Originally Posted by
JamesGBC
Pontius Navigator. Thanks for the excellent explanation, I did not consider the ground speed changing the track. You did remind me to consult my 1975 Ground studies for pilots, and perhaps navigators used to 50s and 60s radio and star navigation could solve the problem.
Sadly that was simplified. You would also have to consider the width of each arc. You could also refine (complicate) the groundspeed
vector by applying wind to assumed airspeed.