Depth Lines (Advanced); Surface Clutter (Advanced) - Humminbird 917C Installation And Operation Manual

Depth Lines divide the display into four equal sections that are separated by
three horizontal depth lines. The depth of each line is displayed along the
depth scale. You can either turn Depth Lines On or Off. The Depth Lines
menu choice is available when User Mode is set to Advanced (see Setup
Menu Tab: User Mode).
Depth Lines
To change the Depth Lines setting:
1. Make sure you are in Advanced User Mode, then highlight Depth Lines
on the Sonar main menu.
2. Use the LEFT or RIGHT 4-WAY Cursor Control keys to turn the Depth
Lines setting On or Off. (Off, On, Default = On)
Depth Lines
(Advanced)
Surface Clutter adjusts the filter that removes surface clutter noise caused
by algae and aeration. The lower the setting, the less surface clutter will be
displayed. The Surface Clutter menu choice is available when User Mode is
set to Advanced (see Setup Menu Tab: User Mode).
Surface Clutter
To change the Surface Clutter setting:
1. Make sure you are in Advanced User Mode, then highlight Surface
Clutter on the Sonar main menu.
2. Use the LEFT or RIGHT 4-WAY Cursor Control keys to change the
Surface Clutter setting. (Low = 1 to High = 10, Default = 5)
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Surface Clutter
(Advanced)