What does AGL stand for in aviation terminology?

AGL stands for Above Ground Level in aviation terminology. This measurement is crucial in various aviation contexts, particularly in relation to altitude and elevation. When reporting altitude, pilots and drone operators often use AGL to specify how high they are flying above the terrain directly beneath them, rather than above sea level (which would be indicated by MSL, or Mean Sea Level).

This distinction is particularly important for operations in proximity to obstacles, such as buildings or trees, where knowing the height above the ground is essential for maintaining safe flying operations and avoiding collisions. For instance, when flying drones under the FAA Part 107 regulations, operators must often monitor their altitude in AGL to remain compliant with altitude restrictions and to ensure safety.

The other terms provided, while they may seem plausible, do not have recognized meanings in aviation terminology that would align with AGL. Therefore, understanding AGL is vital for both safety and regulatory compliance in aviation UAV operations.