A book called "Precision Trolling" is the best reasorce for this kind of information. It's in at least its 7th edition right now.
http://www.tidalfish.com/ref/article...ril2003/T1.jpg
http://www.luhrjensen.com/techreport...DepthChart.pdf
http://www.lakeeriesportfishing.com/dive_chart.html
These links have a little info to get you started.
Good luck
Steve



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