"Teacherjh" wrote in message
...

Well, if some time passes between one transmission and another, then
communications will need to be re-established.


Why?



How much time? Well, we can yak all day about that. Certanly
if the first transmission is on the ground before runup, and the next
transmission is in the air, it would be reasonable to conclude that
we are no longer talking about "the same conversation", and (as
per the original scenario) he can enter the class C upon the new
establishment of communications.


But that's not per the original scenario.

Let's say communications have been established and you're transiting Class C
airspace. The controller has spoken with several other aircraft, but hasn't
spoken with you since communications were established. At what point are
you no longer maintaining communications and thus in violation of FAR
91.130(c)(1)?