Duke Studying A Compass The Duke of Edinburgh talking Navigational technique with Derek Cheeseman of Birmingham, as he studies a marine Gyroscopic compass at the Sperry Gyrescope company's Works at Great West Road, Brentford, Middlesex, today. The Duke, who is himself a sailor and air pilot, showed great interest in those Navigational instruments that keep ships and planes steasday. A keen sailor and airman, the Duke discusses the finer points of a marine gyroscopic compass with an engineer at a factory be inspected. February 24, 1953. (Photo by Reuterphoto).