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in this video all of the units are showing coarse readings. the humminbird is reading coarse with the donut .the others with the triangle.if you will look they are all pionting in different dirrections because of the boat going so slow.if he were to speed the boat up thin they all will piont in the same direction . slow back down the same thing will happen.all im asking is look at the video and see. find the best gps expert you can and ask.gps in this range cannot do what you are asking.yes it is possible but not with the tecnology that were using.$$$$$$$$$$$$$Originally Posted by rnvinc
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