QNH, is this something to do with the MSL of the closest coast line ? are there any other "q"S for example QFE thanks by telling me the meaning for them and what they do
2007-12-04 05:35:16 · 3 answers · asked by Craig S 1 in Cars & Transportation ➔ Aircraft
QFE, QNE, QNH, and many of the other Q-codes are listed online.
2007-12-04 05:51:07 · answer #1 · answered by Mark 6 · 0⤊ 1⤋
To the good words of Charles M, I would like to add a little known Q code related to atmospheric pressure, which is QFF. It is pretty much the same as QNH and it is not commonly used in aviation, at least not with ATC. While QNH is the pressure at sea level, calculated from the airfield pressure and added with the pressure based on the Standard Atmosphere equal to the airfield's elevation, QFF has that to vary according to monthly or weekly average of local atmosphere. As you know, altitude readings are lower in the winter due to denser air. QNH doesn't take that into account but QFF does. QFF is what is used by meteorologists when they draw the isobar curves.
2007-12-04 07:05:26 · answer #2 · answered by Michel Verheughe 7 · 1⤊ 0⤋
QNH is the atmospheric pressure at sea level.
QFE is the atmospheric pressure at a specific field.Russia and the UK among others still use QFE.
The thing with QFE is that the altimeter will read 0 when you touchdown, giving pilots more situational awareness, especially if there aircraft doesn’t have a radar altimeter.
QNE is Pressure altitude, that is the altitude you get when you set the barometric scale at youre altimeter at 29.92 inches of mercury.
Other Q-Codes are used for direction.
QUJ is the true Bearing twoards a station.
QTE is the true Bearing From a station.
QDM is the magnetic bearing to a station.
QDR is the magnetic bearing from a station.
2007-12-04 06:09:04 · answer #3 · answered by Charles 5 · 1⤊ 0⤋