The Garmin GTS lineup features three distinct system configurations, each tailored to a specific range of aircraft and cost/performance requirements. All three Garmin systems will operate to 55,000 feet – so they’re not constrained bythe much lower altitude limits imposed on some competitive TAS/TCAS systems.
GTS 800 TAS: A lower-cost option with performance suited to most light aircraft and helicopters2, the GTS 800 offers 40 watts of transmit power, a +/- 10,000-foot vertical separation maximum, and a typical active interrogation range of12 nm in the forward direction. Passive surveillance is provided with available 1090 MHz extended squitter ADS-B “In” capability. The basic GTS 800 system consists of a remote transmitter/receiver computer LRU and a singletop-mounted directional antenna. Flexibility is provided for optional dual directional antenna configurations, as well.
GTS 820 TAS: With 250 watts of nominal power output and up to 40 nm of active interrogation range in the forward direction, the GTS 820 is recommended for faster and higher-performing aircraft2. The 820 can actively track up to 60targets simultaneously, and depending on the specific cockpit display being used, will depict up to 30 of the most relevant traffic threats. Passive surveillance is provided with available 1090 MHz extended squitter ADS-B “In” capability.And the typical installation includes both top-mount directional and optional bottom-mount antennas (directional or omni) to reduce the potential for antenna “shading” of TAS interrogations. This shading effect can cause targets todrop out during turns or maneuvers, or when threat aircraft are positioned directly below you. In addition to the remote computer LRU, the GTS
820 package includes a 4-channel GPA 65 power amplifier/low noise amplifier (PA/LNA) that is remotely installed near the top directional antenna to boost antenna performance while minimizing power consumption for betterefficiency.
GTS 850 TCAS I: Featuring the same componentry, tracking range and 250-watt nominal power output of the GTS 820 TAS, the TCAS I certified GTS 850 is recommended for today’s higher-capability cabin class turboprops and businessjets2. For commuter aircraft (those with 10 to 30 passenger seats), TCAS I capability is mandated by the FAA. The Garmin GTS 850 system satisfies all TCAS I collision avoidance criteria, while enabling both active and passive (via ADS-B)surveillance of fast-closing aircraft in