Abnormal Operations; Abnormal Gps Conditions - Garmin Socata TBM850 Pilot's Manual

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FLIGHT INSTRUMENTS

2.4 ABNORMAL OPERATIONS

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

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

Lower left of

Loss of Integrity Monitoring–GPS integrity is insufficient for the current

aircraft symbol

phase of flight

Lower left of

Integrity OK–GPS integrity has been restored to within normal limits

aircraft symbol

(annunciation displayed for five seconds)

Upper right of

Dead Reckoning–System is using projected position rather than GPS position

aircraft symbol

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

Garmin G1000 Pilot's Guide for the Socata TBM 850

190-00709-04 Rev. A

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