`absolute-altitude` Related Article Results

Absolute Altitude (Above Ground Level) is the vertical distance between an aircraft or any object and the ground surface directly beneath it. Unlike Mean Sea Level (MSL), which is based on the average elevation relative to sea level, absolute altitude varies depending on local surface conditions. The AGL value is calculated based on the elevation of the ground surface at the aircraft’s current location and therefore changes along the flight path as terrain elevation varies. Measurement Methods A