Garmin 90/140 Manuale Utente

G

ETTING

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TARTED

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U

NDERSTANDING

 D

UAL

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EAM

 T

RANSDUCER

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OVERAGE

wave information, and then sends the information to the 

Fishfinder. The Fishfinder displays the information on the 

screen for you to see and interpret. The type of transducer 

and settings you choose determine how the information is 

shown on the screen.

A dual beam transducer can transmit a narrow or a wide 

beam. The water area covered by the transmitted sound 

waves is determined by the beam width of the transducer 

and the water depth. The narrow beam provides crisp detail 

of what is under your boat, and is helpful if you are fishing 

in deeper water where the beam covers more area (for 

example, at a 30-foot depth, the narrow beam covers the 

area of about a 7-foot circle). 

The wide beam is more helpful in shallow water, because 

it gives you a much wider view of objects in the water, 

including areas beyond the sides of your boat. At a 30-foot 

depth, the wide beam covers the area of approximately a 

20-foot circle.