 The squadron was embarked alternately aboard the carriers and during 1952 and 1953, spending most of its time on exercises in the Mediterranean.The squadron operated the Grumman Avenger and then the Fairey Gannet during 1954 and 1956, aboard and , before the decision was made to convert 820 Squadron as a helicopter squadron.820 disbanded on 2 December 1957 but were immediately re-formed the same day at , equipped with the Westland Whirlwind HAS.7.