Steve S wrote:


The KT 73 is fully field-upgradeable (software only) to include
air-to-ground Automatic Dependent Surveillance Broadcast (ADS-B) operation.
This transponder function enables aircraft to transmit position, altitude
and vector information derived from the onboard GPS system for use by ATC
facilites.

https://www3.bendixking.com/static/c...ls.jsp?pid=136

Makes it a little confusing doesn't it?


Your transponder would allow ATC and everyone else to know you are
there. But no transponder is needed to see other traffic. You could
have the device in your car and see the airplane traffic around you.