Indian Navy Commissions INS Nipun: India’s New Deep-Sea Diving and Submarine Rescue Vessel
The Indian Navy commissioned INS Nipun, its second indigenously built Nistar-class Diving Support Vessel (DSV), at the Naval Dockyard in Mumbai on 31 August 2026.
INS Nipun is not an ordinary naval ship. It has been built for specialised work below the sea surface — supporting deep-sea divers, carrying out underwater intervention and salvage, and assisting in the rescue of personnel from a submarine in distress.
For UPSC students, the importance of the ship goes beyond another addition to the Navy’s fleet. INS Nipun brings together three themes that regularly appear in General Studies: maritime security, submarine rescue capability and indigenous defence manufacturing.
Why is INS Nipun in news?
INS Nipun was formally inducted into the Indian Navy in Mumbai in the presence of Chief of the Naval Staff Admiral Krishna Swaminathan.
It is the second Diving Support Vessel of the Nistar class. Its sister ship, INS Nistar, is already serving with the Eastern Naval Command.
Nipun will strengthen the Navy’s ability to undertake specialised underwater operations on the western side of the country. Together, the two ships give the Navy a much stronger ability to support deep-sea and submarine rescue operations across India's maritime areas.
The ship was built by Hindustan Shipyard Limited (HSL), Visakhapatnam, and had been delivered to the Indian Navy on 30 July 2026 after outfitting and trials.
Nearly 75% of its content is indigenous, making the project another important step in India's effort to reduce dependence on foreign suppliers for complex naval platforms.
What exactly is a Diving Support Vessel?
A Diving Support Vessel, or DSV, is a specialised ship designed to support divers working deep underwater.
Normal diving becomes increasingly difficult as depth increases. Divers may need specialised breathing systems, pressure chambers, medical support and a stable platform from which underwater work can be carried out safely.
A DSV brings these facilities together on a single ship.
INS Nipun can support operations such as:
- deep-sea diving,
- underwater inspection,
- repair work,
- salvage operations,
- diver monitoring,
- submarine rescue support, and
- specialised underwater intervention.
This makes the ship useful not only during emergencies but also during regular naval maintenance and underwater operations.
What is saturation diving?
One term students may come across while reading about INS Nipun is saturation diving.
At great depths, divers are exposed to very high pressure. If they repeatedly return to the surface after each dive, they require lengthy decompression and face serious health risks.
In saturation diving, divers remain in a pressurised environment for an extended period and travel between their living chamber and the underwater worksite.
The advantage is that they need to undergo major decompression only at the end of the entire diving cycle rather than after every individual dive.
This allows trained divers to work at considerable depths for longer periods.
INS Nipun has specialised equipment to support deep-sea saturation diving.
Current reports on the commissioning place its diving support capability at depths of up to 300 metres.
Why is submarine rescue capability important?
Modern submarines can operate for long periods far below the surface. But if a submarine suffers a major accident and cannot surface, rescuing its crew becomes extremely difficult.
The Navy needs specialised systems that can:
- locate the distressed submarine,
- reach it underwater,
- establish a rescue connection, and
- safely bring personnel back to the surface.
This is where INS Nipun becomes particularly important.
The ship can serve as a mother ship for a Deep Submergence Rescue Vessel (DSRV).
A DSRV is a specialised underwater rescue vehicle that can descend to a submarine in distress and help evacuate its crew.
INS Nipun provides the larger surface platform required to carry, support and operate such rescue systems at sea.
DSV and DSRV are not the same
This distinction is important for Prelims.
INS Nipun is a Diving Support Vessel (DSV).
It is not itself the Deep Submergence Rescue Vessel.
The DSV is the larger support ship operating on the surface.
The DSRV is the specialised rescue vehicle that can go underwater to assist a distressed submarine.
Therefore:
DSV = support/mother ship
DSRV = underwater submarine rescue vehicle
UPSC can easily turn this distinction into a statement-based question.
Role of Remotely Operated Vehicles
INS Nipun is also equipped to work with Remotely Operated Vehicles (ROVs).
ROVs are unmanned underwater vehicles controlled from a ship or another surface platform.
They can be used where sending human divers may be difficult or dangerous.
In diving-support operations, ROVs can help with:
- monitoring divers,
- underwater inspection,
- locating objects,
- observing damaged structures, and
- salvage operations.
This combination of human divers and remotely operated systems gives a DSV much greater flexibility.
Precise station-keeping matters
A diving vessel cannot drift freely while divers are working hundreds of metres below the surface.
It needs to maintain its position with considerable accuracy despite waves, wind and sea currents.
INS Nipun therefore incorporates modern systems for navigation, platform management and precise station-keeping.
This may sound like a small technical feature, but it is essential for safe deep-sea diving.
If the ship moves significantly while divers, cables or underwater vehicles are deployed, the operation can become dangerous.
Why does INS Nipun matter for India's maritime security?
India's maritime interests extend far beyond its coastline.
The country depends heavily on the sea for trade, energy supplies and strategic connectivity. At the same time, the Indian Navy operates submarines and surface vessels across a vast maritime region.
As India's underwater fleet grows, the supporting infrastructure also has to expand.
A submarine fleet without adequate rescue capability carries an obvious operational risk.
INS Nipun helps reduce this vulnerability.
1. Better submarine rescue preparedness
The ship provides a dedicated platform from which submarine rescue systems can operate.
This becomes particularly important when an underwater emergency occurs far from the coast.
2. Stronger deep-sea intervention capability
Naval infrastructure extends below the surface.
Underwater equipment, cables, ship hulls and other systems may require inspection, maintenance or repair.
A specialised diving vessel allows such work to be carried out more safely and effectively.
3. Support for salvage operations
Ships, aircraft or equipment lost at sea may need to be located and recovered.
ROVs and specialised diving systems can play an important role in such operations.
4. Humanitarian and disaster-relief role
The ship can also support Humanitarian Assistance and Disaster Relief (HADR) operations.
Specialised diving and underwater capabilities can become valuable after maritime accidents, natural disasters or damage to coastal and offshore infrastructure.
5. Two-coast capability
INS Nistar already provides such capability on the eastern side.
With INS Nipun strengthening the Western Naval Command, the Navy is better placed to respond to underwater emergencies on either coast rather than depending on a single specialised platform.
Aatmanirbhar Bharat angle
Another reason INS Nipun deserves attention is the way it was built.
The ship was designed and constructed in India by Hindustan Shipyard Limited, a defence public-sector shipyard based in Visakhapatnam.
According to the Ministry of Defence, nearly 75% of the ship's content is indigenous.
Building a specialised DSV is considerably more demanding than building a simple transport vessel.
It requires integration of:
- diving systems,
- underwater intervention equipment,
- medical facilities,
- navigation systems,
- station-keeping technology,
- rescue equipment, and
- complex ship-management systems.
The ability to build such vessels domestically indicates that India's defence shipbuilding ecosystem is gradually moving towards more complex naval platforms.
This is important because self-reliance in defence is not simply about replacing imports. It also involves developing domestic design skills, specialised manufacturing, systems integration and a supply chain capable of maintaining equipment throughout its life.
Hindustan Shipyard Limited
Hindustan Shipyard Limited (HSL) is located at Visakhapatnam.
It is a public-sector shipyard under the Department of Defence Production, Ministry of Defence.
Its activities include:
- shipbuilding,
- ship repairs,
- submarine refits, and
- construction of specialised maritime platforms.
The construction of the Nistar-class Diving Support Vessels shows HSL's increasing role in building technologically specialised ships for the Indian Navy.
INS Nistar and INS Nipun
Students should remember the pair together.
INS Nistar
- First ship of the class
- First indigenous Diving Support Vessel
- Commissioned in 2025
- Associated with the Eastern Naval Command
INS Nipun
- Second ship of the Nistar class
- Commissioned on 31 August 2026
- Commissioned at Mumbai
- Strengthens underwater capability of the Western Naval Command
Together, they considerably improve India's ability to undertake deep-sea diving and submarine rescue operations.
Why the capability matters in the Indian Ocean
The Indian Ocean is becoming increasingly important to India's strategic interests.
India must deal with both traditional and non-traditional maritime challenges, including:
- growing naval activity by major powers,
- protection of sea lanes,
- piracy,
- maritime terrorism,
- smuggling,
- underwater security,
- protection of offshore infrastructure, and
- safety of naval personnel.
Submarine operations form an increasingly important part of naval strategy because submarines can operate with a high degree of secrecy.
But a larger submarine fleet also creates a greater need for search, rescue and underwater support capabilities.
A ship such as INS Nipun therefore acts as an important support element of India's wider naval modernisation.
UPSC PYQ Connection
This development has a direct link with a question asked in UPSC Mains 2022, GS Paper III:
“What are the maritime security challenges in India? Discuss the organisational, technical and procedural initiatives taken to improve maritime security.”
INS Nipun provides a fresh example for the technical capability part of such an answer.
A student discussing India's maritime-security preparedness can use examples such as:
- specialised submarine rescue systems,
- Diving Support Vessels,
- Deep Submergence Rescue Vehicles,
- underwater surveillance and intervention technology,
- indigenous naval shipbuilding, and
- stronger operational capability on both coasts.
The important point is not to write that INS Nipun alone “solves” India's maritime-security challenges.
It should be used as an example of how India is improving a specialised part of its maritime capability.
Prelims Focus
Remember these facts:
INS Nipun
- belongs to the Nistar class;
- is a Diving Support Vessel;
- is the second vessel of the class;
- was commissioned on 31 August 2026;
- was commissioned at the Naval Dockyard, Mumbai;
- was built by Hindustan Shipyard Limited, Visakhapatnam;
- supports deep-sea diving and underwater operations;
- can support submarine rescue missions;
- can serve as a mother ship for a Deep Submergence Rescue Vessel;
- uses specialised diving systems and ROV-supported capabilities;
- has nearly 75% indigenous content.
Prelims Trap Box
Statement 1
INS Nipun is a Deep Submergence Rescue Vehicle.
Incorrect.
INS Nipun is a Diving Support Vessel. It can act as the mother ship for a Deep Submergence Rescue Vessel.
Statement 2
INS Nipun belongs to the Nistar class.
Correct.
Statement 3
INS Nipun was constructed by Hindustan Shipyard Limited.
Correct.
Statement 4
The primary role of a Diving Support Vessel is air defence of a carrier battle group.
Incorrect.
Its specialised role relates to diving, underwater intervention and rescue support.
Statement 5
Remotely Operated Vehicles can assist in underwater monitoring and salvage operations.
Correct.
Possible UPSC Prelims Question
With reference to INS Nipun, consider the following statements:
- It is a Nistar-class Diving Support Vessel.
- It can act as a mother ship for a Deep Submergence Rescue Vehicle.
- It was built by Mazagon Dock Shipbuilders Limited.
Which of the statements given above are correct?
A. 1 only
B. 1 and 2 only
C. 2 and 3 only
D. 1, 2 and 3
Answer: B
Statements 1 and 2 are correct.
Statement 3 is incorrect. INS Nipun was built by Hindustan Shipyard Limited, Visakhapatnam.
Possible UPSC Mains Question
The strength of a modern submarine fleet depends not only on combat platforms but also on reliable underwater rescue and support infrastructure. Discuss in the context of India's maritime security preparedness.
Points for the answer
A good answer can include:
- growing strategic importance of submarines;
- risks associated with deep-sea submarine operations;
- need for rapid rescue capability;
- role of Diving Support Vessels;
- role of Deep Submergence Rescue Vehicles;
- underwater inspection and salvage capability;
- stronger preparedness on India's eastern and western coasts;
- importance of indigenous defence shipbuilding;
- development of specialised maritime technology.
Mains-ready takeaway
INS Nipun should be seen as part of the support architecture behind naval power.
Warships and submarines usually attract more attention, but maritime capability also depends on rescue vessels, maintenance infrastructure, surveillance networks, logistics ships and specialised technical platforms.
By adding a second indigenous Diving Support Vessel, India is strengthening an area of naval preparedness that becomes increasingly important as its underwater operations expand.
30-Second Revision
What?
INS Nipun
Type:
Diving Support Vessel
Class:
Nistar class
Which vessel of the class?
Second
Commissioned:
31 August 2026
Where?
Naval Dockyard, Mumbai
Built by:
Hindustan Shipyard Limited, Visakhapatnam
Main role:
Deep-sea diving and underwater support
Submarine rescue:
Yes
DSRV role:
Can act as its mother ship
Other capability:
Underwater intervention, diver support and salvage
Indigenous content:
Nearly 75%
UPSC relevance:
GS Paper III — Maritime Security, Defence and Indigenous Defence Manufacturing
Sources
Press Information Bureau, Ministry of Defence — Commissioning announcement
Official PIB release on INS Nipun
Press Information Bureau, Ministry of Defence — Delivery and technical details
Official PIB release on delivery of Nipun
Akashvani News — 31 August 2026 commissioning update
Indian Navy commissions INS Nipun in Mumbai
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