2023 Edition. Printed in color.This handbook provides the basic knowledge that is essential for pilots. It introduces pilots to the broad spectrum of knowledge that will be needed as they progress in their pilot training. Except for the Code of Federal Regulations pertinent to civil aviation, most of the knowledge areas applicable to pilot certification are presented. This handbook is useful to beginning pilots, as well as those pursuing more advanced pilot certificates. This handbook supersedes FAA-H-8083-25B, Pilot's Handbook of Aeronautical Knowledge, dated 2016; the Pilot's Handbook of Aeronautical Knowledge Addendum A, dated February 2021; the Pilot's Handbook of Aeronautical Knowledge Addendum B, dated January 2022; and the Pilot's Handbook of Aeronautical Knowledge Addendum C, dated March 2023.