What does AGL stand for in aviation operations?

In aviation operations, AGL stands for "Above Ground Level." This measurement refers to the height of an aircraft or object above the surface of the Earth directly below it, not including any topographical features such as mountains or buildings. AGL is a critical measurement used in various aspects of aviation, including flight planning, navigation, and air traffic control. It helps pilots understand their altitude in relation to the ground, which is essential for safe operations, especially during takeoff and landing phases.

The term helps differentiate between the altitude of an aircraft relative to the ground and the altitude relative to sea level, which is known as MSL (Mean Sea Level). Understanding AGL is particularly important in scenarios where terrain features may affect flight safety and performance.