What you go by when trolling is how many feet of line out......my thinking is this would be from the rod tip or there abouts. I use line counter reels and I just put my rod in the rod holder and drop my crankbait in the water and start measuring.. Here is a link to some Bandit depth charts that might help you. http://www.crappie.com/crappie/archi...pth-chart.html