Nav; Default Nav Page - Garmin GNC 420(A) Pilot's Manual & Reference

SECTION 3
NAV PAGES
3.2 NAV PAGE GROUP
The NAV Page Group includes seven pages (Figure
3-2). While viewing any NAV page, turn the small right
knob to select a different NAV page. The pilot may
find this selection process convenient to cycle between
the Default NAV Page and the Map Page, two of the
most frequently used pages. Other pages are provided
for terrain information, (if configured for TERRAIN) to
list frequencies for the flight plan, to show the current
position, to display current satellite reception, and to
make vertical navigation settings.
Map
Default NAV
NAV/COM
Position
VNAV
Figure 3-2 NAV Pages
NOTe: The NaV Page Group may have eight or
nine NaV pages available when the GNC 420
installation includes connection to traffic and/or
weather information sources. See Section 11 of
this manual for more information.
3-2

3.3 DEFAULT NAV PAGE

The first NAV page is the Default NAV Page (Figure
3-3). This page may be quickly selected from any page by
pressing and holding the CLR Key.
Active Leg of Flight Plan
TERRAIN
User-selectable
(if configured)
Satellite Status
The Default NAV Page displays a graphic course
deviation indicator (CDI) across the top of the page.
Unlike the angular limits used on a mechanical CDI
coupled to a VOR or ILS receiver, full scale limits for this
CDI are defined by a GPS-derived distance (0.3, 1.0 or 5.0
nm), as indicated at both ends of the CDI. By default, the
CDI scale automatically adjusts to the desired limits based
upon the current phase of flight: enroute, terminal area, or
approach. The pilot may also manually select the desired
scale setting as outlined in Section 9.4. The graphic CDI
shows the aircraft' s position at the center of the indicator,
relative to the desired course (the moving course deviation
needle). As with a traditional mechanical CDI, when off
course simply steer toward the needle. The TO/FROM
arrow in the center of the scale indicates whether the
aircraft is heading TO (up arrow) the waypoint or FROM
the waypoint (down arrow).
GNC 420(A) Pilot's Guide and Reference
Course Deviation
Indicator (CDI)
TO/FROM Flag
Number of Pages in
Data Fields Current Page Group
Current Page Group
Figure 3-3 Default NAV Page
Position of
Current Page
within Current
Page Group
190-00140-20 Rev. K