What does the abbreviation 'AGL' stand for in aviation?

The abbreviation 'AGL' stands for "Above Ground Level" in aviation, which is a critical term used to describe the altitude of an aircraft in relation to the ground directly beneath it. This measurement is essential for various operational considerations, such as maintaining appropriate altitudes for safe flight, navigating obstacles, and ensuring compliance with regulations regarding airspace.

Understanding AGL is particularly important for pilots, as it helps them assess their height during takeoff, landing, and flight maneuvers. For instance, a pilot might need to maintain a specific altitude AGL when flying near tall buildings or during approach patterns to avoid potential collisions with terrain or other obstacles.

Other options listed do not accurately reflect any standardized aviation terms associated with altitude measurements.