Garmin GPSMAP 421/421s Owner's Manual - Page 3
Introduction, Tips and Shortcuts, Manual Conventions, Quick Links
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Introduction This manual includes information for the following products: GPSMAP® 421/421s GPSMAP 521/521s GPSMAP 551/551s GPSMAP 451/451s GPSMAP 526/526s GPSMAP 556/556s Tips and Shortcuts • Press HOME from any screen to return to the Home screen. • Press MENU from any of the main screens to access advanced settings. • Press and release the Power key to adjust the display settings. Manual Conventions In this manual, when you are instructed to select an item, small arrows (>) appear in the text. They indicate that you should highlight a series of items on the screen using the Rocker, and press the SELECT key after each item. For example, if you see "select Charts > Navigation Chart," you should highlight Charts, and press SELECT. Then highlight Navigation Chart, and press SELECT again. Introduction Quick Links • Turning the Unit On or Off: page 2. • Acquiring GPS Satellite Signals: page 5. • Inserting and Removing SD Cards: page 6. • Restoring the Original Factory Settings: page 5. • Using the Navigation Chart: page 7. • Changing the Navigation Chart Settings: page 11. • Navigating to a Destination: page 23. • Creating and Using Waypoints: page 25. • Configuring System Settings: page 47. • Using Sonar: page 56. • Alarms and Messages: page 68. GPSMAP 400/500 Series Owner's Manual