Cockpit Reference Guide

Garmin G1000

Cockpit Reference Guide for the Cessna CitationJet Model 525

190-01130-00 Rev. A

Abnormal Operation

Flight

InstrumentsEIS

Nav/Com/

XPDR/AudioAFCSGPS Nav

Flight

PlanningProcedures

Hazard

Avoidance

Additional

Features

Abnormal

Operation

Annun/

AlertsAppendixIndex

DR Mode is inherently less accurate than the standard GPS/WAAS 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.

Dead Reckoning Indications

Symbolic Aircraft

(Map pages and Inset Map)

CDI ‘DR’ Indication on PFD

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elds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. TAWS is 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.