Garmin G3X Pilot’s Guide190-01115-00 Rev. KAppendix E415SystemOverviewFlightInstruments EISCNSInterfaceGPSNavigationFlightPlanningHazardAvoidanceAdditionalFeatures AFCS Annun/Alerts Appendix IndexAPPENDIX E: GENERAL TIS-A INFORMATIONNOTE: Aircraft without an operational transponder are invisible to TIS-A.WARNING: Do not rely solely upon the display of traffic information for col-lision avoidance maneuvering. The traffic display does not provide collisionavoidance resolution advisories and does not, under any circumstances orconditions, relieve the pilot’s responsibility to see and avoid other aircraft.WARNING: Do not rely solely upon the display of traffic information toaccurately depict all of the traffic within range of the aircraft. Due to lackof equipment, poor signal reception, and/or inaccurate information fromaircraft or ground stations, traffic may be present that is not represented onthe display.The Traffic Information Service (TIS-A) provides traffic advisory information to non-TAS/TCAS-equipped aircraft. TIS-A is a ground-based service providing the relativelocations of all ATCRBS (Air Traffic Control Radar Beacon System) Mode-A and Mode-Ctransponder equipped aircraft within a specified service volume. The TIS-A groundsensor uses real-time track reports to generate traffic notification. The G3X displaysTIS-A traffic information on the Map Page. Surveillance data includes all transponder-equipped aircraft within the coverage volume. The G3X displays up to eight traffictargets within a 7.5-nm radius, from 3,000 feet below, to 3,500 feet above therequesting aircraft.TIS-A VS. TAS/TCASThe main difference between the Traffic Information System (TIS-A) and TrafficAdvisory (TAS) or Traffic Collision Avoidance Systems (TCAS) is the source of surveillancedata. TAS/TCAS uses an airborne interrogator with a half-second update rate, whileTIS-A utilizes the terminal Mode-S ground interrogator and accompanying data link toprovide a five-second update rate. TIS-A and TAS/TCAS have similar ranges.
