Transducer Coverage

The area covered by the transmitted sound waves is determined by the cone angle of the transducer and the water depth. Using Garmin’s standard 20° transducer, the coverage is approximately 1/3rd of the water depth. As shown in Example 1, the coverage area at a 30 foot depth is approximately a 10 foot diameter circle. The scale below illustrates how coverage increases as depth increases.

Coverage

1'

Depth

Diameter

3'

2'6'

3'9'

4'12'

5'15'

6'18'

On the Water

Transducer Coverage

Coverage

4"

 

Depth

Diameter

3'

 

 

 

 

 

10"

6'

 

15"9'

20"12'

25"15'

30"

18'

35"21'

7'21'

8'24'

9'27'

40"

45"

45"

24'

27'

30'

10'30'

Example 1.

8° Transducer Coverage Chart

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