AltimeterSetting European Supplement

urn:aero:ses:eurocontrol:airm:1.0.0:ContextualModel:ATMBusinessTerms:WMO:AltimeterSetting

Altitude setting (also known as QNH) is defined as barometric pressure adjusted to sea level. It is a pressure setting used by pilots, air traffic control (ATC), and low frequency weather beacons to refer to the barometric setting which, when set on an aircraft's altimeter, will cause the altimeter to read altitude above mean sea level within a certain defined region.

Source: WMO METeorological Community Exchange (METCE)