What is the proper interpretation of ASL in aviation context?

In aviation context, ASL stands for "Above Sea Level." This term is crucial when discussing altitudes, as it provides a common reference point for measuring the height of an aircraft or a structure in relation to the average level of the world's oceans. This is important for navigation, air traffic control, and safety, as it helps standardize altitude measurements across different regions and conditions.

Understanding that altitude is measured in relation to sea level allows pilots and air traffic controllers to maintain safe distances between aircraft, ensuring separation from terrain and obstacles. While the other interpretations listed might pertain to broader aviation topics, they do not represent the standardized usage of ASL regarding altitude measurement.