Why don't you ask the Transafrik guys in Angola? They do it every day and night and while it is exciting, it is not for the faint of heart...and how would it work out in an FMS fly by wire a/c? This type of approach requires real airmanship, not just button pushing relying on a computer...
That just reminded me of that transafrik/ tankers in the sky video I had heard of but never been able to watch.
I've tried a search here and it came back with a
transafrik topic but the link for the video seems long time dead now.
Anybody ?