India, April 4 -- India on Friday commissioned its new indigenously built nuclear-powered ballistic missile submarine - INS Aridaman - into service, adding muscle to the country's strategic deterrence.

The induction by Defence Minister Rajnath Singh at Visakhapatnam also enhanced second-strike capability and bolstered the naval component of the nuclear triad, it was learnt. Triad means the capability to launch nuclear weapons from land, air and sea. "It's not words but power, 'Aridaman'," Defence Minister Singh said in a cryptic social media post in Hindi on Friday morning.

The first nuclear submarine, INS Arihant, was commissioned in 2016, while the second submarine, INS Arighat, joined service in 2024 at Visakhapatnam. One more submar...