Understanding Transducer Coverage - Garmin Fishfinder 140 Owner's Manual

G S
ETTING TARTED
1'
10'
Tree
20'
Aerial View of the Water

Understanding Transducer Coverage

The bottom area covered by the transmitted sound waves
is determined by the beam width of the transducer and the
water depth. The Fishfinder can transmit either a narrow or
wide beam.
The narrow beam provides crisp bottom and structure
detail, but the coverage area is limited. As shown in the
following illustration, at a 30-foot depth, the narrow beam
covers the area of a 6-foot circle.
2
Fish
Tree
Sonar Display
The wide beam covers a much larger area, but with some
loss of bottom and structure detail. In the following
illustration, at a 30-foot depth, the wide beam covers the
area of a 20-foot circle.
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Wide Beam
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Narrow Beam
Fishfinder 90/140 Owner's Manual