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Old 10-01-2011, 06:00 AM
Senior Member
Join Date: Dec 2006
Location: Atlanta, GA
Posts: 142

I had the same problem and discovered that my transducer had just come unlocked in the bracket so that it was swiveling up while underway. When I was idling, I could mark bottom no problem but, at speed, it would mark incorrect depths due to the fact that the transducer was tilting up and firing the beam out behind the boat.

It's an easy thing to check.

rickmacc is offline