
Garmin G1000 Cockpit Reference Guide for the Piper PA-28-181 Archer
190-01460-00 Rev. A
64
Abnormal Operation
Flight
InstrumentsEIS
Nav/Com/
XPDR/AudioGPS Nav
Flight
PlanningProcedures
Hazard
Avoidance
Additional
Features
Abnormal
OperationAnnun/AlertsAppendixIndex
As a result of operating in DR Mode, all GPS-derived data is computed based upon
an estimated position and is displayed as yellow text on the display to denote degraded
navigation source information. This data includes the following:
• Navigation Status Box fields except Active Leg, TAS, and DTK
• GPS Bearing Pointer
• Wind data and pointers in the Wind Data Box on the PFD
• Current Track Indicator
• All Bearing Pointer Distances
• Active Flight Plan distances, bearings, and ETE values
Also, while the G1000 is in DR Mode, the autopilot will couple to GPS for up
to 20 minutes. Terrain Proximity, TERRAIN-SVS, and TAWS-B are also disabled.
Additionally, the accuracy of all nearest information (airports, airspaces, and
waypoints) is questionable. Finally, airspace alerts continue to function, but with
degraded accuracy.
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