The Westland Wessex was developed under license by Westland Helicopters and was the British version of the American Sikorsky Choctaw. It first flew in June 1958 and was produced until 1970. The HAS 1 version entered service with the Royal Navy in 1961 and was soon fitted with better avionics and equipment, becoming the HAS 3 which then entered service in 1967. The Royal Air Force started operating the Wessex in 1962 for Search and Rescue duties. While the Wessex didn’t have as great a payload as