Yeah the current APRS catch is the HAM license. Wish somehow it was
easier to get a tracker for GA use. APRS tracking can be a great
safety factor.


Its not really that difficult, conceptually. Especially when they revise
the bandplan to the next narrowing of the bandwidth. Dedicate an
aviation channel or two nationwide (I'm sure the band planners can spare
ONE or TWO when the next doubling of available frequencies occurs)
packet reception. Digipeaters wouldn't really be needed, provided enough
igates exist on enough tall towers.

If enough aircraft in an area had this, it would also allow tracker
equipped aircraft to see OTHER tracker equipped aircraft as a sort of
poor man's TIS/TCAS, but the beaconing rate would need to be much faster
to support that in real time.

There is no monopoly on using APRS on HAM only, and you can put a TNC on
theoretically any radio, only infrastructure concerns.

Use smart beaconing, so that when traveling straight line, beaconing is
minimized, and use corner-pegging logic so that a beaconed datapoint
defines when a course change occurs. By setting up a system with smart
beaconing you could handle hundreds of beaconing aircraft in an area,
with minimal collisions.