Garmin gnc 420 User Guide
GNC 420/420A Pilot’s Guide and Reference
1-2
SECTION 1
INTRODUCTION
1.2 KEY AND KNOB FUNCTIONS
The GNC 420 is designed to make operation as simple
as possible. The key and knob descriptions (Figure
1-1) provide a general overview of the primary function(s)
for each key and knob. The takeoff tour (Section 1.3)
is intended to provide a brief overview of the primary
functions of the GNC 420.
1-1) provide a general overview of the primary function(s)
for each key and knob. The takeoff tour (Section 1.3)
is intended to provide a brief overview of the primary
functions of the GNC 420.
Large left knob
Large right knob
Small left knob
Small right knob
NRST
OBS
OBS
MSG (message)
FPL (flight plan)
PROC (procedures)
FPL (flight plan)
PROC (procedures)
COM Power/ Volume
COM Flip-flop
CLR (clear)
COM Flip-flop
CLR (clear)
ENT (enter)
MENU
RNG (map range)
Direct-to
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
GNC 420
4
3
2
5
6
8
9
7
1
10
11
12
13
14
15
16
Figure 1-1 Keys and Knobs
Experiment with the unit and refer to the reference
sections for more information.
Data is entered using the large and small knobs.
Experiment with them to become efficient at entering data.
This greatly reduces the amount of time spent operating
the GNC 420 in flight.
This greatly reduces the amount of time spent operating
the GNC 420 in flight.