06:48 GMT, July 27, 2009 As DD India reports, India on Sunday inducted the country's first indigenously-built nuclear-powered submarine 'INS Arihant' in the Navy.

Launching the submarine in Vishakapatnam, Prime Minister Dr. Manmohan Singh declared that the country has no aggressive designs but has to take all measures to safeguard itself.

In a symbolic launching ceremony, Prime Minister's wife Gursharan Kaur broke a coconut on the hull of the submarine at its secret naval base 'Matsya' dockyard.

Along with Prime Minister, Defence Minister A K Antony, Navy Chief Admiral Sureesh Mehta and Andhra Pradesh Chief Minister Y S Rajasekhara Reddy were also present on the occasion.

Prime Minister Dr. Manmohan Singh stressed on the importance of striking capabilities from sea and said that India has neither aggressive designs nor it seeks to threaten anybody.

Speaking after launching INS Arihant in Vishakapatnam, he said that sea is increasingly becoming relevant in context of country's security and therefore our navy has a high responsibility.