Hello Lee,

You don't mention the model of the sounder but if it the S200DL it
does not have a keel offset. The only readings you will see are from
below the face of the transducer. If you have a different model
sounder please email me and I will be happy to let you know if there
is an adjustment or not.

Steve
DMI Marine, Inc.



Steve,

I thought that Datamarine was no longer in business. Perhaps you
could answer my question. I have a Datamarine depth sounder but
cannot figure out any way to adjust the reading to give me an accurate
depth since the transducer is a few feet below the waterline. I have
a manual for a slightly more modern Datamarine depth sounder on
another boat, but it also does not have any instructions on how to
compensate for the location of the sounder. Any help would be
appreciated.

Lee Huddleston
s/v Truelove