In 1953 the Commander-in-Chief, Home Fleet, gained an additional NATO responsibility as Commander-in-Chief, Eastern Atlantic, as part of SACLANT, and the Eastern Atlantic NATO military command structure was established at the Northwood Headquarters. The Commander-in-Chief Home Fleet still flew his flag however in HMS "Tyne" at Portsmouth. In 1960 the Commander-in-Chief Home Fleet moved to Northwood, in 1963 the Naval unit at Northwood was commissioned as HMS "Warrior" and in 1966 the NATO Channel Command (a post also held by the Commander-in-Chief Home Fleet) moved to Northwood from Portsmouth. The RAF completely vacated the site in 1969.