
Cirrus Perspective
™
by Garmin – Cockpit Reference Guide for the SR20/SR22
190-00821-02 Rev. A
66
Abnormal Operation
Flight
InstrumentsEIS
Nav/Com/
XPDR/AudioAFCSGPS Nav
Flight
PlanningProcedures
Hazard
Avoidance
Additional
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Abnormal
Operation
Annun/
AlertsAppendixIndex
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:
• NavigationStatusBoxeldsexceptActiveLeg,TAS,andDTK
• CourseDeviationIndicator
• GPSBearingPointer
• WinddataandpointersintheWindDataBoxonthePFD
• TrackIndicator
• AllBearingPointerDistances
• ActiveFlightPlandistances,bearings,andETEvalues
Also, while the Perspective
™
system is in DR Mode, the autopilot will not couple to
GPS, and Terrain Proximity, TERRAIN-SVS, and TAWS are 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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