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Old May 5, 2014 | 5:22 pm
  #15  
DWooderson
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Originally Posted by darthbimmer
I've seen the IFE system display ground speeds of 750+ mph (near/over Mach 1) a few times while flying eastward over the Pacific. It depends on how strong the jet stream is.
Just to clarify though, 750 ground speed is not near/over Mach 1. Mach is a measure of the relative motion depending on the surrounding air velocity.
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