JW
Loved the graphic but afraid I don't agree.
There are two devices which ping out data, ADSB & a transponder.
Neither you, I or the Dr have ADSB, in or out, but we do have transponders.
To help the Dr locate our aircraft at Birdsville, if we can make our transponders ping out data then the good Dr's Zaon PCAS will certainly get him looking out the window very keenly.
Fitting ADSB out won't help save me from the Bonanza at Birdville until the Dr has ADSB in. ADSB in & out looks like being almost 25K and more than a few years away.
Device I am suggesting transmits milliwatts to your transponder - $200?
The fun part I believe is, if you have the right Mode S transponder, as now mandated in Europe then you effectively have ADSB out if you trigger it.
As I grasp it, why Airservices are setting up the Mode S radars (AMSTAR project)
is to request the info from these Mode S transponders giving them the flight path data without separate ADSB out being fitted to international aircraft.
TCAS works by triggering Mode S transponders for the flight path info in nearby aircraft.