Garmin GDL 88 Pilot's Manual

Also see for GDL 88: Installation manual

Garmin GDL 88 Pilot's Manual Manual pdf 13 page image

2-3190-01122-03 Rev. C Garmin GDL 88 ADS-B Transceiver Pilot’s Guide2.1 ADS-B - Broadcast (ADS-B)ADS-B is the automatic broadcast of position reports by aircraft, surfacevehicles, and transmitters on fixed objects. These broadcasts contain much moredata than just a simple position report, they include: identity (Flight ID, CallSign, Tail Number, ICAO registration number, etc), ground track, ground speed,pressure altitude, indications of multitude capabilities, and emergency status. Thislist of data is non-inclusive of other data fields and bits used for various otherfunctions.Figure 2-3 ADS-B Operation - FAA IllustrationGarmin display units have the capability to show the status of the ground stationservices being received. Examples for the GTN and GNS products are shown below.See the display device Pilot Guide for the symbology used on that display.Unit Symbol DescriptionGNS Within coverage of a TIS-B ground station when connectedto a GDL 88.GNS Not within coverage of a TIS-B ground station whenconnected to a GDL 88.GNS GDL 88 does not have a valid track or heading and cannotplace ADS targets on the display.GTN Within coverage of a TIS-B ground station when connectedto a GDL 88.GTN Not within coverage of a TIS-B ground station whenconnected to a GDL 88Table 2-1 Map TIS-B Availability Symbols