WhiteLine® highlights the strongest sonar returns in white, resulting in a distinctive outline. This has the benefit of clearly defining the bottom on the display.

Key Functions

Your 900 Series™ user interface consists of a set of easy-to-use keys that work with various on-screen views and menus to give you flexibility and control over your fishing experience. Your control head has the following keys:

POWER/LIGHT key

EXIT key

VIEW key

4-WAY Cursor Control key

MENU key

VIEW PRESET keys.

MARK key

GOTO key

INFO key

ZOOM (+/-) keys.

POWER/LIGHT Key

The POWER/LIGHT key is used to turn the 900 Series™ on and off, and also to adjust the backlight and background color of the display. Press the POWER/LIGHT key to turn the unit on. The Title screen is then displayed until the 900 Series™ begins sonar operation.

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Humminbird 917C, 957C manual Key Functions, POWER/LIGHT Key