Garmin GNC 420 Pilot's Manual & Reference page 40

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NAV PAGES
Map Page
The c key allows you to quickly declutter
the map display, providing four levels of map
detail. Note the "-1" and "-2" ("-3" is also
provided) suffix designations above, indicating
each successive declutter level.
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An autozoom feature is available which will automatically adjust from an en- route
scale of 2000 through each lower scale, stopping at a scale of 1.0 as you approach your
destination waypoint. The autozoom feature is turned on/off from the map setup page
described on page 36.
The map page also displays a background map showing lakes, rivers, coastlines, high-
ways, railways and towns. When a map scale is selected below the lower limit at which
the map detail was originally created, an "overzoom" indication will appear on the map
display, below the scale reading. "Overzoom" indicates that the detail at this scale may
not accurately represent actual conditions. If you continue to zoom in to lower scale set-
tings, "overzoom" will be replaced with "no map" and the geographic detail is removed
from the map display (but, the airport and navaid detail will remain).
The "Setup Map?" option (described on page 35) allows you to define the maximum
scale at which each map feature will appear. This provides you with complete control to
minimize screen clutter. You can also quickly remove items from the map using the
key.
To quickly declutter the map display, press the
needed) to select the desired amount of map detail.
The right-hand side of the map page includes four user-selectable data fields. By
default, the displayed data is: destination waypoint name (WPT), desired track (DTK),
distance to destination waypoint (DIS) and ground speed (GS). Any of these data fields
may be changed to display a different data type, as outlined on page 38. You may also
remove the four data fields from the map to show a larger map image, as described on
page 38.
c
key momentarily (as often as
c