Garmin GNS 420AW Quick Reference Manual page 13

NAVCOM Page
The NAVCOM page provides a list of the airport com-
munication and navigation frequencies at your departure, en
route and arrival airports.
Frequency
Category
Usage
Restriction
Information
To Select a Frequency List for a Departure, En Route,
or Arrival Airport
1. Press the small right knob to activate the
cursor.
2. Turn the large right knob to place the cursor on
the airport identifier field (top line on the NAVCOM
page).
3. Turn the small right knob to select the desired
airport and press ENT.
To Scroll Through the List of Frequencies
1. Activate the cursor, if not already active, by pressing
the small right knob.
Turn the large right knob to move the cursor
2.
through the list of frequencies. If there are more
frequencies in the list than can be displayed on
the screen, a scroll bar along the right-hand side
Unlighted Obstacle
< 1000' AGL
NAVCOM PAGE / TERRAIN PAGE
Departure, En Route
or Arrival Airport
Assigned
Frequency
Scroll Bar
Lighted Obstacle
> 1000' AGL < 1000' AGL
Terrain Color Symbology
190-00356-01 Rev F
of the screen will indicate which part of the list is
currently being displayed.
Auto-Tuning a Frequency from the NAVCOM Page
1. Highlight the desired frequency by scrolling through
the list of frequencies, as described in the previous
procedure.
2. To place a frequency in the standby field of the COM
or VLOC window, highlight the desired frequency
and press the ENT key.
Terrain Page
To display the TERRAIN Page, select the NAV group and
turn the small right knob until the TERRAIN Page is displayed.
The page displays terrain information, aircraft ground track,
and GPS-derived MSL altitude. Altitude is shown in increments
of 20 feet or in increments of 10 meters, depending on unit
configuration. The "G" to the right of the MSL altitude display
reminds the pilot that the altitude is GPS-derived. For units
with installed in helicopters or equipped with optional HTAWS,
refer to 400W/500W Series Garmin Optional Displays, P/N
190-00356-30 Rev G, or later.
To inhibit TERRAIN:
1. Select the TERRAIN Page and press MENU. "Inhibit
Terrain?" is selected by default.
Press ENT. The TERRAIN system is inhibited. The
2.
annunciation is displayed in the terrain
annunciator field whenever terrain is inhibited.
Color
> 1000' AGL
Red
Yellow
TERRAIN/Obstacle
Location
Terrain/Obstacle above or
within 100 ft below current
aircraft altitude
Terrain/Obstacle between
100 ft and 1000 ft below the
aircraft altitude
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