What does AGL stand for in aviation terminology?

AGL stands for Above Ground Level in aviation terminology. This term is crucial, as it is used to define altitude or height measurements in relation to the ground rather than sea level. When pilots and air traffic controllers communicate altitude, they often refer to AGL to ensure clarity about the position of an aircraft concerning the actual terrain or runway elevation. For example, an aircraft flying at 1,000 feet AGL is 1,000 feet above the ground surface beneath it, which can be particularly important when flying in hilly or mountainous areas where the elevation of the ground could significantly differ from sea level. Understanding AGL helps aviation professionals make safe operational decisions, especially during takeoff, landing, and low-altitude flight.