Garmin GNC 420 - Manual (Page 21)

GNC 420(A) Pilot’s Guide and Reference 1-13
SECTION 1
INTRODUCTION
190-00140-20 Rev. K
NAV/COM Page
From the Default NAV Page, turn the small right knob
until the NAV/COM Page (Figure 1-21) is displayed.
Frequency Type
Departure, Enroute, or
Arrival Airport
Frequency List
Figure 1-21 NAV/COM Page
The NAV/COM Page displays the available frequencies
(communications and navigation) for the departure airport,
any enroute airports which are included in the flight plan,
and the final destination airport. When using the direct-
to function, frequencies are listed for the airport nearest to
the starting position and the destination airport.
Displaying the frequency list for the
desired flight plan or direct-to airport:
1) Press the small right knob to activate the
cursor on the airport identifier field (in the GPS
Window).
2) Turn the small right knob to display the list
of airports (departure, arrival, and enroute) for
the flight plan or direct-to. Continue to turn
the small right knob until the desired airport
is selected.
3) Press the ENT Key to display the frequency list
for the selected airport.
A frequency listed on the NAV/COM Page can be
quickly transferred to the standby field of the COM
Window (NAV frequencies are shown for reference only).
This time-saving process prevents having to ‘re-key’ a
frequency already displayed elsewhere on the screen.
Selecting a communication frequency:
1) Press the small right knob to activate the
cursor in the GPS Window.
2) Turn the large right knob to select the desired
frequency from the list.
3) Press the ENT Key to transfer the selected
frequency to the standby field in the COM
Window. COM frequencies automatically go
to the standby field of the COM Window.
4) To activate the selected frequency, press the
COM Flip-flop Key.
Displaying frequencies for a different
airport along the flight plan.
1) Press the small right knob to highlight the
airport identifier field.
2) Turn the small right knob to display the list of
airports within the flight plan (Figure 1-22).
Figure 1-22 Airport Window
3) Continue turning the small right knob to select
the desired airport and press the ENT Key.