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Navy Unveils Glimpses of Indigenous Nistar-Class Dive Support Vessel
The Indian Navy commissioned INS Nistar, the first fully indigenous Nistar-class Diving Support Vessel, at Visakhapatnam on July 18, 2025, in the presence of Defence Minister Sanjay Seth.
Delivered by Hindustan Shipyard Limited on July 8, the vessel boasts over 80 % indigenous content, with contributions from more than 120 MSMEs—underscoring India’s “Make in India” and Atmanirbhar Bharat initiatives.
The commissioning ceremony of #NISTAR, the @indiannavy's first indigenously designed and constructed Diving Support Vessel, is being presided over by Raksha Rajya Mantri Shri @SanjaySethin the presence of #CNS Admiral Dinesh K Tripathi today at Visakhapatnam. Built by Hindustan… pic.twitter.com/JReRdkoFUI
— Ministry of Defence, Government of India (@SpokespersonMoD) July 18, 2025
The ship completed its sea trials in May 2024 where it was assessed for maneuverability, propulsion systems, and onboard equipment. Between March and April 2025, the ship underwent the air/mix gas diving system trials which included unmanned and manned dives at varying depths as well as trials of its Observation-class Remotely Operated Vehicle (OROV). This will be followed by "saturation diving trials".
At 118 m in length and around 9,350 t, INS Nistar is equipped with cutting-edge technology: Deep‑Sea Diving gear capable of 300 m saturation dives, side‑stage operations to 75 m, and ROVs handling missions down to 1,000 m.
Nicknamed "Guardian of the Deep", the vessel will serve as a “mother ship” for a Deep Submergence Rescue Vehicle (DSRV), enhancing India's submarine rescue, search‑and‑rescue, and deep‑sea operational capabilities.