INS Arihant and INS Arighat are already on deep-sea patrols, and India is set to receive a Russian Akula-class nuclear-powered attack submarine on lease by 2028. In parallel, the sixth diesel-electric Kalvari-class submarine, INS Vagsheer, is expected to be commissioned in December this year.

While authorities remain tight-lipped about it, reports say that the indigenously built nuclear-powered ballistic missile (SSBN) submarine, code-named S-4*, has been launched

India launched its fourth nuclear-powered ballistic missile submarine (SSBN) this week at the Ship Building Center (SBC) in Visakhapatnam, enhancing its nuclear deterrence capabilities against potential adversaries,

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The submarine was commissioned on October 16, 2024, during the launch ceremony of the Ship Building Centre in Visakhapatnam

The new nuclear-powered ballistic missile submarine was launched after the Cabinet Committee of Security (CCS) approved the construction of two such submarines on October 9.

The newly launched S4 boasts about 75 per cent indigenous parts and is equipped with K-4 nuclear ballistic missiles, capable of hitting targets up to 3,500 km away