Pilot's Operating Handbook
Supplement 75
GDR66 CPDLC and COM3 VHF
communications
Edition 0 - March 15, 2021
Rev. 1
Page 9.75.7
VHF COM3 communications
● NOTE ●
COM1 a
nd COM2 remain the primary means of communications.
●
The pilot can operate COM3 communications through the GTC.It will be available as
GDR audio channel.
Refer to the Garmin Pilot's Guide for further information.
System protection
The GDR66 transceiver is electrically supplied by the BUS1 bar and is protected by
the VDL breaker - see figures 9.75.1 and 9.75.2.
Figure 9.75.1 - Partial electrical distribution of BUS bars
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