190-01499-00 Rev. C
GTX 335/345 Pilot’s Guide
4-1
GTX 3X5 XPDR
1 – GTX 3X5 SERIES XPDR
4 - ADS-B IN TRAFFIC
4 ADS-B IN TRAFFIC (GTX 345 ONLY)
NOTE
Inherent inaccuracies exist in TIS-B and TAS/TCAS traffic position data. Because
of this the GTX 345 may at times be unable to correlate targets from multiple
sources for the same aircraft. When this occurs, a single aircraft is tracked and
displayed as two co-located targets.
NOTE
The GTX 345 will continue to receive ADS-B In information when in standby
mode.
The GTX has two modes:
1. Airborne Situational Awareness (AIRB). AIRB is in operation in the en route
environment, outside of five NM from, and 1,500 feet above, the nearest airport.
2. Surface Situation Awareness (SURF). SURF is in operation within the terminal
environment, within five NM and less than 1,500 feet above field elevation. When
SURF is running airport map data and ground targets may be displayed as an aid
to situational awareness.
The GTX 345 receives ADS-B traffic data (ADS-B, ADS-R, TIS-B) through the UAT
(978 MHz) and the 1090 MHz receivers. The GTX 345 may also receive traffic data from
configured TAS/TCAS/TCAD. Traffic data is received, processed, and outputted to a
connected display without pilot interaction. Traffic data may also be displayed on a PED
(e.g., tablet) via the built-in Bluetooth interface or connected Flight Stream 110/210.
ADS-B:
Data transmitted directly from other aircraft.
ADS-R:
Ground station rebroadcast of ADS-B data after data link translation (UAT to
1090 MHz or 1090 MHz to UAT). This function aids aircrafts only
operating one frequency.
For more information about ADS-B refer to the FAA Aeronautical
Information Manual (AIM), 4-5-7.
TIS-B:
Ground station broadcast of secondary surveillance radar (SSR) derived traffic.
