The Flight Navigator Handbook provides information on all phases of air navigation. It is a source of reference for navigators and navigator students. This handbook explains how to measure, chart the earth, and use flight instruments to solve basic navigation problems. It also contains data pertaining to flight publications, preflight planning, in-flight procedures, and low altitude navigation. A listing of references and supporting information used in this publication is at Appendix A; mathematical formulas to use as an aid in preflight and in-flight computations are at Appendix B; chart and navigation symbols are at Appendix C.; and a Celestial Computation Sheet is at Appendix D.