
Garmin G2000 Cockpit Reference Guide for the Cessna Corvalis T240
190-01264-01 Rev. A
110
Abnormal Operation
Flight
InstrumentsEIS
Nav/Com/
XPDR/AudioAFCSFMS Nav
Flight
PlanningProcedures
Hazard
Avoidance
Additional
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Abnormal
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AlertsAppendixIndex
DR Mode is inherently less accurate than the standard GPS/SBAS Mode due to the
lack of satellite measurements needed to determine a position. Changes in wind speed
and/or wind direction compounds the relative inaccuracy of DR Mode. Because of this
degraded accuracy, the crew must maintain position awareness using other navigation
equipment until GPS-derived position data is restored.
CDI ‘DR’ Indication on PFD
FMS ‘DR’ Indication on PFD
Dead Reckoning Indications
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 G2000 is in DR Mode, the autopilot will couple to GPS for up to 20
minutes. Terrain Proximity, TERRAIN-SVT, and TAWS 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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