What does QNE refer to?

QNE refers to the aircraft height above the standard datum plane, which is a crucial concept in aviation and metrics used for altitude reporting. The standard datum plane is an imaginary reference point that serves as a baseline for measuring altitude. When altimeters are set to QNE, they provide height readings in relation to this standard datum, which is essential for ensuring safe and consistent altitude reporting among aircraft.

This measurement is important for air traffic control and navigation since it enables pilots to maintain specific altitudes and avoid obstacles, as well as to have a common frame of reference for flight levels. Understanding QNE is vital for interpreting altitude information correctly and maintaining situational awareness during flight operations.