Advertisement
The following alert conditions can affect GPS accuracy.
annunciation.
Unit invalidates active
course guidance.
Annunciation is
specific to cause.
annunciation.
Ownship icon not
present
For information about managing limited navigation features, read
Dead Reckoning in section 3.
Loss of Integrity
Loss of Navigation
Loss of Position
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.
Advertisement
