What does AGL stand for in aviation contexts?

In aviation, AGL stands for "Above Ground Level." This term is critical for pilots and air traffic controllers as it refers to the altitude of an aircraft relative to the terrain or surface directly below it. For instance, when a pilot reports their altitude as being 500 feet AGL, they mean they are flying 500 feet above the ground, which provides essential information for safe navigation, particularly during takeoff, landing, and low-level flights.

Other terms like "Ascent Gain Level," "At Ground Landing," and "Altitude Ground Level" do not reflect standard aviation terminology. Understanding that AGL specifically refers to altitude in relation to the ground helps clarify communication within aviation operations and enhances safety by ensuring everyone has a clear understanding of an aircraft's position relative to the terrain.