Indian Navy receives INS Sanshodhak, completing four-vessel Large Survey Ship programme

Key facts

• Indian Navy took delivery of fourth Survey Vessel (Large) INS Sanshodhak on 30 March from Garden Reach Shipbuilders & Engineers (GRSE) in Kolkata.
• Contract for four survey vessels was signed in October 2018 and project spanned eight years.
• Earlier ships INS Sandhayak, INS Nirdeshak and INS Ikshak were commissioned between February 2024 and November 2025.
• INS Sanshodhak displaces approximately 3,400 tonnes, measures 110 metres in length and can exceed 18 knots speed.
• Vessel is fitted with autonomous underwater vehicles, remotely operated vehicles and digital side-scan sonar.
• Indigenous content surpasses 80 per cent by cost.
• Keel was laid in June 2022, vessel launched in June 2023 and underwent extensive harbour and sea trials.
• Survey Vessel (Large) class designed by Indian Navy's Warship Design Bureau and built to Indian Register of Shipping classification rules.
• Vessels conduct coastal and deep-water hydrographic surveys and collect oceanographic and geophysical data for defence and civilian use.
• GRSE also delivered stealth frigate Dunagiri and anti-submarine craft Agray on same day, taking shipyard's total to 118 warships built including 80 for Indian Navy.