Unit Settings - Garmin GNC 250 Pilot’s Quick Reference Manual

The MSG key is used to view system messages and access
the GNC 250's unit settings. To view a message, press MSG.
To access the unit settings pages, press and hold the MSG key
Message Page
Press and hold MSG
for 2 seconds
CDI Settings
I/O Channel 2
Map Datum
Mag Var/Arrival Alarms
SUA Settings
for more than two seconds, and rotate the outer knob with
the cursor inactive.
Nearest Apt Search
Units of Measure
Battery Saver
Display Intensity
Trip Timer