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Garmin G1000 Cockpit Reference Guide for the Mooney M20M & M20R
12-4
SECTION 12 – ANNUNCIATIONS
& ALERTS
System Annunciation Comment
Display is not receiving altitude input from the air data computer.
Display is not receiving vertical speed input from the air data computer.
Display is not receiving valid heading input from AHRS.
GPS information is either not present or is invalid for navigation use.
Note that AHRS utilizes GPS inputs during normal operation. AHRS operation
may be degraded if GPS signals are not present (see POH).
Display is not receiving valid transponder information.
Other Various Red X Indications
A red ‘X’ through any other display field, such as engine instrumentation
fields, indicates that the field is not receiving valid data.