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Old 26th Oct 2005, 16:52
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Alex Whittingham
 
Join Date: May 1999
Location: Bristol, England
Age: 65
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Spoofed, I would think. Of course the Mode C transmits pressure altitude information to the nearest 100ft not the QNH-based altitude. Do you have a filter on your display which converts the output to altitude using the QNH of the day?
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