World projection used in ND map
Hello all,
I have been wondering for a while what world projection model is used in the ND of modern aircraft like the 737 NG. I seem to remember that for regular tracks, the ND always draws straight magenta route lines. If the projection is Mercator, this would not be possible, since the line would need to be curved.
If it really draws straight lines only, which correctly follow the great circle track, I'm at a loss of what projection would be used.
So the question is, if you would enter 1 waypoint that is, say, 500 NM ahead, would you get a straight or a curved line in the ND?
Regards,
Marty