Humminbird 596C HD DI - Manual (Page 69)

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Sonar Menu Tab
Press the MENU key twice to access the Main
Menu and then press the RIGHT Cursor key until
the Sonar tab is selected.
NOTE: Menu options can be expanded or simplified
by setting the User Mode to Advanced or Normal. See
Main Menu: User Mode for details.
Sonar Menu
Advanced
Shown with optional
Down Imaging™ menus
Sonar Menu Tab