Defence Ministry signs ₹498.58 crore deal with Cochin Shipyard to refit INS Betwa and replace its steam propulsion with diesel
The Defence Ministry has signed a ₹498.58 crore contract with Cochin Shipyard to refit INS Betwa and replace the frigate's steam propulsion with diesel engines. It is the second Brahmaputra-class ship to be re-powered at an Indian yard, after INS Beas.
The Ministry of Defence on 11 November 2026 signed a ₹498.58 crore contract with Cochin Shipyard Limited (CSL) for the normal refit and re-powering of INS Betwa, a Brahmaputra-class guided-missile frigate of the Indian Navy. The contract was signed in New Delhi in the presence of Defence Secretary Rajesh Kumar Singh.
The main part of the work is a change of engines. Betwa's existing steam-based propulsion system will be replaced with a diesel-engine-based one. Reports also say the refit will modernise parts of the ship's combat systems. The ministry said the project will further strengthen indigenous capability in the ship repair and maintenance ecosystem.
The second of three
Betwa is the second Brahmaputra-class ship to be re-engined. The first was INS Beas, for which the ministry signed a ₹313.42 crore mid-life upgrade and re-powering contract with CSL in October 2023, with completion expected in 2026. At the time, reports said the class's other two ships, INS Brahmaputra and INS Betwa, would get new engines once the first conversion was done. The Betwa contract is that plan moving ahead.
The three Brahmaputra-class frigates were designed and built in India at Garden Reach Shipbuilders and Engineers in Kolkata. They are among the last major Indian Navy surface combatants with steam turbine propulsion. Betwa was launched in 1998. In December 2016 it tipped over in dry dock in Mumbai during a refit, damaging the ship and killing two sailors. It returned to service in 2020 after extensive repairs.
Why swap steam for diesel
Steam turbines were standard in warships of an earlier generation. Today they are increasingly costly to keep running. They need large crews of specialist engine-room staff and boilers that take time to raise steam, and they burn fuel less efficiently than modern marine diesel engines. Spares and expertise for ageing steam plants are also getting harder to find.
Re-powering with diesel generally brings:
- Better fuel efficiency and endurance, so the ship can stay on station longer.
- Lower crew requirements in the machinery spaces, and simpler training.
- Faster readiness, since diesels can start without the long warm-up a boiler needs.
- Easier maintenance, drawing on a wider supplier base.
Re-engining an existing hull is a demanding engineering job. It means cutting into the ship, removing the old machinery, re-arranging engine rooms, fuel and exhaust systems, and integrating new controls, all without weakening the structure. Doing it at an Indian yard, after the Beas experience, builds a repeatable capability.
The bigger picture: life extension as indigenisation
The Navy is building new ships at a fast pace. In the same month it signed ₹53,866 crore of contracts with GRSE and Goa Shipyard for eight Next Generation Corvettes. Even so, upgrading existing hulls remains one of the most cost-effective ways to keep fleet numbers up while new ships are built. A re-powered, modernised Betwa could stay in useful service for years longer than it otherwise would.
The contract also matters for the industrial base. The ministry expects more than 50 MSMEs to participate in the Betwa project. Over time, refit, repair and overhaul work, much of it carried out by smaller suppliers, has become an important part of India's push for self-reliance in defence. It keeps skills and spending in the country and lowers the Navy's reliance on foreign original equipment makers for support across a ship's life.
The ministry has not published a schedule for Betwa's return to the fleet.
Sources
- https://www.freepressjournal.in/business/defence-ministry-signs-498-crore-contract-with-cochin-shipyard-for-ins-betwa-refit-and-re-powering
- https://idrw.org/cochin-shipyard-ins-betwa-refit-repowering-contract/
- https://dailypioneer.com/india/defence-ministry-signs-rs-49858-crore-deal-with-cochin-shipyard-for-ins-betwa-refit
- https://www.maritimegateway.com/cochin-shipyard-secures-%E2%82%B9498-crore-contract-to-upgrade-ins-betwa/
- https://www.etvbharat.com/en/bharat/defence-ministry-inks-contract-worth-rs-498-crore-for-refit-of-ins-betwa-enn26111104427
- https://www.globalsecurity.org/wmd/library/news/india/2023/india-231016-india-pib02.htm
- https://www.navalnews.com/naval-news/2023/10/indias-cochin-shipyard-tapped-for-brahmaputra-class-frigate-mlu/
- https://www.entrepreneurindia.com/blog/en/article/cochin-shipyard-with-over-50-msmes-to-upgrade-ins-beas.55212
- https://www.pib.gov.in/PressReleseDetailm.aspx?PRID=2334945&lang=1®=1