INS Viraat was a Centaur-class aircraft carrier of the Indian Navy. INS Viraat was the flagship of the Indian Navy before INS Vikramaditya was commissioned in 2013. The ship was completed and commissioned in 1959 as the Royal Navy's HMS Hermes, and decommissioned in 1984. It was sold to India in 1987. INS Viraat was commissioned into the Indian Navy on 12 May 1987, and served for almost 30 years.