"Mxsmanic" wrote in message
...

No, it is not. It's especially dangerous for RVSM flight, but it's so
inaccurate that it should never be used for anything, except as a last
resort (if the altimeters disintegrate, or whatever).


It was posed as a possible means to adjust a pressure altimeter with no
radio. I'd say that it is better than nothing, in that case. Since you can't
be NORDO in the IFR system, separation is the responsibility of the pilot's
eyes anyway.

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Travis
Lake N3094P
PWK