With its 83MW pressure water reactor going critical, India's first SSBN, the Arihant is all set for sea acceptance trials that will sea it stretch its legs at depths for the first time in the Bay of Bengal off the coast of Visakhapatnam. The vessel has been embroiled in harbour acceptance trials (HATs) for the last three years since its launch in July 2009.

The Arihant is likely to spend about 18 months in sea trials before it is commissioned into service. By that time, it's follow-on boat, tentatively titled Aridaman, will be launched as well at the Shipbuilding Centre in Vizag. Arihant's sea acceptance trials will also later include integration and testing of the K-15 missile, apart from other weapons. Once all tests are complete, the Arihant will be commissioned into service and commence deterrent patrol in the Indian Ocean.