The case I was describing was the traffic was known and not all units have 3nm
If both traffic are working the same unit and one VFR and the other CAT under a deconfliction it doesn't matter that the VFR can see the IFR they will still be radar seperated. Under CAS rules they don't have to be.
So you have the crazy situation that Class G airports try and keep a 10 mile by however long they normally vector the finals for sterile bit of airspace on the instrument approach and it doesn't matter what the VFR can see they will be controlled away from this. Where as in CAS there wouldn't be a problem.
Most companys SOP's tell pilost they have to take the best service available so they can't drop to a traffic service. And the units have usually got an agreement with the operator to provide a deconfliction service so the controller won't drop the service because then the crew will write a report. The the CAT is paying so the VFR traffic get moved and can collect a 10-20 mile diversion off route and usually gets dumped once clear when the controller has lost interest in them.
The more adaptable controllers will chuck both of you to tower and let them deal with it under there rules traffic permitting, but some units will hold both of you on radar.
Last edited by mad_jock; 26th Aug 2012 at 11:49.