Garmin SOCATA TBM850, Pilot'S Manual

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Garmin G1000 Pilot’s Guide for the Socata TBM 850
190-00709-04 Rev. A 86
FLIGHT INSTRUMENTS
2.4 ABNORMAL OPERATIONS
ABNORMAL GPS CONDITIONS
The annunciations listed in Table 2-4 can appear on the HSI when abnormal GPS conditions occur (Figure
2-52). 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 five 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 2-4 Abnormal GPS Conditions Annunciated on HSI
Figure 2-51 Example of 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:
• CDI (removed after 20 minutes)
• Current Track Bug
• Wind Data (calculated based on GPS information)
• Distances in the Bearing Information windows
• GPS bearing pointers
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