I just get the average over three pings. It attempts to simulate water density, etc. so there will not be an exact distance reading. At least this is how it looks. I do not depend on the ping as much as my other tools. I view it as secondary.
Not sure what you mean by unchecked box for sonar.
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“You're painfully alive in a drugged and dying culture.”
― Richard Yates, Revolutionary Road
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