Final approach fix (FAF) Regulation
Final approach fix (FAF) defines the beginning of the final approach segment and the point where final segment descent may begin.
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The fix from which the IFR final approach to an airport is executed, and which identifies the beginning of the final approach segment. An FAF is designated on government charts by a Maltese cross symbol for nonprecision approaches, and a lightning bolt symbol for precision approaches.
Guidance: Pilot's Handbook of Aeronautical Knowledge, p. G-12