India commissions first indigenously built Anti-Submarine Warfare Shallow Water Craft INS Arnala

Key facts

• INS Arnala, the Indian Navy’s first indigenously designed and built Anti-Submarine Warfare Shallow Water Craft (ASW-SWC), was commissioned into the Eastern Naval Command at Visakhapatnam on 18 June 2025.
• The 77-metre, 1,490-tonne vessel was designed and built by Garden Reach Shipbuilders & Engineers (GRSE) under a Ministry of Defence programme and incorporates over 80 per cent indigenous content.
• Powered by a diesel engine–waterjet propulsion system, INS Arnala is the largest Indian naval warship using this technology, enabling high manoeuvrability and shallow-draught operations.
• The warship is equipped with advanced underwater sensors, mine-laying capability, modern command-and-control systems and stealth features to reduce radar, acoustic and infrared signatures.
• Named after Arnala Fort off Vasai, Maharashtra, the vessel is optimised for coastal anti-submarine warfare, underwater surveillance, search and rescue, and Low Intensity Maritime Operations.