Pilot's Guide

22
Garmin GTS Traffic Systems
190-00587-02 Rev. B
What kind of transponder is required for use with the GTS
Traffic System?
All installations except the GTS 800 require the use of a compatible
Mode S transponder. The transponder provides an indication of how many other
TCAS-equipped aircraft are nearby, so that the GTS traffic system can adjust its
transmit power and reduce frequency congestion.
The GTS 800 does not require a transponder interface (regulatory
requirements for transponder usage still apply).
Is ADS-B Out required with the GTS Traffic System?
No. The ADS-B Passive Surveillance feature uses 1090ES ADS-B Out
broadcasts from other aircraft, but the ownship is not required to be equipped
with ADS-B Out.