Garmin aera 796 Pilot's Manual

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Garmin aera 796 Pilot's Manual Manual pdf 143 page image

Garmin aera 795/796 Pilot’s Guide190-01194-00 Rev. C 127Hazard Avoidance Overview GPS Navigation Flight Planning Hazard Avoidance Additional Features Appendices IndexOut refers to the capability to transmit ADS-B information. ADS-B participating refersto the capability to both send and receive ADS-B information. Aircraft lacking eitherADS-In, ADS-B Out, or both ADS-B capabilities may also be referred to as ADS-B non-participating aircraft.Currently, rule-compliant ADS-B Out capability in the United States requires aTSO’ed SBAS-enabled GPS, such as a Garmin GPS 400W or similar, and one of twopossible data links: 1090 ES transponder or a 978 MHz UAT. Either data link systemis capable of transmitting the aircraft’s position, velocity, identification, and otherinformation every second to compatible aircraft and ground stations called GroundBased Transceivers (GBTs).Because 1090 ES transponders and UATs operate on different frequencies, aircraftnot similarly equipped cannot transmit/receive data link information directly to/fromeach other. Instead, operation within range of a GBT is required to receive data linkinformation on both frequencies. The GDL 39 is unique in its ADS-B In capability sinceit can receive data link information from both 1090 ES transponders and UATs.Thus, the GDL 39 receives traffic information directly from any ADS-B Out aircraftwithin range as well as the rebroadcast of ADS-B information from any nearby GBT.This rebroadcast is called Automatic Dependent Surveillance-Rebroadcast (ADS-R) andis automatically triggered by the detection of an ADS-B participating aircraft within theservice volume of the GBT. As a 978 MHz (UAT frequency) receiver, the GDL 39 canreceive both the Traffic Information Service-Broadcast (TIS-B) and Flight InformationService-Broadcast (FIS-B) provided in conjunction with ADS-R services when in rangeof a GBT.FIS-B service is provided continuously, but ADS-R including TIS-B will only bebroadcast by a GBT when an ADS-B participating aircraft is within the GBT’s definedservice volume. In this case, a GBT will only rebroadcast TIS-B information relativeto the ADS-B participating aircraft. Only traffic that is within 15 nm lateraland 3,500’ vertical of the ADS-B participating aircraft is provided in thebroadcast. Non-participating traffic aircraft located farther than 15 nm laterally and3,500’ vertically from the participating aircraft is are excluded from the informationtransmitted by the GBT.TIS-B traffic information includes non-participating aircraft detected by ATCsurveillance radar. As TIS-B data is derived from ATC surveillance radar data, TIS-Btraffic position updates typically occur every three to thirteen seconds. Therefore,