for which it has a range of 25 km (16 mi) at 25 kn (46 km/h) and a range of 12 km (7.5 mi) at 50 kn (93 km/h). It uses sea-water powered battery which eliminates the requirement of pre-launch charging. On 17 July 2024, it was announced that ALWT has completed all the user trials and is poised to replace Mark 46 torpedo in the Indian Navy's inventory. The torpedo will also be integrated on the Boeing P-8I Neptune fleet of the Indian Navy for anti-submarine warfare operations.

Export

In March 2017, India signed a $37.9 million deal to supply Shyena to the Myanmar Navy. The first batch of 20 torpedoes were delivered in July 2019.

BDL signed a third and fourth export contract for the Shyena torpedo in 2019 to an undisclosed friendly country. The value of the contract is ₹455.27 crore (equivalent to ₹566 crore or US$66 million in 2023) and ₹1.43 crore (equivalent to ₹1.6 crore or US$190,000 in 2023) respectively. The order is planned to be executed in 2020–21.

BDL has signed a total of 5 export orders for Shyena torpedoes to an undisclosed friendly country(s). Four orders has been successfully delivered while the fifth one is under execution in 2021–22.

Operators

 India

• Indian Navy

 Myanmar

• Myanmar Navy
  • Kyan Sittha-class frigate
  • Anawrahta-class corvette
  • Yan Nyein Aung-class submarine chaser

Coverage

In his book "Naval Institute Guide to Combat Fleets of the World: Their Ships, Aircraft, and Systems", Eric Wertheim has described the Shyena as an up-and-coming torpedo developed by the DRDO.

Pursuit and Promotion of Science, a report published by Indian National Science Academy mentions Shyena as an advanced experimental torpedo.

See also

• APR-3E torpedo – Russian equivalent
• A244-S – Italian equivalent
• Mark 54 Lightweight Torpedo – US Navy's equivalent
• MU90 Impact – French/Italian equivalent
• Sting Ray (torpedo) – British equivalent
• Yu-7 torpedo – Chinese equivalent
• K745 Chung Sang Eo – South Korean equivalent
• Type 97 light weight torpedo (G-RX4) – Japanese equivalent

References

1. ^ "Torpedo Advanced Light (TAL)". DRDO. New Delhi. Archived from the original on 22 July 2021. Retrieved 23 July 2021.
2. ^ Pandit, Rajat (24 March 2017). "India steps up supply of military equipment to Myanmar to counter China". The Times of India. Archived from the original on 22 May 2019. Retrieved 19 January 2020.
3. "India successfully conducts maiden flight trial indigenous torpedo 'Shyean'". Affairs Cloud. Archived from the original on 22 July 2021. Retrieved 23 July 2021.
4. "Wiktionary". Wiktionary. Archived from the original on 26 January 2021.
5. ^ Austin Joseph (January–February 2001). "Modern Torpedoes And Countermeasures". BHARAT RAKSHAK MONITOR Volume 3(4). Archived from the original on 22 February 2012. Retrieved 20 February 2012.
6. ^ "Indian Navy to receive Indigenous Light Torpedo SHYENA". SPS Naval Forces. Archived from the original on 22 February 2013. Retrieved 13 January 2013.
7. Negi, Manjeet (1 May 2024). "Long-range anti-submarine missile system successfully tested". India Today. Retrieved 1 May 2024.
8. ^ Vishwanath Hiremathpune (1997). "Indian Navy's own torpedo 'Shyena' ready for trials". The Indian Express. Archived from the original on 22 January 2013. Retrieved 20 February 2012.
9. T. S. Subramanian (2 March 2012). "Torpedo, Akash missile to be handed over to Navy and IAF on Saturday". The Hindu. Archived from the original on 15 December 2013. Retrieved 5 April 2013.
10. Bhattacharjee, Sumit (9 March 2021). "Lightweight torpedo test-fired successfully". The Hindu. Archived from the original on 10 March 2021. Retrieved 9 March 2021.
11. "The Indian Navy must finalise its torpedo requirements as new generation torpedoes are now beginning to emerge". Retrieved 30 August 2024.
12. "BEL's Advanced Lightweight Torpedo (ALWT) Clears User Trials, Set to Revolutionize Anti-Submarine Warfare". Defence.in. 17 July 2024. Retrieved 30 August 2024.
13. "India's P-8I Aircraft to be Armed with Indigenous Dual-Speed Light Torpedo to Bolster Aerial Anti-Submarine Defence". Defence.in. 29 August 2024. Retrieved 30 August 2024.
14. Diplomat, Prashanth Parameswaran, The. "India to Supply Torpedoes to Myanmar". The Diplomat. Archived from the original on 11 November 2020. Retrieved 29 April 2017.{{cite news}}: CS1 maint: multiple names: authors list (link)
15. ^ Panda, Ankit (16 July 2019). "India Delivers Initial Batch of Indigenously Built Torpedoes to Myanmar Navy". The Diplomat. Archived from the original on 28 October 2020. Retrieved 21 April 2020.
16. "Annual Report 2019-20 BDL" (PDF). BDL India. Archived (PDF) from the original on 15 October 2021. Retrieved 11 October 2020.
17. "Annual Report 2021-22" (PDF). BDL India. 1 September 2022.
18. "Enhancing Indian Defence Exports" (PDF). Society of Indian Defence Manufacturers: 27. 2020. Archived (PDF) from the original on 30 April 2023. Retrieved 15 May 2023.
19. Eric Wertheim (March 2007). Naval Institute Guide to Combat Fleets of the World: Their Ships, Aircraft, and Systems. Naval Institute Press. p. 288. ISBN 978-1-59114-955-2.
20. "31 Defence Research and Development Organisation" (PDF), Pursuit and Promotion of Science : The Indian Experience, Indian National Science Academy, p. 4, OCLC 52079109, archived from the original (PDF) on 25 October 2020, retrieved 27 February 2012

• Torpedoes of India
• Indian Navy
• Aerial torpedoes
• Military equipment introduced in the 2010s