Garmin 521s 用户指南

Using Sonar

data bars—show or hide battery voltage, water temperature, water 

speed (if your transducer is capable), cruising, and navigation.

  NOTE: To display water temperature or water speed, the connected 

transducer must be capable of measuring water temperature, water 

speed, or both. Select 

 to display the values.

appearance—customize the display of fish symbols, whiteline, and 

the sonar color scheme.

fish Symbols—set how the sonar interprets suspended targets.

The unit does not interpret the sonar return data (default). 

 

Suspended targets appear as symbols. Background sonar 

information appears, making the distinction between fish 

and structure easier.
Suspended targets appear as symbols with background 

information shown. The target depth of each symbol is also 

displayed.
Suspended targets appear as symbols. No background 

information appears. 

 

Suspended targets appear as symbols with no background 

information shown. The target depth of each symbol is 

displayed.

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whiteline—highlights the strongest signal from the bottom to 

help identify the hardness or softness. 

Off (default)—turns off whiteline.
High—the most sensitive setting. Almost all strong returns 

are highlighted in white.
Medium—many strong returns are highlighted in white.
Low—the least sensitive setting. Only the strongest returns 

are highlighted in white.

Color Scheme—select 

 or 

. This affects the background 

on all sonar screens, but does not change the Temp Log screen.

To adjust advanced sonar settings, press 

 while viewing a 

sonar screen.
Pause Sonar—Stops the scrolling of the sonar screen.

1.  While viewing a sonar screen, press 

 > 

.

2.  Use the 

 to position the pointer over the fish or structure 

you want to mark.

3.  Press 

.

  From the paused screen, press 

 > 

 to continue 

scrolling.

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