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Old 29th December 2008 | 21:18
  #45 (permalink)  
172driver
 
Joined: Jul 2005
Posts: 1,929
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From: SoCal
About the masks, the flight manual of the columbia 400 say that canulas are allowed up to 18.000
Could that have to do with the US airspace being Class A above 18000ft ?
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