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chperplt said:In reality, how is ATC going to know what IAS you're flying at? They see groundspeed on their screen, not IAS.
Well if other aircraft at your altitude (and going same direction) are all doing 280 kt GS and you are doing 330 kt GS... guess what? You are doing 300 KIAS and (especially in ATL) you are getting a "Speeding Ticket"... It isn't hard for them to figure out....
chperplt said:I understand that...
I was flying through NY and on with BOS center.. Someone asked the controller if a "maintain max forward speed" was a clearance to do more than 250 below 10K, and the controller said officially 'NO", but there isn't any way he's going to know what you're really doing, or even care enough to say anything. Obviously not all controllers think alike..