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​India’s Fourth Nuclear-Powered Launched in Visakhapatnam

  • 23 Oct 2024

In October, 2024, India launched its fourth nuclear-powered ballistic missile submarine (SSBN), S4*, at the Ship Building Centre in Visakhapatnam, marking another milestone in its naval capabilities.

  • The submarine, an advanced version of the earlier INS Arihant, further strengthens India's nuclear deterrence strategy.

Key Points

  • S4 Submarine Launch: The S4* SSBN was launched on October 16, 2024. It features significant indigenous content and improved capabilities compared to earlier submarines like INS Arihant.
  • Enhanced Capabilities: The S4* is larger and equipped with an advanced reactor. It can carry the K-4 submarine-launched ballistic missile (SLBM) with a range of 3,500 km, providing a greater standoff capability.
  • Nuclear Submarine Fleet: India now has two operational SSBNs, with the third, Aridhman (S4), undergoing sea trials and expected to be commissioned next year. The S4* launch enhances India’s underwater nuclear deterrence, a critical component of its nuclear triad.
  • Strategic Deterrence: India’s SSBN fleet is integral to its ‘Credible Minimum Deterrence’ and ‘No First Use’ nuclear policy, ensuring robust, survivable second-strike capability.