"Newps" wrote in message
news:PXi7c.54180$Cb.838268@attbi_s51...




BTIZ wrote:

If your
altimeter setting is not set to "local", his computer radar will
misinterpret the altitude ModeC information from your aircraft.



Your mode C reports a 29.92 altitude to ATC. ATC adjusts your reported
altitude for the local altimeter setting. You have no way of affecting
what your mode C reports, other than actaully changing altitudes.

Interesting - in the UK flying IFR means setting 1013mb. 29.92 above the
transition altitude so the pilots altimeter reads the same as the ATC.