Single Beam Sonar (550, 560) - Humminbird 561 Operation Manual

500 series
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Single Beam Sonar
(550, 560)
The 550 Fishfinder and 560 Fishfinder use a
200 kHz single beam sonar system with a 20°
area of coverage. Depth capability is affected by
such factors as boat speed, wave action, bottom
hardness, water conditions, and transducer
installation.
4
How Sonar Works

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