a lot of pilots waste money getting loggers and barographs calibrated for
no reason. Most never turn in a flight for a badge or record ever and even
those who do can have the calibration done AFTER the flight they want to
turn in just as easily as having it done ahead of time. The calibration
doesn't change or improve the logger in any way, it simply shows how much
its trace is off from actual pressure altitude. As far as I know even
contest flown that might brequire a secure logger don't require a
calibration to be legal.
tim
"dbrunone" wrote in message
...

Not sure about intervals but Gary Kammerer at Clearnav can hook you up




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dbrunone