Facts for Prelims (FFP)
Source: PIB
Context: The first of four Survey Vessel (Large) ships, Sandhayak, constructed at Garden Reach Shipbuilders & Engineers (GRSE) in Kolkata, was delivered to the Indian Navy.
| Feature | Details |
| Purpose | Intended for full-scale coastal and deep-water hydrographic surveys of port and harbour approaches, determining navigational channels and routes. |
| Zone of Operation | The zone of operation includes maritime limits up to the Exclusive Economic Zone (EEZ) and the extended continental shelf. |
| Data Collection | The ships have the capability to collect oceanographic and geophysical data for defence and civil applications. |
| Hydrographic Equipment | Equipped with advanced hydrographic equipment, including: – Data Acquisition and Processing System – Autonomous Underwater Vehicle – Remotely Operated Vehicle – DGPS Long-range positioning systems – Digital side-scan sonar |
| Propulsion | Propelled by two diesel engines. |
| Speed | Capable of achieving speeds exceeding 18 knots. |
| Indigenous Content | The ship boasts over 80% indigenous content by cost. |
| Aatma Nirbhar Bharat Commitment | The delivery of Sandhayak highlights the commitment of the Indian government and navy to ‘Aatma Nirbhar Bharat’ (Self-reliant India). |








