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In page 705 Naval Air Squadron:

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The squadron gradually became responsible for the basic flying training of Royal Naval helicopter pilots and was re-equipped during the 1950s with the Westland Dragonfly, the Hiller HT1 and the Sikorsky S55. The squadron moved to RNAS Culdrose in 1957 where the later marks of Hiller and Whirlwind were introduced. These types were replaced in 1974 by the Westland Gazelle HT.2.[1] Between 1975 and 1992 the instructors of the squadron performed as the 'Sharks' helicopter display team at up to 20 air displays every year both in the UK and abroad.[2]