Introduction; Gdl 88(D) System Functions - Garmin GDL 88 Pilot's Manual

1

INTRODUCTION

The GDL 88 is a remotely mounted ADS-B transceiver. There are four models
of the GDL 88(D). Models with a single bottom mounted UAT antenna meet TSO
C154c Class A1S and are available with or without an internal GPS/SBAS receiver.
Models with one top mounted and one bottom mounted antenna meet TSO C154c
Class A1H and are also available with or without an internal GPS/SBAS receiver.
1.1

GDL 88(D) System Functions

The GDL 88 performs the following functions:
• UAT transmission (978 MHz)
The GDL 88 transmits ADS-B Out data on the 978 MHz (UAT) frequency
to be received by other aircraft, vehicles, and ATC for situational
awareness and traffic management.
• UAT reception (ADS-B, ADS-R, TIS-B, and FIS-B) on 978 MHz
The GDL 88 receives ADS-B data transmitted on the UAT link from
other aircraft, vehicles, and ground stations to present a traffic situational
awareness display for use by the flight crew. In addition, the GDL 88
receives FIS-B data on the UAT link to provide the flight crew with
graphical and textual weather products.
• Mode-S Extended Squitter reception on 1090 MHz
The GDL 88 receives ADS-B data transmitted by aircraft on the 1090 MHz
link to provided a comprehensive situational awareness traffic display for
use by the flight crew.
• Correlation of traffic reports from multiple traffic sources, including no
heading source installations
The GDL 88 is capable of interfacing with TCAD/TAS/TCAS I systems
to create and present a "fused" situational awareness display to the flight
crew.
• Output of ADS-B and TAS/TCAS I traffic data to an external display
The GDL 88 is capable of providing a situational awareness traffic display
on compatible displays.
• Output of FIS-B weather data to an external display
The GDL 88 is capable of providing various textual and graphical weather
190-01122-03 Rev. C
Garmin GDL 88 ADS-B Transceiver Pilot's Guide
1-1