Earlier, in February, the country got its first indigenously built nuclear armed submarine INS Arihant after it was declared ready for operations.

The Arihant is heralded as a remarkable technological achievement for the Indian Navy by defence experts, and makes India one of the few countries in the world which have mastered the ability to design and build an SSBN (ship submersible ballistic nuclear).

The 6,000-tonne submarine was built with Russian help, and went critical in 2013.

The submarine's design is based on the Russian Akula-1 class submarines and its 83 MW pressurised water reactor has been built with significant Russian assistance.

The submarine has a 100-member crew trained by Russian specialists.