Section 1 System Description; Section 2 General Theory Of Operation; Active Surveillance - Garmin GTS 820 TAS Pilot's Manual

SECTION 1 SYSTEM DESCRIPTION

Garmin GTS Traffic Systems are a family of Traffic Advisory Systems (TAS)
and Traffic Alert and Collision Avoidance Systems (TCAS). The systems feature
both active interrogation of aircraft transponders and reception of 1090 MHz
Extended Squitter ADS-B broadcasts (ADS-B IN).
GTS Traffic Systems include the following products:
• GTS 800 TAS
• GTS 820 TAS and GTS 850 TCAS I
• GTS 825 TAS and GTS 855 TCAS I
• GTS 8000 TCAS II
Terms used in this Pilot' s Guide:
• TAS: Refers to any TAS system (GTS 800/820/825)
• TCAS I: Refers to any TCAS I system (GTS 850/855)
• TAS / TCAS I: Refers to any TAS or TCAS I system
(GTS 800/820/825/850/855)
• TCAS II: Refers to the GTS 8000
NOTE: Details on the GTS 8000 TCAS II operation are not included in this
guide. For information on a GTS 8000 TCAS II system, refer to the aircraft-
specific installation documentation.

SECTION 2 GENERAL THEORY OF OPERATION

2.1 Active Surveillance

GTS Traffic Systems actively interrogate the transponders of other nearby
aircraft to determine their bearing, distance, altitude and vertical trend relative
to your aircraft. Aircraft with operating transponders are detected, and aircraft
with altitude reporting transponders will also include altitude and vertical trend
information (level, climbing, or descending). This information is then shown on
a compatible traffic display.
GTS Traffic Systems also provide visual and aural alerts to assist in visually
acquiring traffic. Aural and visual alerts are provided as a Traffic Advisory (TA)
for conflicting traffic.
190-00587-02 Rev. E Garmin GTS Traffic Systems
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