In a major step in validation of indigenous defence technologies, the Indian built nuclear-powered ballistic missile submarine Arihant completed its harbour trials and entered the sea here on Monday.

Built under the highly secretive Advanced Technology Vessel project monitored directly by the Prime Minister’s Office, the nuclear-powered submarine emerged from the breakwaters of the Visakhapatnam Harbour under the watchful gaze of a low flying helicopter. The 112 metre, 6000 tonne partially submerged Arihant glided into the Bay of Bengal as part of its sea trials, sailing north along the coast before disappearing into the mist.

The event coincided with the maiden visit to the city of Defence Minister Manohar Parrikar. The Minister was also briefed by the officials of the Eastern Naval Command.