What INS Mahendragiri’s commissioning shows about India’s naval shipbuilding prowess
The Indian Navy commissioned the stealth frigate INS Mahendragiri into its Eastern Fleet at a ceremony in Visakhapatnam on July 11, 2026
INS Mahendragiri is the sixth of seven Project 17A (Nilgiri-class) frigates to be inducted, completing this milestone within about one-and-a-half years of the first ship's commissioning
The ship carries over 75% indigenous content and was built with contributions from more than 200 Indian industries, including numerous Micro, Small and Medium Enterprises (MSMEs)
Since December 2024, the Navy has commissioned 18 warships, with 8 more expected by the end of 2026 and 48 warships currently under construction
The seventh and final Project 17A frigate, INS Vindhyagiri, is expected to be commissioned later this year
Project 17A (Nilgiri-class) Frigates
Project 17A is a follow-on, upgraded design to the Project 17 (Shivalik-class) frigates, aimed at giving the Navy a generational leap in indigenous ship design, stealth, survivability, and combat capability. Seven frigates were sanctioned at an approved cost of roughly ₹45,000 crore, split between two public-sector shipyards: four built by Mazagon Dock Shipbuilders Limited (MDL), Mumbai, and three by Garden Reach Shipbuilders & Engineers (GRSE), Kolkata. The class is designed by the Navy's in-house Warship Design Bureau (WDB).
Key Details
- Seven ships: INS Nilgiri, Udaygiri, Himgiri, Taragiri, Mahendragiri, Dunagiri, and Vindhyagiri (all named after mountain ranges, continuing Navy convention for frigates)
- INS Mahendragiri: displacement ~6,670 tonnes, top speed 28 knots, over 75% indigenous content
- Propulsion: Combined Diesel or Gas (CODOG) — a diesel engine and gas turbine driving Controllable Pitch Propellers (CPP), managed by an Integrated Platform Management System (IPMS)
- Sensor/weapon suite: MF-STAR (Multi-Function Surveillance, Track and Guidance Radar), medium-range surface-to-air missiles, 76mm Super Rapid Gun Mount, 30mm/12.7mm close-in weapon systems, indigenous rocket launchers, torpedo launchers, and an Integrated Anti-Submarine Defence System
- Construction timeline compressed nearly in half: launch-to-delivery cut from 63 months to 31 months; overall build time cut from 95 months to 75 months (public-private partnerships have separately cut delivery timelines on other classes from 90 to 72 months)
INS Mahendragiri is the sixth Project 17A ship delivered, illustrating how design learnings from the first four ships (built largely by MDL) compressed build timelines for the remaining three — a template UPSC frequently tests as an example of "learning curve" gains in indigenous defence manufacturing.
BrahMos Missile — India-Russia Joint Venture
BrahMos is a ramjet-powered supersonic cruise missile developed jointly by India's DRDO and Russia's NPO Mashinostroyeniya through BrahMos Aerospace Private Limited, established in 1995. It is one of the weapons fitted on INS Mahendragiri for anti-surface warfare, and is frequently tested for its joint-venture structure and capability figures.
Key Details
- Joint venture equity: India (DRDO) holds 50.5%, Russia holds 49.5%
- Missile speed: Mach 2.8–3.0 (nearly three times the speed of sound); based on the Russian P-800 Oniks design
- Range: originally capped near 290 km (due to India's pre-2016 non-membership of the Missile Technology Control Regime); extended toward 400-800 km+ variants after India joined the MTCR in 2016
- BrahMos-II, a hypersonic scramjet variant under joint development, is targeted for Mach 8 speeds and a 1,500 km range
- Land, sea (ship and submarine), and air-launched versions are already inducted across the Indian Armed Forces
INS Mahendragiri's BrahMos fit-out is a direct application of this indigenous-cum-joint-venture missile programme, reinforcing the Navy's anti-surface warfare punch as part of its "Atmanirbhar Bharat" defence platforms.
Defence Acquisition Council (DAC) and Acceptance of Necessity (AoN)
The Defence Acquisition Council is the apex decision-making body of the Ministry of Defence for capital acquisitions for the Army, Navy, Air Force, and Coast Guard. It was constituted in 2001 following the Kargil Review Committee and Group of Ministers recommendations on national security reforms. The article attributes the pace of warship commissioning partly to the Navy receiving multiple Acceptances of Necessity (AoNs) from the DAC in a timely manner.
Key Details
- DAC is chaired by the Defence Minister; members include the Chief of Defence Staff and the three service chiefs (Army, Navy, Air Force)
- AoN is the DAC's first-stage, in-principle approval that a capability/platform is needed — it precedes the Request for Proposal (tender), trials, cost negotiation, and contract signing stages
- The full procurement process is governed by the Defence Acquisition Procedure (DAP) 2020, which operationalises the "Atmanirbhar Bharat" (self-reliant India) policy and raises indigenous-content thresholds
- DAP 2020 procurement categories (in order of indigenisation preference): Buy (Indian – IDDM), Buy (Indian), Buy and Make (Indian), Buy (Global – Manufacture in India), Buy (Global)
The article credits "a considerable number of AoNs" and timely contract signing as key reasons multiple warship classes — Project 17A, Project 15B (Visakhapatnam-class destroyers), Survey Vessel (Large), and ASW Shallow Water Craft — progressed on schedule.
- INS Mahendragiri commissioned: July 11, 2026, at Visakhapatnam, into the Eastern Fleet
- Displacement: ~6,670 tonnes; top speed: 28 knots; indigenous content: over 75%
- Project 17A: 7 ships total (4 by MDL, 3 by GRSE), approved outlay ~₹45,000 crore
- Since December 2024: 18 warships commissioned by the Indian Navy; 48 warships currently under construction; 8 more expected by end-2026
- Construction timeline compression: launch-to-delivery cut from 63 to 31 months; total build time cut from 95 to 75 months
- BrahMos joint venture equity split: India 50.5%, Russia 49.5%; missile speed Mach 2.8-3.0