SOURCE: IDRW.ORG.
India’s nuclear-powered ballistic missile submarine (SSBN) program continues to make significant strides, with the induction of the INS Arighaat (S3) into active service at the end of August 2024. Following in the footsteps of its predecessor, INS Arihant, the INS Arighaat marks a significant evolution in India’s strategic deterrence capabilities.
Commissioned in August 2016, the INS Arihant was India’s first indigenously built SSBN. The submarine has a displacement of 6,000 tonnes and is powered by an 83 MW pressurized light-water reactor (PLWR) using enriched uranium. Its successful integration into the Indian Navy represented a critical milestone in India’s pursuit of a credible sea-based nuclear deterrent.
The INS Arighaat, India’s second SSBN, retains the same reactor and dimensions as the Arihant but incorporates numerous technological upgrades. These enhancements are believed to include improved sonar systems, navigation, stealth features, and advanced fire-control systems, making it a more capable platform. The submarine, commissioned in August 2024, represents the maturation of India’s SSBN development and underscores the country’s commitment to strengthening its strategic assets.
India’s third SSBN, the INS Aridhaman (S4), is nearing completion and will soon join the fleet. While it is expected to retain the 83 MW reactor of its predecessors, the 83 MW reactor is upgraded based on the feedback received and many technological advancements that have been made over the years by the BARC. idrw.org team suggests that it now features better maintenance features and the crew that will operate it will also have enhanced safety measures.
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