Why in news?
The Ministry of Defence signed contracts worth ₹53,866.50 crore for eight Next Generation Corvettes on 2 November 2026. The Indian Navy will design these warships for missions against threats in the air, on the sea and underwater. Garden Reach Shipbuilders & Engineers Limited (GRSE) will build five, while Goa Shipyard Limited will build three. The programme, reported as Project 28A, combines several combat roles with coastal patrol, surveillance and protection of maritime trade routes. It also connects naval design work with construction and equipment supply across Indian industry.
What a multi-role corvette does
A corvette is a warship used for tasks such as patrol, escort and combat. Its particular equipment determines the missions it can perform. An escort accompanies other vessels and helps protect them during their passage. Maritime surveillance involves observing activity at sea so that the Navy can identify vessels and respond to developments.
These corvettes are planned for operations across three connected environments. Anti-surface warfare deals with threats from other ships. Air defence addresses approaching aircraft and missiles. Anti-submarine warfare involves finding and responding to submarines below the surface. Carrying several systems allows one ship to undertake different missions during a deployment.
The coastal zone presents its own operating setting. Ships, fishing craft and shore facilities can be close together, while underwater depth changes towards land. Operations in these near-shore waters are called littoral operations. Coastal defence and surveillance therefore require an understanding of the surrounding traffic and geography alongside suitable equipment.
How sensors and weapons serve different roles
A sensor gathers information about the surroundings; a weapon acts against a selected threat. Radar uses electromagnetic waves to detect and track objects. Sonar uses sound in water. Active sonar sends a pulse and examines returning echoes, while passive sonar listens for sounds already present. These methods provide different kinds of information about underwater objects.
GRSE's announced equipment plan includes anti-ship missiles, surface-to-air missiles and torpedo tubes. A surface-to-air missile travels from a ship towards an airborne target. A torpedo is an underwater weapon. The plan also includes guns for engagements at different ranges, optical and infrared sensors, radar and helicopter operations. Their combination reflects the corvette's intended range of tasks.
Design, propulsion and time at sea
GRSE specifies a length of 127 metres and a beam of 17.6 metres. Beam means a ship's width. Its release gives a maximum design speed of 26 knots and an endurance of 14 days without replenishment. A knot measures speed in nautical miles per hour. Endurance describes the period a ship can remain at sea with its available supplies.
The planned propulsion arrangement combines diesel engines and a gas turbine through a cross-connected gearbox. This machinery transmits power to two controllable-pitch propellers. Their blades can change angle to alter the thrust they produce. The arrangement brings engines, transmission and propellers together as one system for moving the vessel.
The construction programme and its industrial links
The Navy's design defines the ship and the systems it must accommodate. The yards must turn that design into a working vessel, bringing its structure, machinery and equipment together. The Ministry describes this as its first project combining an indigenous Navy design with defence public-sector yards selected through competitive bidding.
GRSE's separate contract disclosure values its five-ship share at ₹32,000 crore. It gives a completion period of nine years and four months from receipt of the first-stage payment. This starting condition matters when reading the construction schedule. The two-yard allocation also creates demand for equipment and services from other Indian businesses.
The Ministry projects 72 lakh person-days of shipyard work and 460 lakh person-days in supporting industries over ten years. These include micro, small and medium enterprises that supply the larger builders. A person-day means one person's work for one day. For example, ten people working for ten days contribute 100 person-days. The unit expresses the volume of work expected across the programme.
Conclusion
The contracts establish the builders, allocation and financial commitment for eight multi-role corvettes. The programme's next major task is to translate the Navy's design into ships with integrated propulsion, sensors and weapons. That work links the intended naval capability with a long construction effort across shipyards and their suppliers.
Sources
- Ministry of Defence: contracts, allocation, intended roles and employment projections
- GRSE: original press release with the announced design and equipment specifications
- GRSE: original contract disclosure and completion-period condition
- NOAA: how active and passive sonar work
- NOAA: nautical miles and knots
- US Naval History and Heritage Command: radar and sonar
- India Sentinels: reporting on the Next Generation Corvette programme