If your SOP is to fly approches QNH then why not fly approaches in CIS on QNH too?
If you put QFE on the altimeters the EGPWS thinks you are lower by exactly the TDZE.
The GPWS will give terrain warnings for AP elev above 300', if I remember rightly if you do the approach on QFE. (VKO elev is 700' and Almaty 2200?) Riga volmet gives the QNH for some of the airports also for a double check. QNH can sometimes be obtained from approach control.
QNH = QFE + TDZE/27.
Converting metric Height to imperial altitude is no more difficult than converting metric height to imperial height. The conversions are on the approach chart.
Keeping SOP's unchanged as far as possible by flying QNH to compare with altitude with MSA, and by keeping the EGPWS working correctly is surely safer all round by reducing risk of CFIT.
D
Last edited by Dumbledor; 7th Apr 2010 at 12:19.