It’s also not very useful for collision avoidance. Mooney75 – I don’t think you are familiar with certified TCAS1/TAS systems – example They are made by Garmin, L3, Avidyne and older ones by Honeywell, and are pretty common on newer IFR tourer aircraft. See various threads here on these systems; the search box finds them. Garmin and L3, and upgraded Avidyne can also display ADS-B emitters....