Compass Questions ?
Hello,
Not a Pilot, but always interested in the engineering aspects.
This question came up, and I realize that I am not sure of a correct answer.
Regarding the compass heading that shows in the glass displays:
How is it derived ?
GPS ?
If not GPS, what ?
Is it then Magnetic or True ?
Does the Pilot have to correct for variation/declination changes during
a flight ?
Does aviation use True or Magnetic when discussing or flying ?
etc. ?
Thanks,
Bob
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