It happens around ABZ all the time.The military are really good at steaming around 50ft below the base of the CTA,without talking.They usually squawk 7001 with mode c,but it's not verified.We have the base of the CTA, north and south down to 1500 ft and they still perform there even over high ground.
Thats interesting. All these PPL infringements getting attention, yet these military jet jockeys zipping around in and out of CAS in IMC...that has got to be a bigger threat to safety..given the closing speeds....
But I'm still curious about one thing. If no squawk/Mode A traffic inadvertently climbs into a CTA and embarks on a conflicting course with IFR traffic (assuming neither a/c has seen each other) the controller would not instruct the IFR to avoid because he/she is assuming the infringing traffic is below the base of the CTA?
Which that leads me to another question...does the conflict detection software running on the radar dispays also assume the undentified traffic is not infringing and therefore does not alert the controller??