Garmin GNC 250 Pilot’s Quick Reference Manual page 22

CDI S — allows you to set the CDI scale to 0.3, 1.0 or 5.0 nm scale
ETTINGS
or an automatic scale. The default setting is 5.0 nm.
M V /A A — allows you to select between true, auto or user-defined
AG AR RVL LARM
magnetic variation options and set an arrival alarm for
waypoint arrival at a specified distance from a destination
waypoint. The default setting for magnetic variation is
'auto'.
N A S — allows you to define the runway length and surface type
EAREST PT EARCH
used in determining which nearest airports are displayed.
The default settings are '0 ft/mt' for length and 'any' for
runway surface.
B S — allows you to specify a timeout interval for the GNC 250
ATTERY AVER
display. The default setting is 30 seconds.
D I — allows you to manually adjust the brightness of the dis-
ISPLAY NTENSITY
play. The default setting is for automatic brightness.
T T — provides a running clock on Nav Menu 2 that may be set
RIP IMER
to run when power is on or when ground speed exceeds a
user-defined minimum.
U M — allows you to select units of measure for various naviga-
NITS OF EASURE
tion and planning displays.
S U A — allows you to turn specific controlled/restricted airspace
PECIAL SE IRSPACE
message alerts on or off. Turning message alerts off will
not prevent SUA information from being displayed on the
nearest SUA page.
M D — allows you to select or define the map datum used. The
AP ATUM
default datum is WGS
I/O C 2— allows you to select input and output interface settings
HANNEL
and baud rate for channel 2. The default settings are 'off'.
'84.