GRSE Delivers INS Dunagiri, INS Sanshodhak & INS Agray — Three Naval Platforms in One Day

🗞️ Why in News Garden Reach Shipbuilders & Engineers (GRSE), Kolkata, simultaneously delivered three frontline naval platforms on March 31, 2026 — INS Dunagiri (stealth frigate), INS Sanshodhak (survey vessel), and INS Agray (anti-submarine warfare craft) — taking its total warship tally to 118 and reaffirming India’s growing indigenisation in shipbuilding.

India’s Naval Shipbuilding Milestones

GRSE — Backbone of India’s Naval Build

Garden Reach Shipbuilders & Engineers Limited (GRSE), headquartered in Kolkata, is a Ministry of Defence Public Sector Undertaking (PSU) that has been the principal builder of surface warships for the Indian Navy since independence. The simultaneous delivery of three vessels on a single day — a rare logistical and engineering achievement — takes GRSE’s cumulative tally to 118 naval platforms, of which 80 have been delivered to the Indian Navy.

INS Dunagiri — Project 17A Stealth Frigate

The Nilgiri-Class Programme

INS Dunagiri is the fifth vessel in the Nilgiri-class stealth frigates under Project 17A — India’s most ambitious frigate programme. Project 17A is an upgrade over the earlier Project 17 Shivalik-class frigates, incorporating significantly greater stealth, automation, and weapons integration.

Key Specifications — INS Dunagiri

Project 17A Programme Overview

Project 17A involves the construction of 7 frigates split between two shipyards:

• Mazagon Dock Shipbuilders Ltd (MDL), Mumbai: 4 frigates (lead ship INS Nilgiri commissioned 2026)
• GRSE, Kolkata: 3 frigates

BrahMos missile carried by INS Dunagiri is a joint venture between India and Russia — a supersonic cruise missile with a range of ~300 km (export version) and ~500+ km (domestic). It is the world’s fastest operationally deployed anti-ship cruise missile.

INS Sanshodhak — Survey and Oceanographic Vessel

INS Sanshodhak is the fourth in its class of survey vessels, designed for:

• Hydrographic surveys of harbours, ports, and coastal waters
• Oceanographic data collection for navigation safety and research
• Support to the National Hydrographic Office (NHO), Dehradun

Survey vessels play a critical dual role in the Navy: operational (mine-laying, covert insertion) and scientific (charting undersea terrain critical for submarine operations).

INS Agray — ASW Shallow Water Craft

Anti-Submarine Warfare in Shallow Waters

INS Agray is an Anti-Submarine Warfare (ASW) Shallow Water Craft — designed to hunt submarines in coastal and littoral zones, the most complex operational environment for ASW.

Key Features

• Indigenisation: ~88% indigenous content — one of the highest among all naval platforms
• Armament: Lightweight torpedoes + ASW rockets
• Operational domain: Coastal defence, harbour protection, shallow-water ASW
• Strategic value: As adversary submarine activity increases in the Arabian Sea and Indian Ocean littorals, shallow-water ASW craft are increasingly critical

India’s Shipbuilding Industrial Policy

Maritime India Vision 2030 and Amrit Kaal

India’s Maritime India Vision 2030 and the National Maritime Security Coordinator framework target making India one of the world’s top five maritime nations by 2047. Key shipbuilding objectives:

Key Shipbuilding PSUs

INS Vikrant — India’s first indigenous aircraft carrier, built by CSL, commissioned in 2022.

DTTI and Naval Indigenisation

India’s Defence Technology and Trade Initiative (DTTI) with the USA and the broader Atmanirbhar Bharat push in defence aim to:

• Reduce import dependency from 70% to 30% of defence procurement
• Develop a domestic defence industrial base capable of export
• GRSE’s ~88% indigenisation on INS Agray is a benchmark for the programme

UPSC Relevance

Prelims: Project 17A details; GRSE warship count; INS Dunagiri class and propulsion; BrahMos specifications; CODAG propulsion; Nilgiri-class vs Shivalik-class; India’s top five maritime nation target. Mains GS-3: “How does India’s defence shipbuilding ecosystem contribute to strategic autonomy and the Atmanirbhar Bharat vision?” Discuss challenges and achievements. Mains GS-2: India’s maritime security posture in the Indian Ocean Region — GRSE’s role and linkage to SAGAR doctrine.

📌 Facts Corner — Knowledgepedia

GRSE Milestone:

• Total warships delivered: 118 (80 for Indian Navy)
• Location: Garden Reach Shipbuilders & Engineers, Kolkata
• Ministry: Ministry of Defence (PSU)

INS Dunagiri (Project 17A):

• Class: Nilgiri-class stealth frigate
• Position: 5th vessel; 2nd GRSE-built under P17A
• Length: 149 m; Displacement: 6,670 tonnes
• Propulsion: CODAG (Combined Diesel and Gas)
• Weapon: BrahMos supersonic cruise missile
• P17A total ships: 7 (MDL: 4 + GRSE: 3)

BrahMos Missile:

• Joint venture: India (DRDO/BDL) + Russia (NPO Mashinostroyeniya)
• Speed: Mach 2.8–3.0
• Range: ~300 km (export); 500+ km (domestic variant)
• World’s fastest operationally deployed supersonic cruise missile

INS Agray:

• Type: ASW Shallow Water Craft
• Indigenisation: ~88%
• Armament: Lightweight torpedoes + ASW rockets

Indian Shipbuilding Targets (2047):

• Global market share target: Top 5 (currently 0.06%)
• Maritime GDP target: 12% (current ~4%)
• Seafarers (global share target): 25% (current 12%)

Other Relevant Facts:

• INS Vikrant: India’s first indigenous aircraft carrier; built by Cochin Shipyard; commissioned September 2022
• INS Nilgiri: Lead ship of Nilgiri-class (P17A); built by MDL
• Project 17 (Shivalik-class): Predecessor; 3 frigates (INS Shivalik, INS Sahyadri, INS Satpura)
• Maritime India Vision 2030 launched at Maritime India Summit 2021
• DTTI: Defence Technology and Trade Initiative (India-USA); launched 2012

Sources: Indian Navy, PIB, GRSE