Hello while I was flying autopilot showed strange speed.Can someone explain what it mean
What do you mean by strange speed?
Don’t see anything strange here but 275 is your airspeed and 452 is your Ground Speed.
This is not strange, this is mach speed :)
(S)He’s talking about the Mach value (s)he sees on their autopilot.
Your speed indicator on the autopilot automatically changes to Mach value at FL280. Mach 1 is the speed of sound, so M0.8 is 80% the speed of sound.
FIY: The 737 cruises at Mach 0.78.
This may help you out
And also welcome to the community
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