Apologies for the minor drift. Had to look up the Q Codes as was interested in what you guys were discussing.
If I am correct in my research
QFE = based upon field elevation of an airport.
QNH = Pressure based upon nil height i.e. sea level.
So am a little confused as to why ppl are talking about the difference between imperial/metric.
Again apologies for the thread drift - will go back to reading - would be appreciative if you could answer why one would be measured in different units to the other.