Thread: NASA WB-57 back in the deployment cycle
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Old 02-12-2013 | 09:08 AM
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rickair7777
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From: Engines Turn or People Swim
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Originally Posted by Dougdrvr
Once you get above FL600, you can cancel IFR and turn off your transponder
Yes, FL600 is the highest flight level. Above that is undefined / uncontrolled airspace (I was making a joke about FL900).
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