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Old October 26th 07, 06:04 PM posted to rec.aviation.ifr
S Green
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Posts: 74
Default Pressure & temperature


"Peter" wrote in message
...

"akjcbkJA" wrote

In Europe its the easiest way to fail an IR checkride by failing to
compensate for the ISA deviation in the winter and being deemed to have
busted the limits


Is this your personal experience?

I've never heard of anybody here (UK) using anything other than the
published minima, directly.

One would be landing with the airport QNH set, and altimeter error
caused by non-ISA temperature is negligible at more or less any
airport in Europe that has an instrument approach.

And at high altitute airports one would not be using the airport QNH.
They have some other system. An altimeter is a pretty inaccurate
device once well away from the ground.


Its in the JAR instrument test standards and features within the learning
objectives for the ATPL Met exam.

Work it out. The difference is small on approach and greater at high
altitude but the examiner would be looking to see whether you have taken
account of the fact that temperature does make a difference.

In JAR land some say they are anal, others would take the view that they do
it properly.