Vertical Navigation Page - Garmin GNC 420(A) Pilot's Manual & Reference

3.9 VERTICAL NAVIGATION PAGE

The GNC 420' s Vertical Navigation Page (the last
NAV page, see Figure 3-49) allows the pilot to create a
three-dimensional profile which guides the pilot from the
present position and altitude to a final (target) altitude at
a specified location. This is helpful when the pilot would
like to descend to a certain altitude near an airport or
climbing to an altitude before reaching a route or direct-
to waypoint (Figure 3-50). Once the profile is defined,
message alerts and additional data on the Default NAV
Page and the Map Page provide guidance to the pilot.
1 2
5
Figure 3-49 VNAV (Vertical Navigation) Page
Target Altitude
1
Target Distance
2
Altitude Reference (AGL or MSL)
3
Target Reference
4
Vertical Speed Desired
5
Vertical Speed Required
6
Current Page Group
7
Number of Pages in Current Page Group
8
Position of Current Page within Current
9
Page Group
190-00140-20 Rev. K
3
4
6 7 8 9
GNC 420(A) Pilot's Guide and Reference
NOTe: To use the vertical navigation features,
ground speed must be greater than 35 knots
and the pilot must be navigating to a direct-to
destination or using a flight plan.
TIME AND DISTANCE
TO PROFILE
CURRENT ALTITUDE
AND POSITION
DISTANCE TO TARGET
Figure 3-50 Vertical Navigation Profile
Creating a vertical navigation profile
(Figure 3-50):
1) Press the small right knob to activate the
cursor.
Turn the large right knob to highlight the
2)
target altitude field.
Turn the small and large right knobs to select
3)
the target altitude (Figure 3-51) and press the
ENT Key.
Figure 3-51 Target Altitude Field Selected
SECTION 3
NAV PAGES
TARGET ALTITUDE
AND POSITION
AIRPORT
3-25