Sounds to me like your unit will have to be sent back to fix that problem, or live with it. It should not retain that data, especially after a power down and back on and its still there, the map that is. Sorry bud. ps.....Im no authority on it however, but I have owned that depth finder and 2 hds units since.Never had that issue with my lms522c.


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Thanks for all your advice guys.
















