
The contract for building four SVL ships was signed between MoD and Garden Reach Shipbuilders & Engineers (GRSE), Kolkata on 30 Oct 18. As per the build strategy, the first ship would be built at GRSE, Kolkata and construction of the remaining three ships upto outfitting stage, has been sub-contracted to M/s L&T Shipbuilding, Kattupalli. The first three ships of the project, Sandhayak, Nirdeshak and Ikshak were launched on 05 Dec 21, 26 May 22 and 26 Nov 22 respectively.

SVL ships will replace the existing Sandhayak Class survey ships, with new generation hydrographic equipment, to collect oceanographic data. The Survey Vessel (Large) ships are 110 m long, 16 m wide with a displacement of 3,400 tons. The hull of these ships is made from indigenously developed DMR 249-A steel manufactured by Steel Authority of India Limited.
With a capability to carry four Survey Motor Boats and an integral helicopter, the primary role of the ships would be to undertake full scale coastal and deep-water hydrographic surveys of Ports and navigational channels. The ships would also be deployed for collecting oceanographic and geophysical data for defence as well as civil applications. In their secondary role, the ships are capable of providing limited defence, HADR, and can serve as Hospital ship during emergencies.
























