Garmin G1000 NXi Pilot’s Guide for the Cessna NAV III
190-02177-02 Rev. A
82
FLIGHT INSTRUMENTS
SY
STEM
O
VER
VIEW
FLIGHT
INSTRUMENTS
EIS
AUDIO P
ANEL
& CNS
FLIGHT
MANA
GEMENT
HAZARD
AV
OID
ANCE
AFCS
ADDITIONAL FEA
TURES
APPENDICES
INDEX
2.5 ABNORMAL OPERATIONS
ABNORMAL GPS CONDITIONS
The annunciations listed in the following table 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
GPS LOI
Right of HSI
Loss of Integrity Monitoring–GPS integrity is insufficient for the current
phase of flight
GPS INTEG OK
Right of HSI
Integrity OK–GPS integrity has been restored to within normal limits
(annunciation displayed for 5 seconds)
DR
Lower left 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 2-4 Abnormal GPS Conditions Annunciated on HSI
Figure 2-52 Example HSI Annunciations
In Dead Reckoning Mode the CDI is removed from the display when GPS is the selected navigation source.
Verify the following amber items when operating in Dead Reckoning Mode as they become increasingly
inaccurate over time.
• Current Track Indicator
• Wind Data
• Ground Speed
• Distances in the Bearing Information Windows
• GPS bearing pointers
• Desired track (DTK)
GARMIN SVT TROUBLESHOOTING
SVT is intended to be used with traditional attitude, heading, obstacle, terrain, and traffic inputs. SVT is
disabled when valid attitude or heading data is not available for the display. In case of invalid SVT data, the
PFD display reverts to the standard blue-over-brown attitude display.
