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To turn on sonar and start the chart scrolling again, repeat the above step.
Sonar Menu with Stop Chart command selected. The box is unchecked,
indicating that the chart is scrolling across the screen.
Surface Clarity
The markings extending downward from the zero line on the chart are
called surface clutter. These markings are caused by wave action, boat
wakes, temperature inversion and more.
The surface clarity control reduces or eliminates surface clutter sig-
nals from the display. It does this by changing the sensitivity of the
receiver, decreasing it near the surface and gradually increasing it as
the depth increases.
There are three levels of surface clarity available: low, medium, or high.
It can also be turned off. The default level is off.
To adjust the Surface Clarity level:
1. From the Sonar Page, press
MENU|↓ to SONAR FEATURES|ENT|ENT.
Sonar Features menu with Surface Clarity selected (at left, dual-
frequency menu; at right, single-frequency menu).