GE K0470, User Manual

Page: 34 / 78

PACE Pressure Indicators User Manual
[EN] English 3 - 9 K0470 Revision A
Note: In the Airfield Task Q codes can be used. These units are standardised three letter codes and
are available in aeronautical units (feet and metres). The codes used are:
• QFE - Atmospheric pressure at sea level, corrected for temperature and adjusted to
airfield elevation. When set on the altimeter it reads height.
• QNE - Atmospheric pressure at Sea level in International Standard Atmosphere (ISA)
1013.25 mbar.
• QFF - Barometric pressure at a place, reduced to Mean Sea Level (MSL) using the
actual temperature at time of observation as mean temperature.
• QNH - Atmospheric pressure at Mean Sea Level (MSL) (may be local, measured
pressure or a Regional Forecast Pressure (RFP). When set on altimeter it reads
altitude.
QNE QNH QFE
29.9212 inHg (1013.25 kPa)
Datum
Sea Level Reference Datum
(adjusted)
Runway
(on Earth’s surface)