james michael, it sounds like those GPS guided buzz bombs have got you flustered, and they hav'nt even been used ... yet
I will take this issue up again tommorow.
TCAS is not a traffic INFORMATION device
OZBUSDRIVER, the Avidyne TAS 600 in my little aircraft may not have all the bells and whistles of a pax jet TCAS, though it will show transponder equiped traffic, for example, orbiting around an airfield that I am approching under IFR.
The Avidyne TAS unit is self contained within the aircraft, and it reads other aircraft that have transponders - and those transponders are self contained within the aircraft. If the ATC system and/or the GPS system became inoperable for any reason what so-ever, the TAS unit in my aircraft will continue to show those transponder equiped aircraft.