Lowrance lms-522c igps 操作指南

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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 signals 

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 

|

↓ to 

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. 

     

2. Press 

↓ to 

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ENT. 

3. Press 

↓ or ↑ to select clarity level|

|

|

.