Garmin G1000 PDAs & Smartphones User Manual


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Garmin G1000 Pilot’s Guide for Cessna Nav III
190-00498-07 Rev. A
78
FLIGHT INSTRUMENTS
SYSTEM
OVERVIEW
FLIGHT
INSTRUMENTS
EIS
AUDIO PANEL
& CNS
FLIGHT
MANAGEMENT
HAZARD
AVOIDANCE
AFCS
ADDITIONAL
FEATURES
APPENDICESINDEX
2.4 ABNORMAL OPERATIONS
ABNORMAL GPS CONDITIONS
TheannunciationslistedinTable2-3canappearontheHSIwhenabnormalGPSconditionsoccur.Referto
theFlightManagementSectionformoreinformationonDeadReckoningMode.
Annunciation Location Description
LOI
Lower left of
aircraft symbol
Loss of Integrity Monitoring–GPS integrity is insufficient for the current
phase of flight
INTEG OK
Lower left of
aircraft symbol
Integrity OK–GPS integrity has been restored to within normal limits
(annunciation displayed for 5 seconds)
DR
Upper right of
aircraft symbol
Dead Reckoning–System is using projected position rather than GPS position
to compute navigation data and sequence active flight plan waypoints
Table 2-3 Abnormal GPS Conditions Annunciated on HSI
Figure 2-40 Example HSI Annunciations
DeadReckoning(DR)ModecausesthefollowingitemsonthePFDtobeshowninyellowwhenGPSisthe
selectednavigationsourceduringEnroute(ENR)orOceanic(OCN)phasesofight:
•CDI(removedafter20minutes)
•CurrentTrackBug
•WindData
•DistancesintheBearingInformationWindows
•GPSbearingpointers
•GroundSpeed
It is important to note that estimated navigation data supplied by the G1000 in DR Mode may become
increasinglyunreliableandmustnotbeusedasasolemeansofnavigation.SeetheFlightManagementsection
for more information about DR mode
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