Diving Support Vessel (DSV) Nipun
Defence · Wednesday, 26 August 2026
The Indian Navy is set to commission INS Nipun, the second indigenously designed and built Nistar-class Diving Support Vessel, constructed by Hindustan Shipyard Limited, Visakhapatnam. Nipun serves as a multi-mission mothership for deep-sea saturation diving, submarine rescue, underwater salvage, and hydrographic intervention.
Quick highlights
- Nipun is the second Nistar-class DSV, indigenously designed and built by Hindustan Shipyard Limited (HSL), Visakhapatnam.
- Equipped with an integrated saturation diving complex including diving bells, mixed-gas breathing setups, and hyperbaric recompression chambers.
- Serves as a launch, recovery, and support platform for Deep Submergence Rescue Vehicles (DSRVs) for distressed submarine rescue.
- Features dynamic positioning (DP) propulsion systems for precise station-keeping in strong currents and swell.
- Fitted with heavy-lift cranes, side-scan sonars, and ROV launch suites for underwater inspection and obstacle clearance.
- Houses dedicated hyperbaric and medical facilities for decompression sickness management and trauma care.
Context
The Indian Navy is scheduled to commission INS Nipun, the second indigenously designed and constructed Diving Support Vessel of the Nistar-class. The vessel addresses a critical capability gap in sustained deep-sea saturation diving, complex underwater engineering, and rapid-response submarine rescue across India's maritime zones of interest.
Key Facts
Built by Hindustan Shipyard Limited (HSL), Visakhapatnam. Nistar-class DSVs are purpose-built, high-tech multi-mission motherships. Key capabilities: deep-sea saturation diving, underwater salvage, hydrographic intervention, and distressed submarine rescue. Features include integrated saturation diving complex, DSRV carrier capability, dynamic positioning systems, ROV launch suites, side-scan sonars, and onboard hyperbaric medical facilities.
Significance
The Nistar-class provides indigenous, round-the-clock submarine rescue and salvage capability, reducing dependence on foreign assistance. It enhances India's underwater rescue and intervention capabilities in the Indian Ocean Region (IOR), supporting the expanding conventional and nuclear submarine fleet. The vessel strengthens India's self-reliance in critical naval infrastructure under Atmanirbhar Bharat.
Challenges / Way Forward
Operating deep-sea saturation diving systems requires highly trained personnel and continuous maintenance of hyperbaric infrastructure. Integration with the existing DSRV fleet and coordination with the Navy's submarine arm need seamless operational protocols. Way forward includes expanding the DSV fleet for simultaneous IOR coverage and developing indigenous DSRV capabilities to complement the mothership platform.
Exam Angle
GS Paper III (Internal Security/Defence): Indian Navy modernisation, indigenous defence platforms, submarine rescue capability. Prelims: Nistar-class, HSL Visakhapatnam, DSRV, saturation diving, dynamic positioning. GS Paper III (S&T): deep-sea technology, hyperbaric medicine, underwater robotics.
Remember this
- DSV Nipun is the second vessel of the Nistar-class.
- Built indigenously by Hindustan Shipyard Limited (HSL), Visakhapatnam.
- Nistar-class provides deep-sea saturation diving and submarine rescue capability.
- DSV Nipun serves as a DSRV (Deep Submergence Rescue Vehicle) carrier.
- Dynamic positioning (DP) systems enable precise station-keeping at sea.
- Onboard facilities include hyperbaric recompression chambers and ROV launch suites.
- The vessel reduces India's dependence on foreign submarine rescue assistance.
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