Garmin 521s Benutzerhandbuch

Using Sonar

whiteline—highlights the strongest signal from the bottom to help 

identify its 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.
Surface Noise—show or hide the sonar returns near the surface of 

the water. Hide surface noise to help reduce clutter.
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.

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.

Range—adjust the range of the depth scale on the right side of the 

screen (auto, or to adjust manually, Right or Left).
gain—controls the sensitivity of the sonar receiver (auto, or to 

adjust manually, Right or Left). To see more detail, increase the 

gain. If the screen is cluttered, decrease the gain.
frequency—when using a dual frequency transducer, select how 

the frequencies appear on-screen (200kHz, 50kHz, dual,

or auto).