Garmin GPS 500 Pilot's Manual & Reference

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GPS 500 Pilot’s Guide and Reference12-12SECTION 12ADDITIONAL FEATURES12.2 GTS 8XX TRAFFIC SySTEMSIntroductionAll information in this section pertains to the display andcontrol of the Garmin GPS 500/GTS 8XX interface, refer tothe 400/500 Series Display Interfaces Pilot’s Guide Addendum(190-00140-10) when interfacing with non-Garmin productsWARNING: The GTS 8XX interface is intendedfor advisory use only to aid the pilot in visuallyacquiring traffic. No avoidance maneuversshould be based solely upon TAS or TCAS I trafficinformation. It is the responsibility of the pilot incommand to see and manuever to avoid traffic.NOTE: This section assumes the user hasexperience operating the GPS 500 and theGTS 8XX.NOTE: References to the GTS 8XX throughoutthis document refer equally to the GTS 800, GTS820, and GTS 850 unless otherwise noted.NOTE: TIS is disabled when a GTS 8XX unit isinstalled.Symbol Traffic Type DescriptionTrafficAdvisory (TA)A TA (Traffic Advisory) is generated when the GTS 8XX predicts that an intruder aircraft maypose a collision threat. A solid yellow circle represents an intruder aircraft that meets the TAcriteria as described in the TA Alerting Conditions section. A TA consists of the traffic symboland an aural alert (e.g., “traffic, 12 o’clock, high, 3 miles”).Out-of-Range TrafficAdvisoryThis solid yellow half circle appears (on the outer range ring) under the same conditions andhas the same urgency as a TA. Its appearance differs from the TA only to signify that theintruder is outside of the current range of the Traffic Page.ProximityAdvisory (PA)Proximity Advisories (PA) are displayed as solid white (may be configured as cyan) diamonds.PAs are defined as traffic within the 6.0-nm range, within ±1200 ft. of altitude separation, andare not a traffic advisory (TA).Other TrafficSymbolThe hollow white (may be configured as cyan) diamond represents traffic detected within theselected display range that does not meet the criteria for a TA or a PA and does not pose animmediate collision threat.Table 12-4 TAS/TCAS SymbologySystem DescriptionThe GPS 500 provides an optional display interface forthe GTS 8XX Traffic Advisory (TAS) and Traffic CollisionAvoidance (TCAS I) Systems. The GTS 800 and GTS820 are TAS systems, the GTS 850 is a TSO-CertifiedTCAS I system. The GTS 8XX uses active interrogations ofMode A/C/S (GTS 820 and GTS 850 only) and Mode A/Ctransponders to provide Traffic Advisories to the GPS 500.The GTS 8XX is an active traffic advisory system thatoperates as an aircraft-to-aircraft interrogation device. TheGTS 8XX monitors the airspace surrounding an aircraft,and advises the flight crew where to look for transponder-equipped aircraft that may pose a collision threat. Whenthe GTS 8XX receives replies to its interrrogations, itcomputes the responding aircraft’s range, bearing, relativealtitude, and closure rate. The GTS 8XX then determinesthe advisory status of the target and sends the locationinformation and alert status to the GPS 500 for display.The GTS 800 is capable of tracking up to 45 ModeA/C/S intruders. The GTS 820/850 is capable of trackingup to 45 Mode A/C plus 30 Mode S intruders. Up to 30of the most threatening targets are displayed.190-00181-60 Rev. G