Garmin APOLLO GX65 - Manual (Page 184)

Altitude Range Error
When the altitude encoder reports an altitude that is
out of range, the following message is created.
Altitude
Out of Range
Altitude Encoder Communications Failure
This message appears when communications fail
between the Apollo GX and the altitude encoder.
Altitude Encoder
Communications
Failure
Fuel/Air Data Sensor Communications Failure
This message appears when communications fail
between the Apollo GX and the fuel air data
computer.
Fuel / Air Data
Communications
Failure
Low Fuel
This message appears when the fuel air data
computer reports that remaining fuel is below the
user-selected threshold value.
Low Fuel Warning
Less Than 30 Min
Check Tanks
Arrival At Hold Altitude
You have arrived at the selected Hold Altitude.
Arrival At
2500ft Target
Hold Altitude
8-8
Message Function