Installation manual
6-5 General 
EXCEEDANCES | CAUTIONS YELLOW 
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Long Text 
Comments 
Caution Terrain* 
Caution Terrain 
The FLTA algorithm is 
predicting a likely ground 
collision within 
approximately 60 seconds 
– initiate a proper 
recovery maneuver. 
Caution Obstacle* 
Caution Obstacle 
The FLTA algorithm is 
predicting a likely obstacle 
collision with 
approximately 60 seconds 
– initiate a proper 
recovery maneuver. 
GPS Integrity Lost 
GPS Integrity Lost – Crosscheck 
Nav 
This is alerting about 
imminent exceedence of 
horizontal fault detection 
limits or protection levels. 
Crosscheck the nav 
solution and determine the 
best course of action but if 
on an approach, a Missed 
Approach is 
recommended. 
GPS Fault Dead 
Reckoning 
Position updated via dead 
reckoning 
The system will use the 
last known position and 
groundspeed (and 
heading if available) to 
estimate the aircraft 
position following loss of 
GPS for up to 5 minutes. 
Since Dead Reckoning 
assumes no directional or 
groundspeed change, it 
will not be reliable even 
during those first 5 
minutes if either or both of 
these factors have 
changed. 
GPS Fault No 
Position 
No position available 
The navigation solution 
cannot compute a 
position, typically after 
dead reckoning has 
expired. Transition to 
alternative navigation 
sources. 










