This revised textbook, published for the Air Force ROTC program, contains a discussion of basic and essential understandings about air navigation. The first part of the book describes maps, air navigation charts, flight planning, and pilotage preflight. Basic differences between ground maps and air charts are described and the methods of expressing position, direction, distance, and time are explained. The last three chapters include a description of different types of navigation instruments and aids used in flight. (PS)