Garmin GDL 88 Pilot's Manual

Also see for GDL 88: Installation manual

Garmin GDL 88 Pilot's Manual Manual pdf 15 page image

2-5190-01122-03 Rev. C Garmin GDL 88 ADS-B Transceiver Pilot’s Guide2.3 Traffic Information Service - Broadcast (TIS-B)TIS-B provides the bridge between the current, radar based, ATC system andthe future ADS-B based system. When an ADS-B In or Out capable aircraft iswithin the service volume of an FAA ADS-B ground station, the ground stationwill begin to broadcast a portion of the ATC radar picture to the aircraft. Thisaircraft is then included in the list of aircraft that is being provided TIS-B serviceand is then considered a “TIS-B participant.”TIS-B coverage can be made available when the aircraft is within ground stationcoverage, in Secondary Surveillance Radar coverage, and the other aircraft has tobe in secondary surveillance radar coverage and transmitting altitude.ATC radar tracks for other aircraft within ±3,500 feet and 15 NM of theparticipant will be provided by the ground station, to include altitude, position,ground speed, and ground track. TIS-B data is broadcast once every three tothirteen seconds depending on the characteristics of the radar providing the datato the ground station.Figure 2-5 TIS-B Operation - FAA IllustrationNOTE: Even if the display is showing TIS-B traffic, unless the TIS-B participantindication is present (see Section 2.1) , TIS-B services are not being providedspecific to your aircraft and the traffic picture may not be complete.