"Ron Lee" wrote in message
...

So if I am circling over my airport (00V) at about the same altitude
as a 737 coming into COS, my altitude is unverifed by COS approach,
and the 737 path will intersect mine within a mile or closer, the COS
approach controller will leave it to the pilot to avoid a midair?


Strictly the pilot's responsibility under those conditions. The controller
should issue a traffic advisory, and may suggest a course of action to avoid
the traffic. But that's it.