White Line description
A white line can be added to your echogram to enhance the visual bottom detection. It appears as thick line in the current background colour (normally white) that follows the bottom contour. The white line can also be added to your ADCP views.
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How to open
To activate the white line, click in the echogram view to make it active.
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Select Echogram on the Active menu. On the left side of the Echogram dialog box, select Lines to open the page. Select White Line.
To activate the ADCP white line, click in the ADCP view to make it "active".
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•  Open the Active menu.
•  Select ADCP View Settings to open the dialog box.
•  On the left side of the ADCP View Settings dialog box, select Lines to open the page.
•  Under Bottom, select the visual enhancements you want to apply.
Description
The white line will not remove information, it will simply "push" the echo information further down in order to make the bottom easier to see. You can use the white and the bottom lines simultaneously.
This is a visual enhancement. The choice you make has no effect on the overall performance of the EK80 system.