Which of the following represents the height above mean sea level?

The correct answer is AMSL, which stands for Above Mean Sea Level. This measurement is crucial in aviation as it indicates the altitude of an aircraft relative to the average sea level, providing a standard reference that is used for navigation and safety. When pilots receive altitude information, it is often expressed in AMSL, enabling them to maintain safe vertical separation from terrain and other aircraft.

In contrast, AGL (Above Ground Level) measures height relative to the earth's surface directly beneath the aircraft, which can vary significantly depending on the geography. QNH is a specific atmospheric pressure setting used at sea level to help pilots determine their altitude above sea level. VOR (VHF Omnidirectional Range) is a type of radio navigation system for aircraft, which does not pertain to altitude measurements. Understanding these distinctions is essential for safe operation in the aviation environment, where precise altitude information influences both navigation and safety protocols.