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5. When using a map loaded to a data card, you can view
detailed information about an individual map, highlight the
Map Name, and press ENTER. Highlight OK, and press
ENTER to exit the Map Information Page.
6. To select/deselect individual maps (data card maps only) to
be shown on the Map Page, highlight the box next to the map
you want, and press ENTER to check/uncheck the Show
box.
OR
Press MENU, select one of the options (Show All, Hide All,
or Show Defaults), and press ENTER.
7. Press QUIT to exit the Map Information Page.
Map Orientation
There are three map orientation options: North Up orients the map
like a paper map. Track Up orients the map in the direction of travel.
Course Up orients the map so the direction of navigation is always
up. When using Track Up or Course Up, the north arrow indicates
the orientation. To change the map orientation, press MENU to open
the Map Page. Press MENU again. Select Set Up Map, and press
ENTER.
Zooming In and Out of the Map
The map has 28 available map zoom ranges ranging from 20 ft to
800 nm (20 ft to 800 mi or 5 m to 1200 km). The map zoom range is
controlled by the IN and OUT keys, with the current range shown at
the bottom right of the data window.
NOTE: The range value represents the distance from one end of
the range bar ( ) to the other.
To select a map zoom range (zoom in and out):
Press the OUT key to zoom out; press the IN key to zoom in.
Both the GPSMAP 378 and GPSMAP 478 have a built-in worldwide
land database. The GPSMAP 378 contains detailed maps of the US
inland lakes and the GPSMAP 478 contains built-in BlueChart g2
charts. The GPSMAP 378/478 shows cartography as long as chart
information is available for the map zoom range you selected.
GPSMAP 378/478 Owner’s Manual 41
MArIne Mode PAges > MAP PAge
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