Pilot's Guide

4
Garmin GTS Traffic Systems
190-00587-02 Rev. B
Passive Surveillance
GTS Traffic Systems can optionally utilize passive surveillance information
from an internal ADS-B receiver. The ADS-B receiver uses 1090ES broadcasts
from other aircraft that are equipped with 1090ES ADS-B Out. These broadcasts
are combined with the active surveillance data to enhance the accuracy of target
positions on the display. This is Garmin’s CLEAR CAS
TM
technology, which
correlates ADS-B and actively interrogated targets to provide pilots with the most
accurate target position. A GPS position source and magnetic heading system are
required for passive surveillance functionality.
System Specifications
The specifications for each member of the GTS Traffic Systems family are
contained in the table below.
Product GTS 800 GTS 820 GTS 825 GTS 850 GTS 855
Type TAS
TSO-C147
(Class A)
TAS
TSO-C147
(Class A)
TAS
TSO-C147
(Class A)
TCAS I
TSO-C118
TCAS I
TSO-C118
ADS-B
Capability
TSO-C166b
[Note 1]
TSO-C166b
[Note 1]
TSO-C166b
[Note 1]
TSO-C166b
[Note 1]
TSO-C166b
[Note 1]
Transmit Power 40 Watts 250 Watts 400 Watts 250 Watts 400 Watts
Maximum Range 22 NM 40 NM 40 NM 40 NM 80 NM
# Targets Tracked 45 75 75 75 75
XPDR Interface Required
None
Mode S
[Note 2]
Mode S
[Note 2]
Mode S
[Note 2]
Mode S
[Note 2]
External Amplifier Required No Yes No Yes No
Table 2 GTS Traffic Systems Specifications
Note 1: Class A1 / Type 1 (Class A1S for single-antenna installations). GTS 800/820/850
require system software version 3.00 or later for TSO-C166b compliance.
Note 2: A compatible Garmin transponder capable of identifying TCAS interrogations
is required.