On Apr 18, 9:10*am, Stefan wrote:
WingFlaps schrieb:

Perhap we are at crossed purposes but an ARFOR does not refer to an
airfield -that's a METAR and not all fields issue them. So in this
case how can QNH give field elevation unless it's an ISA day?

Again: QNH gives *by definition* the field elevation. If an ARFOR gives
you a QNH, then it is related to one well defined spot on the surface.

BINGO! That's right, setting QNH on an altimeter DOES NOT does give
field elevation UNLESS it's issued for that field :-)

Cheers