This might seem a bit odd, but indulge me...
What are the lateral crossing restrictions for passing a waypoint and can they be changed?
I fly almost exclusively in the Classic era... BOAC and Northwest routes from the 1950s. During the early part of this period, for areas outside the US, navigation was limited to the occasional NDB, but mostly RDF, LORAN A and celestial. All of the latter are doing well if they're with 5 miles of the actual position! Indeed, trans-Atlantic routes had a corridor 20 miles wide to hit to be considered on the route!
I can simulate RDF/and LORAN using a variety of methods and there is a sextant gauge for celestial nav.
I really want to use PF3 of or ATC because the Oceanic clearance facility is a brilliant way to simulate the long stretches without any comms other than HF; over North Africa and large parts of Asia for example. However, as far as I can see, PF3 expects a waypoint to be crossed within a couple of miles which makes it extremely difficult to comply using the methods above. Can this be extended to, say, 5 miles or more?
Finally, I realise I'm trying to make PF3 do what it probably wasn't designed to do, so it's no big deal if the answer is 'nope, it is the way it is'.
Thanks,
Andy