DRDO's Naval Science and Technological Laboratory (NSTL), Visakhapatnam, signed two Licensing Agreements for Transfer of Technology on 21 August 2026.
The first transfers the Submarine-Fired Decoy, named Mohini, to Bharat Dynamics Limited for production.
The second transfers the fabrication, installation and commissioning of the LM2500 gas turbine to Vertex Engineering Systems Pvt Ltd, Hyderabad.
A submarine-fired decoy protects a submarine by generating false acoustic signatures that draw an incoming torpedo away from the real target.
In April 2026, NSTL had signed a similar agreement with BHEL for the LM2500 Gas Turbine Infrared Suppression System.
A torpedo hunting a submarine homes in on the acoustic signature the submarine puts into the water. A submarine-fired decoy is ejected by the submarine and generates false acoustic signals that imitate that signature, so the torpedo's seeker locks onto the decoy instead. The submarine does not become invisible - it buys distance and time to manoeuvre out of the torpedo's search cone. Decoys therefore belong to the family of soft-kill countermeasures, which deceive a weapon rather than destroying it, and sit alongside stealth design, sonars and torpedoes as one layer of a submarine's survivability.
Simple Analogy: It works the way flares work for an aircraft against a heat-seeking missile - you cannot outrun the weapon, so you give it something more attractive to chase.
DRDO laboratory for underwater weapons and naval systems - torpedoes, decoys, mines and related technologies
India's premier defence research agency under the Ministry of Defence; develops technologies and licenses them to industry for production
Defence public sector undertaking that manufactures missiles, torpedoes and countermeasure systems, and is a long-standing production partner for DRDO designs
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NSTL signs two LAToTs - Submarine-Fired Decoy to Bharat Dynamics Limited and LM2500 gas turbine work to Vertex Engineering Systems
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Licensing Agreement for Transfer of Technology - the formal instrument by which DRDO hands a developed technology to an industrial partner for production.
A soft-kill countermeasure ejected by a submarine that mimics its acoustic signature to divert an incoming torpedo.
A marine gas turbine used to propel destroyers, frigates and aircraft carriers.
Defeating an incoming weapon by deception or jamming rather than by physically destroying it.