In the vast expanse of the Indian Ocean, a sleek vessel cuts through the waves, its advanced sensors probing the depths below. This is INS Sandhayak, the Indian Navy’s newest hydrographic survey vessel, commissioned on February 3, 2024. As the lead ship of her class, INS Sandhayak represents a significant leap forward in India’s maritime capabilities.
The Birth of a Maritime Marvel
Garden Reach Shipbuilders and Engineers (GRSE) in Kolkata birthed INS Sandhayak. The shipyard’s skilled workers toiled for months, bringing to life a vessel that would become the eyes and ears of the Indian Navy beneath the waves. As the first of four planned survey vessels, INS Sandhayak carries the weight of expectation on her steel hull.
“INS Sandhayak embodies our commitment to self-reliance in defense technology,” declared Defense Minister Rajnath Singh during the commissioning ceremony. His words echoed the pride of a nation taking strides toward maritime supremacy.
A Technological Powerhouse
INS Sandhayak stretches 110 meters from bow to stern, with a beam of 16 meters. Her displacement of 3,300 tons makes her the largest survey vessel ever built in India. But it’s not size alone that sets INS Sandhayak apart.

The vessel bristles with cutting-edge technology. Multibeam echosounders scan the ocean floor, mapping every contour and crevice. Side Scan sonars peer into the murky depths, seeking hidden obstacles and sunken treasures. Autonomous underwater vehicles (AUVs) and remotely operated vehicles (ROVs) extend the ship’s reach, exploring areas too dangerous or deep for human divers.
The Chief of Naval Staff, Admiral R. Hari Kumar, underscored the significance of the vessel: “INS Sandhayak is essential for both military operations and civilian maritime activities.”
More Than Just a Survey Ship
While hydrographic surveys remain INS Sandhayak’s primary mission, her capabilities extend far beyond that. During disasters, the ship can transform into a floating hospital, providing critical medical aid to coastal communities. Her advanced communication systems make her an ideal platform for search and rescue operations, a beacon of hope for those lost at sea.
INS Sandhayak’s endurance is impressive. She can sail 6,500 nautical miles at a cruising speed of 16 knots, allowing her to operate in India’s Exclusive Economic Zone and beyond. When speed is crucial, two powerful diesel engines propel her to a top speed of 18 knots.
A Testament to Indian Engineering
INS Sandhayak is a shining example of Prime Minister Narendra Modi’s “Make in India” initiative. Over 80% of the ship’s components are indigenously manufactured, filling every crew member with pride.
“Every bolt and every weld on this ship tells a story of Indian ingenuity,” boasts Lieutenant Commander Priya Sharma, one of INS Sandhayak’s navigation officers. “We’re not just operating a ship; we’re sailing a piece of India’s technological future.”
Charting the Future

As INS Sandhayak begins her service, her sister ships—INS Nirdeshak, INS Ikshak, and INS Sanshodhak—are already taking shape in shipyards across India. Together, they will form the backbone of India’s hydrographic survey capabilities for decades.
We cannot overstate the importance of these vessels. Accurate nautical charts are the lifeblood of maritime trade and naval operations. With over 90% of India’s trade traveling by sea in volume, the work of INS Sandhayak and her sisters will have a direct impact on the nation’s economic prosperity.
A Legacy Reborn
The name “Sandhayak” carries a proud legacy in the Indian Navy. Before decommissioning in 2021, the previous INS, Sandhayak, served for 40 years. During her illustrious career, she conducted over 200 major hydrographic surveys along the Indian coasts and neighboring countries.
Now, a new INS Sandhayak takes up the mantle, equipped to face the challenges of the 21st century. With her advanced capabilities and dedicated crew, she’s poised to write a new chapter in India’s maritime history.
Key Specifications
Component Origin
As INS Sandhayak sails into the future, she carries with her the hopes and aspirations of a nation. Her commanding officer, Captain Adhir Arora, says, “Every nautical mile we survey, every chart we produce, brings India one step closer to true maritime greatness. INS Sandhayak isn’t just a ship; she promises a safer, more prosperous future for all Indians.”
Frequently Asked Questions
INS Sandhayak conducts comprehensive coastal and deep-water hydrographic surveys. This includes mapping ports, coastal areas, and navigational channels and collecting oceanographic and geophysical data to support military and civilian maritime activities.
INS Sandhayak exemplifies India’s push for self-reliance in defense technology. Over 80% of the ship’s components are indigenously manufactured, aligning with the “Make in India” initiative. This high level of local content boosts India’s shipbuilding capabilities and reduces dependence on foreign technology for critical naval assets.



