This manual provides information on all phases of air navigation for navigators and student navigators in training. It develops the art of navigation from the simplest concepts to the most advanced procedures and techniques. The text contains explanations on how to measure, map, and chart the earth; how to use basic instruments to obtain measurements of direction, altitude, temperature, and speed; and how to solve basic navigation problems by dead reckoning and map reading. Special techniques used to navigate by radio, radar, and Loran; by using celestial concepts and procedures; and in polar areas are covered. There is information on flight publications, weather services, mission planning, inflight procedures, and low level navigation. The final chapters cover automatic navigation systems and aerial delivery. (Extensive diagrams, illustrations and photographs are included together with attachments on symbol definitions and term explanations.) (Author/KP)