INS Nipun: Key Boost to India Deep-Sea Capabilities

Key Highlights & Summary 

• Commissioning of INS Nipun: The Indian Navy commissioned INS Nipun, the second Diving Support Vessel (DSV) of the Nistar class, in Mumbai, significantly augmenting the Western Naval Command\'s deep-sea diving, underwater intervention, and submarine rescue capabilities. 

• Indigenous Construction: Designed and constructed by Hindustan Shipyard Ltd (HSL), Visakhapatnam under a 2018 contract, the 9,000-tonne vessel follows its sister ship, INS Nistar, which was commissioned in July 2025.

 • Replacement of Legacy Platforms: INS Nipun replaces older Russian-origin submarine rescue vessels and reliance on shore-based facilities, overcoming legacy limitations in endurance, multi-domain operations, and long sea deployments. 

 • Advanced Saturation Diving & Operational Features: Equipped for deep-sea saturation diving, the vessel features a side diving stage, Remotely Operated Vehicles (ROVs) for underwater monitoring/salvage, and a self-propelled hyperbaric lifeboat for emergency crew evacuation.

 • Role as Submarine Rescue \'Mother Ship\': INS Nipun acts as a mother ship for Deep Submergence Rescue Vessels (DSRVs), allowing rapid deployment to evacuate trapped personnel from distressed submarines across the Indian Ocean Region (IOR). 

• Regional Strategic Impact: The induction strengthens India’s role as a Net Security Provider in the IOR, enhancing its capacity to provide submarine rescue assistance and maritime support to regional partner navies.

 Essential Definitions 

• Diving Support Vessel (DSV): A specialized naval platform designed to sustain complex underwater intervention, salvage, inspection, and diving operations for extended durations in deep waters. 

• Deep-Sea Saturation Diving: A specialized diving technique allowing divers to live in pressurized environments onboard or underwater for long periods, enabling work at extreme depths without decompression delays. 

• Deep Submergence Rescue Vessel (DSRV): A miniature submersible deployed from a mother ship specifically designed to dock with distressed submarines and evacuate crew members during deep-sea emergencies. 

Legal and Constitutional Framework 

• United Nations Convention on the Law of the Sea (UNCLOS), 1982: Establishes international maritime legal rights regarding freedom of navigation, search and rescue (SAR) duties, and territorial sea regulations. 

• Article 51 of the Indian Constitution: Directs the State to promote international peace and security, underpinning India’s security cooperation and maritime diplomacy in the IOR. 

• Maritime Search and Rescue (SAR) Mandate: Operates under international SAR conventions, reinforcing India’s commitments under the Indian Ocean Rim Association (IORA) framework.

• Defence Procurement Procedure (DPP) / Defence Acquisition Procedure (DAP): Guided the indigenous contract awarded to HSL, supporting self-reliance (Aatmanirbharta) in defense manufacturing. Conclusion The commissioning of INS Nipun represents a milestone in India\'s pursuit of indigenous defense manufacturing and deep-sea intervention readiness. By combining saturation diving infrastructure with DSRV support capabilities, the Indian Navy secures vital submarine rescue redundancy while cementing its strategic role in Indian Ocean maritime security. 

UPSC Relevance 

• GS Paper III (Internal Security & Science & Technology): Highly relevant for questions on defense indigenization, technology transfer, naval modernization, and security challenges in the Indian Ocean Region.

 • GS Paper II (International Relations): Important for analyzing India’s soft-power diplomacy, regional maritime partnerships, SAGAR initiative, and Net Security Provider posture in the IOR.