Garmin GNC 420 - Manual (Page 176)

GNC 420(A) Pilot’s Guide and Reference 9-28
SECTION 9
AUX PAGES
2) Turn the large right knob to select the desired
menu option (Figure 9-71), and press the ENT
Key (Figure 9-72).
Figure 9-71 Nearest Airport Criteria Highlighted
Figure 9-72 Nearest Airport Criteria Page
The following menu options are available:
• ‘Display’ - Allows the pilot to adjust the display
for optimum viewing in any condition. Automatic
backlighting is available which uses a built-in
photocell (at the top left corner of the display
bezel) to make the proper display adjustments
without any user intervention. Automatic contrast
adjustment varies the screen contrast level based
upon current unit temperature. The pilot may
also select manual control of the display contrast
and backlighting of the GNC 420’s display.
• ‘Nearest Airport Criteria’ - Defines the minimum
runway length and surface type used when
determining the nine nearest airports to display
on the Nearest Airport Page. A minimum runway
length and/or surface type may be entered to
prevent airports with small runways, or runways
that are not of appropriate surface, from being
displayed. The default settings are ‘0 feet (or
meters)’ for runway length and ‘any’ for runway
surface type.
• ‘COM Configuration’ - Allows the pilot to select 8.33
kHz or 25.0 kHz COM frequency channel spacing.
NOTe: 8.33 kHz VHF communication frequency
channel spacing is not approved for use in the
United States.
• ‘Data Field Configuration’ - Allows the pilot to
select what type of data (bearing, course to steer,
distance, etc.) is displayed in the data field on the
left-hand side of the display. If the GNC 420 is
interfaced with a traffic information device (see
Section 11), thumbnail traffic can be configured
for display in the data field.
190-00140-20 Rev. K