Eric Cropper's RAF career started in 1943 and ended in 1968. It covered a period when the navigation of aircraft changed from astro, dead reckoning and drift bearings all plotted by pencil on charts, to press-button radio and satellite information that can instantly pinpoint a position anywhere on the planet to within 5 metres. The then vital skills of a good navigator are now mostly redundant. Ships, aircraft, trucks and cars seldom use maps let alone carry a navigator. This autobiography by one of the RAF's top exponents of both the ancient and modern forms of the art explains in considerable detail how this rapid and revolutionary improvement occurred in the air.This is a fascinating memoir of one of the RAF's senior navigational experts that explains both service life and the revolution in navigational techniques that took place during his service career.