Garmin GNC 420W Pilots Guide - Page 176

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. 9-28 GNC 420(A) Pilot's Guide and Reference 190-00140-20 Rev. K