Dennis Lee Bieber wrote: > Of course, the great circle arc, except for paths with start/end > latitude of 0 (equator) or with (lon1 - lon2) = 0, require a constant > variation in compass heading -- and I don't think IFR currently make use > of great circle arcs (and GPS to maintain them).
I'm not totally sure what you mean by IFR - but I know for certain that intercontinental flights do flight on great circles - as this saves considerable amounts of distance and thus time, fuel and money. And GPS isn't exactly news on multi-million-dollar heavy airplanes... Diez -- http://mail.python.org/mailman/listinfo/python-list
