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Thread: Need advice about negative FL?
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Old 26th Jul 2011, 13:55
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WillDAQ
 
Join Date: May 2007
Location: Bristol
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If the pressure on the ground is significantly above 1013.25 (either due to weather or the ground being below sea level) then it's possible to get negative levels.

You'd just never normally see them as they're hidden by the transition altitude.
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