2-44 Pilot’s Guide 190-02488-01 Rev. B
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ADS-B Key
FEATURE LIMITATIONS
• Functionality dependent upon GDL 88 configuration
Enabling Anonymous Mode
FEATURE LIMITATIONS
• Availability dependent on GDL 88 configuration
During anonymous mode, the unit replaces identifying information in the ADS-B Out
message with a temporary randomized number for privacy while providing position
information. Instead of a flight ID, the unit transmits the call sign "VFR."
Squawk Code
(as reported by GDL 88)
Transponder
Mode (ALT)
Active
Transponder
Depending on the configuration
of your GDL 88, tapping the
ADS-B key:
• Reports GDL 88 altitude
reporting status
OR
• Allows on/off control of the
GDL 88’s altitude reporting
function
“ALT” indicates that the unit is in altitude reporting mode.
This indication corresponds to the function status
annunciation on the control panel.
Control Panel
Annunciation
Tap ADS-B > Anonymous.
The key label changes from “Off” to “Armed.”
Tapping Anonymous again toggles the mode off.
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