0

Out of 0 Ratings

Owner's of the Humminbird Marine GPS System GPS gave it a score of 0 out of 5. Here's how the scores stacked up:
  • Reliability

    0 out of 5
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How Sonar Works
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.