I downloaded the PTD (Precision Trolling Data) app on my Iphone. You have to purchase each type of lure chart separately. Usually $1.99 or so for each lure.
Then I can dial in the type of crank and the depth I want it to run. The app will tell you how much line to have out. For instance, if I have Bandit 300's on some rods and want them to run 10 feet deep, the app shows I need 38 feet of line out running 10# mono. There is a different chart for braid. If I have Flicker Shad 7's on different rods, I'd need 61 feet of line out to get 10 feet down. On my boards, If running two out each side, I'll stagger them 20 feet apart (ie. 4o feet and 20 feet.) If running three boards on each side, I'll put them at 60, 40 and 20. That gives me 128 feet of coverage including the boat. Like RouteU said, when you catch a fish on an outside board, rotated the other inside board to the outside and so on. I also run long lines out the back on different rods.
Attachment 305790Attachment 305791