Required reading for pilots for more than 25 years, this handbook is used extensively as a reference source for the FAA Knowledge Exams and provides information for training and guiding student pilots. Including basic knowledge that is essential for all pilots, from beginning students to those pursuing more advanced pilot certificates, it introduces pilots to the broad spectrum of knowledge that will be needed as they progress through their pilot training. Principles of flight, aircraft and engine structures and systems, weight/balance and performance calculations, charts and navigation, weather theory, reports, forecasts, and flight manuals are among the subjects covered. Formerly published as an Advisory Circular (AC 61-23C), this new edition is now listed as an official FAA Handbook (#FAA-H-8083-25).