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Appendix h transducer coverage – Garmin GPSMAP 168 Sounder User Manual

Page 115

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104

Appendix H

Transducer Coverage

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 1/3 of the
water depth. As shown is 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.

1'

10'

9'

8'

7'

6'

5'

4'

3'

2'

3'

6'

9'

12'

15'

18'

21'

24'

27'

30'

Example 1.

Coverage Diameter

Depth

4"

10"

15"

20"

25"

30"

35"

40"

45"

45"

3'

6'

9'

12'

15'

18'

21'

24'

27'

30'

8° Transducer Coverage Chart

Coverage
Diameter

Depth

168 Manual Part 2.indd 104

11/18/2002, 3:38:17 PM