What is the value of QNE when setting an altimeter?

The correct value of QNE when setting an altimeter is 1013.2 hPa. This value represents the standard atmospheric pressure at sea level in the International Standard Atmosphere (ISA) model. In aviation, pilots use this standard pressure setting as it provides a reference for altitude measurement, ensuring consistency and safety when flying.

Setting the altimeter to 1013.2 hPa (also known as the standard pressure setting) allows pilots to communicate their altitude relative to a known standard, which is crucial for maintaining safe vertical separation between aircraft.

Understanding that the QNE setting is crucial for accurate altitude readings helps pilots avoid potential hazards arising from pressure differences associated with weather systems. It establishes a common baseline for altimeter settings among all aircraft operating within a given airspace.