AGL Federal Aviation Regulations Instrument Flight Rules 
Pilot Institute
MAY 25, 2024
Checking NOTAMs before flight is required by Federal Aviation Regulations (FAR 91.103). The Purpose of NOTAMs A Notice to Air Mission (NOTAM) is a bulletin issued by a country’s aviation authority. These include changes made to instrument approaches, STARs, SIDs, and IFR airways.
Pilot Institute
MARCH 6, 2025
AGL Above Ground Level AGL is simply a way to tell the basis from which any given height or altitude is measured. Simply put, 400 feet AGL means that the 400 feet is measured from the underlying ground surface above the specific airspace. These are all the rules that govern aviation activities in the United States.
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