Dualbeam sonar – Humminbird 560 User Manual
Page 12
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DualBeam Sonar
The 570 Fishfinder uses a 200/83 kHz DualBeam
sonar system with a wide (60°) area of
coverage. DualBeam sonar is optimized to show
the greatest bottom definition using a narrow
(20°) beam yet can still indicate fish found in
the wide (60°) beam when the Fish ID+™
feature is turned on. DualBeam is ideal for a
wide range of conditions - from shallow to very
deep water in both fresh and salt water. Depth
capability is affected by such factors as boat
speed, wave action, bottom hardness, water
conditions, and transducer installation.
How Sonar Works
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