I still think the paint is the problem. I know of nothing else that would
keep it from working in shallow water and work in deeper water. If the unit
or transducer were not putting out enough power - it would be the opposite.

--
Tony
my boats at http://t.thomas.home.mchsi.com

"Fred Reyes" wrote in message
om...
When is doesn't work, It will flash the digital depth reading, it will
either flash the last known reading or flash "zero" if I haven't moved
in to deep enough water to get any reading yet.



"

Check the settings. There is a surface clutter suppression, or
something like that, that might be causing the problem. What does it do
when it "doesn't work"?