Garmin 240 - Manual (Page 37)

29
On the Water
29
On the Water
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 1/3rd of the water depth.
As shown in Example 1, the coverage area at a 30 foot depth is approxi-
mately 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
4"
10"
15"
20"
25"
30"
35"
40"
45"
45"
3'
6'
9'
12'
15'
18'
21'
24'
27'
30'
8° Transducer Coverage Chart
Depth Coverage
Diameter Depth
190-00155-10 Rev A.indd 08/16/00, 2:47 PM 29