Garmin 4008 Manuale Proprietario

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To adjust advanced sonar settings, press 

 while viewing a sonar screen.

Range—the range of the depth scale on the right side of the screen (

 or 

.

Gain—controls the sensitivity of the sonar receiver (

 or 

). 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 

(

, 

, 

or 

).

Zoom—zoom in to a section of the Full Screen. The zoom is off, or set to No Zoom,by default. Four 

options are available:

2x Zoom—twice the magnification.
4x Zoom—four times the magnification.
bottom lock—locks the zoom window to the bottom. 
Split Zoom—opens the Split Zoom screen.

Depth line—quickly reference a specific depth (

 or 

).

A-Scope (dual frequency only)—a vertical flasher along the right side of the screen (

 or 

).

Sonar Setup—opens the Sonar Setup screen. See