Join Date: Feb 2010
Location: Narragansett Bay
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Re: Kerl offset confusion
Your instincts are right, there is no way itís mounted 4.5 ft below the waterline.
Canít help with your programming, but what you describe doesnít make sense. As you know.
How certain are you of the actual depth? Did you lead line it or just reading a chart? Tides? Say itís really 6ft deep and your transducer is 2ft below the waterline (which still seems like too much). That would read 4ft, with zero offset. Another possibility is grass that is distorting the transducers feedback.
On a related point, I prefer to read actual water depth, not depth beneath the keel. That requires offsetting the installed draft of the transducer, not the additional draft of the keel. Water depth aligns better with charted depths, as Iím poking around the shallows and trying to confirm where I am.
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