Gps Alerts - Garmin GNC 355 Pilot's Manual

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GPS Alerts

The following alert conditions can affect GPS accuracy.
INDICATIONS
Yellow "LOI"
annunciation.
Unit invalidates
active course
guidance.
Annunciation is
specific to cause.
Yellow "No GPS
Position"
annunciation.
Ownship icon not
present
2-64
FAULT TYPE
Loss of Integrity
Loss of Navigation
Loss of Position
Pilot's Guide
CONDITION
Integrity of the GPS position does
not meet the requirements for the
current phase of flight. Occurs
before the final approach fix
(if an approach is active).
Aircraft is after the final approach
fix and GPS integrity does not meet
the active approach requirements.
Insufficient number of satellites
supporting aircraft position (i.e.,
more than 5 seconds pass without
adequate satellites to compute a
position).
GPS sensor detects an excessive
position error or failure that cannot
be excluded within the time to
alert.
On-board hardware failure.
Unit cannot determine a GPS
position solution.
190-02488-01 Rev. B