This is INS Arihant, First Made-in-India Nuclear Submarine

The INS Arihant, country's first made-at-home nuclear submarine is being built in top secret conditions at Visakhapatnam in Andhra Pradesh.

NDTV's Science Editor Pallava Bagla has accessed the first images of the 6,000-tonne vessel, the first of a class of three nuclear-powered ballistic missile submarines with a displacement of 6,000 tonnes.

She is designed to carry four nuclear-tipped submarine-launched ballistic missiles called the K-4 which have a range of 3,500 kilometres or a dozen Bo 5 missiles which can strike targets about 700 kilometres away.

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