• INS Viraat was a Centaur-class aircraft carrier of the Indian Navy. It was acquired by India from Royal Navy of the United Kingdom in 1987. • INS Viraat was formally decommissioned from Indian Navy in 2017. • Presently INS Vikramaditya is the flagship aircraft carrier of the Indian Navy. • INS Rajput is a guided-missile destroyer. INS Chakra and INS Khanderi are attack submarines of the Indian Navy.