Jose wrote:
Every flight, every day, by the military is on a flight plan.
Even those flights on VFR MTRs?
Yes.

Does ATC track those flights in real time, at least with non-radar
position reporting? If so, then ATC should be able to provide better
information that a civilian pilot could use to determine whether or not
to transition a route at a particular point at a particular time.

Jose

When I was an air traffic controller at the Denver Enroute Center we
would get a flight strip for, say, a B-52 entering a MTR. It's been a
while but the flight strip would have his entry time for the MTR and a
calculated exit time along with the altitude he'd be climbing to at the
exit point. We didn't track him at all while he was on the route; he
wasn't on radar and, given the nature of an MTR, it would be nearly
impossible to give a civilian pilot an accurate position report of the
B-52.

It's been several years since I've been a controller so things may have
changed.

--Walt Weaver