Garmin aera 795/796 Pilot’s Guide 190-01194-00 Rev. C126Hazard AvoidanceOverviewGPS NavigationFlight PlanningHazard AvoidanceAdditional FeaturesAppendicesIndexDATA LINK TRAFFIC (GDL 39)The GDL 39 is a Bluetooth® enabled receive-only data link radio with on-boardGPS, 978 MHz (Universal Access Transceiver frequency band), and 1090 MHz ExtendedSquitter (1090 ES) receivers. It is designed to receive, process, and output traffic (ADS-Bair-to-air, and TIS-B traffic information), and weather (Flight Information Service-Broadcast (FIS-B)) information to the aera 795/796 through a power/data cable.ADS-B (Automatic Dependent Surveillance-Broadcast) is a surveillance technologydeployed across the United States as the cornerstone of the FAA’s Next Generation AirTransportation System (NextGen). ADS-B enables improved surveillance services, bothair-to-air and air-to-ground, especially in areas where radar is ineffective due to terrainor where it is impractical or cost prohibitive. Initial applications of air-to-air ADS-B arefor “advisory” use only, enhancing a pilot’s visual acquisition of other nearby ADS-Bequipped aircraft either when airborne or on the airport surface.18,000 FT10,000 FTGPSRADAR ATC1090 ESUATRADARCompositeADS-BGroundStationMode A/C1090 ES1090 ESUAT UATUATADS-B SystemFor the purpose of distinguishing between levels of ADS-B service, there are threeclassifications of aircraft or system capability; ADS-B In, ADS-B Out, and ADS-Bparticipating. ADS-B In refers to the capability to receive ADS-B information. ADS-B
