India on 18 October 2016 completed its nuclear triad by inducting country's first indigenously-constructed nuclear submarine INS Arihant into service. INS Arihant was formally commissioned by Navy Chief Admiral Sunil Lanba in August 2016. INS Arihant is the lead ship of India's Arihant class of nuclear-powered ballistic missile submarines. The 6000 tonne vessel was built under the
Advanced Technology Vessel (ATV) project at the Ship Building Centre in the port city of Visakhapatnam. It was launched on 26 July 2009, the anniversary of Vijay Diwas (Kargil War Victory Day) by the then Prime Minister of India, Manmohan Singh.
• After fitting out and extensive sea trials, on 23 February 2016, Arihant was confirmed as ready for operations, and was quietly commissioned in August 2016.
• It first of the expected five in the class of submarines designed and constructed as a part of the Indian Navy's secretive ATV project.
What is nuclear triad?
• A nuclear triad refers to the nuclear weapons delivery of a strategic nuclear arsenal which consists of three components: strategic bombers, intercontinental ballistic missiles (ICBMs), and submarine-launched ballistic missiles (SLBMs).
• The purpose of having a three-branched nuclear capability is to significantly reduce the possibility that an enemy could destroy all of a nation's nuclear forces in a first-strike attack.
• The triad also ensures a credible threat of a second strike, and thus increases a nation's nuclear deterrence.
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