Reading a sonar

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Sourdough
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Joined: Tue Oct 08, 2013 11:22 am
Location: Ottawa Ontario

Reading a sonar

Post by Sourdough »

Hi,
I am learning to read a sonar and thought I would see if more experience users would be willing to share some knowledge. For the past couple of weeks I have been going on the Rideau river out of Kars. My sonar is showing a lot of noise, but the water looks clear. It is quite different from when I was on Madawaska lake where all the returns werel well defined with almost no noise. Is there something about the Rideau water? Does algae do this? I have not been adjusting the sensitivity for different water bodies. Would that make this much of a difference? On Madawaska, no noise, on the Rideau the screen has dozens on one or two pixel returns.

The sonar is a Garmin echo 200.

Thank you
S.
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