Dave schreef:
We have the ZAON XRX on board our Cherokee in a VERY busy environment
(100,000 operations /yr)
I cannot begin to tell you how useful this tool is in tracking
trafffic around us
For $1500 !

But it will only show planes with certain non-mandatory equipment, if I
got it right? Is it not like radio at a non-controlled aerodrome, a nice
extra source of info but nothing to really count on?