Garmin gpsmap 400 Manuale Utente

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SInG

 S

onar

When connected to a transducer, your unit becomes a powerful 

fishfinder/flasher. If your unit does not have a built-in sounder, you

can connect a Garmin GSD 21 or GSD 22 sounder module to your 

unit to use the sonar features.

Select the Full Screen option to view a full-screen graph of the 

transducer’s sonar readings. 
From the Home screen, select 

 > 

.

The Flasher screen (dual beam transducer only) provides an almost 

instantaneous return of what is below your boat. The depth scale is 

organized as a ring that starts at the top, or 12:00, and progresses 

clockwise. Sonar information flashes on the ring when it is received

at the depth indicated on the inside ring. Like the regular graph, the 

colors indicate different strengths of the sonar return.
To open the flasher, from the Home screen, select

 > 

.