Originally Posted by sds888 Thanks. Is there a chart for how fast you are going compared to the chart speed number? Or is it just something you learn? Sent from my iPad using Crappie.com Fishing mobile app Think of the chart speed numbers as mph. If you are going 3 mph, set chart speed on 3. If your at the bow barely moving, chart speed at 1-2 will give better down images and side images.
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