Context: Prime Minister of India presided over the historic tri-commissioning of INS Dunagiri, INS Sanshodhak, and INS Agray in Kolkata.
About The Tri-Commissioning of INS Dunagiri, INS Sanshodhak, and INS Agray:
What it is?
- The tri-commissioning refers to the simultaneous induction of three distinct naval platforms, each engineered for a completely different strategic theater. Together, they represent the Indian Navy’s layered approach to expanding capability: building large warships for distant operations, deep-water survey ships to map the ocean terrain, and agile coastal hunters to secure localized maritime borders against modern threats.
Individual Ship Profiles & Strategic Roles:
- INS Dunagiri (The Blue-Water Combatant)
- What It Is: A heavy, stealth guided-missile frigate that is part of the Navy’s advanced Project 17A. It is smaller than a destroyer but large enough to sail and fight far out in the deep sea.
- Developed By: Garden Reach Shipbuilders & Engineers (GRSE), Kolkata.
- Aim: To operate freely in a blue-water environment, countering both conventional and non-conventional enemy threats across distant oceanic corridors.
- Key Features:
- Built with advanced radar-evading structural stealth design geometry, making it exceptionally difficult for hostile sensors to detect.
- Armed with long-range strike weapons, including BrahMos surface-to-surface missiles and a Medium-Range Surface-to-Air Missile (MRSAM) defense network.
- Features a highly advanced sensor suite including the Multi-Function Surveillance, Track And Guidance Radar (MFSTAR), anti-submarine warfare rockets, and integrated sonar hulls.
- It is part of an elite frigate family that includes sister ships INS Nilgiri, Himgiri, Taragiri, Udaygiri, and Vindhyagiri.
- INS Sanshodhak (The Deep-Water Surveyor)
- What It Is: A Survey Vessel – Large (SVL), serving as the fourth and final ship of the specialized Sandhayak-class fleet.
- Developed By: Garden Reach Shipbuilders & Engineers (GRSE), Kolkata.
- Aim: To measure, observe, and digitally map oceanographic terrain, helping underwater naval units safely plan routes while providing charts for civilian shipping and disaster relief.
- Key Features:
- Tasked with collecting hydrographic data, analyzing seabed features, determining water depths, and mapping complex port approach channels.
- Equipped with deep-sea research tech, including Autonomous Underwater Vehicles (AUVs), remotely operated underwater vehicles (ROVs), and multi-beam echo sounders.
- Follows its sister ships—INS Sandhayak, Nirdeshak, and Ikshak—to complete the Navy’s modern large hydrographic survey fleet contract signed in 2018.
- INS Agray (The Coastal Submarine Hunter)
- What It Is: An Anti-Submarine Warfare Shallow Water Craft (ASW SWC) belonging to the specialized Arnala-class. It is the smallest but most agile of the three platforms.
- Developed By: Garden Reach Shipbuilders & Engineers (GRSE), Kolkata.
- Aim: To detect, track, and neutralize hostile submarines attempting to hide within busy, noisy, and shallow coastal (littoral) waters.
- Key Features:
- Tailored to patrol and protect vital choke points, including commercial ports, naval bases, and strategic coastal approaches.
- Specially optimized to filter out acoustic disturbances from shallow-water clutter like fishing boats, merchant shipping traffic, and uneven reefs.
- Heavily armed for close-range maritime combat with lightweight anti-submarine torpedoes, localized hull sonars, and indigenous anti-submarine rocket launchers.
