If a flight plan contains a waypoint or procedure that does not correspond to a
waypoint or procedure in the navigation database in use, the waypoint or
procedure will become locked (depicted as “locked”) in the flight plan. Flight
plans with locked waypoints may be placed in the active flight plan portion of
the system but no active navigation will be provided. The locked
waypoint/procedure must be resolved by removing or replacing it with the
correct waypoint/procedures in the flight plan before the system will provide
active navigation.
• Airspace Depiction and Alerts
The GTN aides the flight crew in avoiding certain airspaces with Smart Airspace
and airspace alerts. Smart Airspace de-emphasizes depicted airspace that is not
near the aircraft’s current altitude. Airspace Alerts provide a message indication
to the flight crew when the aircraft’s current ground track will intercept an
airspace type that has been selected for alerting.
• Transponder Control
The GTN is interfaced to a Garmin GTX 335R transponder for control and display
of squawk code, mode, and additional transponder functions.
• Telephone Audio
Telephone audio distribution to the crew defaults to OFF on each power cycle of
the GTN. Prior to utilizing the telephone function the crew must distribute
telephone audio to the desired recipients. If the crew is utilizing the telephone
function it is required that the telephone audio be turned off upon completing
telephone usage.
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