"O. Sami Saydjari" wrote in message
...

I just talked to local FSS (Green Bay), and they say that filing
direct...KISW (Wisconsin Rapids) to KHEF (Manassas, VA) is an acceptable
route.


That's true as long as the Minneapolis Center computer has KHEF stored, that
may not be the case.



The end points have ground reference NAVAIDs. But, at least
Green Bay does not think I would require intermediate waypoints. I
wonder if the AIM guidance is out of date? Besides, how does one find
out where the limits of the ARTCC's are....look for the scraggly lines
in the Enroute IFR charts?


Bingo.



What if your direct flight does not happen
to go through a NAVAID in an ARTCC?


All that matters is that each ARTCC computer recognizes the fixes it's asked
to process. It doesn't matter if those fixes are navaids, airports, or
intersections.