What are the three ships with three different strategic roles that Navy inducted

📌 Summary:

• Indian Navy commissioned three GRSE-built ships at Kolkata on June 21, 2026, with PM Modi presiding: INS Dunagiri, INS Sanshodhak and INS Agray

• All three have over 75% indigenous content and involved 200+ MSMEs, reflecting Atmanirbhar Bharat in defence shipbuilding

• INS Dunagiri: Project 17A stealth guided-missile frigate; a blue-water platform armed with BrahMos surface-to-surface missiles, MRSAM, MFSTAR radar, sonar and electronic warfare systems

• INS Sanshodhak: Survey Vessel-Large (Sandhayak class) that maps sea depth, seabed features, channels and oceanographic data using AUVs, ROVs and multi-beam echo sounders

• INS Agray: Arnala-class Anti-Submarine Warfare Shallow Water Craft (ASW SWC) for littoral submarine-hunting; carries lightweight torpedoes, indigenous ASW rocket launchers and sonar

• Strategic message: simultaneous induction strengthens blue-water operations, maritime domain awareness and coastal security amid rising Chinese and Pakistani naval presence in the Indian Ocean

🎯 UPSC Relevance: GS3 — defence indigenisation, maritime security and S&T applications; illustrates the Navy's balanced capability development and Make-in-India shipbuilding

📝 Prelims Facts:

• Builder: Garden Reach Shipbuilders & Engineers (GRSE), Kolkata

• INS Dunagiri is part of the Project 17A stealth frigate programme (sister ships: Nilgiri, Himgiri, Taragiri, Udaygiri, Vindhyagiri)

• INS Sanshodhak is the last of four Sandhayak-class SVLs (others: Sandhayak, Nirdeshak, Ikshak)

• INS Agray belongs to the Arnala-class ASW SWC

🔑 Key Term: Littoral — waters close to the shore; cluttered, noisy zones where submarine detection is hardest, addressed by ASW shallow-water craft