John Doe: I have a Navionics Premium South Card. It is now about 4-5 years old. It has provided everything I needed or could want. I have found it very useful when going to new waters to see the contours and depth. Remember, a transducer mounted on the transom shows where you have been. As I have become more familiar with the waters I frequent most, I use the contours less now than before.
It is surprisingly accurate. With your fishfinder, you can set a depth offset for us that have to deal with rivers that have a summer and winter pool.


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