Hunter of Underwater Threats: Why INS Mangrol Is Important for the Indian Navy

The Indian Navy commissioned INS Mangrol at the Naval Dockyard in Mumbai on October 12, 2026, marking an important step in strengthening India’s coastal defence and anti-submarine warfare capabilities. It is the third of eight Mahe-class Anti-Submarine Warfare Shallow Water Craft (ASW-SWC) being built by Cochin Shipyard Limited (CSL) in Kochi.

INS Mangrol is designed to detect, track and engage submarines operating in shallow coastal waters. These areas, known as littoral zones, are strategically important because they include harbour approaches, shipping routes, naval bases and offshore energy installations.

The vessel features a diesel engine-waterjet propulsion system that improves manoeuvrability and reduces underwater noise. It is 78 metres long, can reach a maximum speed of 25 knots (approximately 46 kmph), and has an operational range of around 3,333 kilometres without refuelling.

Its advanced sonar and radar systems, torpedoes and anti-submarine rockets enable it to identify and respond to underwater threats. The ship can also support underwater surveillance, search and rescue, mine-laying and low-intensity maritime operations.

The induction of INS Mangrol is part of a wider programme to strengthen India’s indigenous naval capabilities. The Defence Acquisition Council approved the procurement of 16 shallow-water anti-submarine warfare vessels in December 2013. Cochin Shipyard Limited is constructing eight Mahe-class vessels, while Garden Reach Shipbuilders and Engineers (GRSE), Kolkata, is building eight Arnala-class vessels.

With more than 80% indigenous content across the programme, the project reflects India’s efforts to develop domestic expertise in naval design, shipbuilding and defence technology.

These vessels are particularly important for India, which has an extensive coastline, numerous ports and strategically significant islands. They will help address the limitations of ageing coastal anti-submarine platforms and strengthen protection against stealthy diesel-electric submarines.

INS Mangrol will also complement coastal radar networks, underwater sensors and maritime patrol aircraft, creating a more coordinated maritime surveillance system. By handling coastal anti-submarine missions, these vessels will allow larger warships to concentrate on operations in deeper waters.

The commissioning of INS Mangrol therefore strengthens India’s capacity to safeguard its coastal waters and critical maritime assets while contributing to broader maritime security in the Indian Ocean Region.