Garmin GTS 825 Pilots Guide - Page 6

Product Description The GTS 8XX Series Traffic Advisory System (TAS) and Traffic Collision Avoidance System (TCAS I) uses active interrogations of Mode A/C/S transponders to provide Traffic Advisories to the pilot independent of the air traffic control system. The system also uses passive surveillance by means of an Automatic Dependent Surveillance - Broadcast (ADS-B) receiver which is enabled when installed with an ADS-B link transmit class of equipment. Figure 1 GTS 8XX LRU The GTS 8XX Series of Traffic Advisory System (TAS) or Traffic Alert and Collision Avoidance System (TCAS I) microprocessor-based sub-systems products consist of the GTS 800, GTS 820 and GTS 850. The GTS 800 TAS product consists of one LRU which has low power (40 Watts) transmit capability, and one GA 58, or other Garmin-approved, directional antenna. The GTS 820 TAS and GTS 850 TCAS I products include one LRU paired with one GPA 65 PA/LNA Amplifier Module, which allows high power (250W) transmit capability, and one GA 58 or other Garmin-approved directional antenna. An optional second antenna may also be installed with these systems. The optional second bottom mounted antenna may be omnidirectional or a Garmin approved directional antenna. For targets equipped with a 1090 MHz ADS-B transmit class of equipment, the GTS 8XX series combines active (interrogated) and passive (ADS-B) surveillance data to enhance the accuracy of target position on the display. The systems use Garmin's CLEAR CASTM technology to correlate ADS-B and actively interrogated targets to provide pilots with the most accurate target position. Passive ADS-B surveillance is enabled when the GTS 8XX is installed with an ADS-B transmit class of equipment. 2 Garmin GTS 8XX Series Traffic Advisory System 190-00587-02 Rev. A