Garmin GPSMAP 190-00683-00 - Manual (Page 21)

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This section explains some of the more common operations you will perform with your GPSMAP 378/478.
To switch usage modes:
1. Press and hold the PAGE/MODE key. The Usage Mode Menu appears.
2. Use the ROCKER to select either Automotive or Marine, and press ENTER.
Marine Mode Pages
Marine Mode has five main pages: Map, Compass, Highway, Active Route, and Position Data. An optional XM Audio Page can be enabled.
An optional Sonar Page is available when a GSD 21 is connected. See the “ Setting Up and Using Sonar ” section beginning on page 103 for
more information.
Map Page Compass Page Highway Page
Position Data Page Active Route Page XM Audio Page
(Optional)
GPSMAP 378/478 Owner’s Manual 13
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