One of the most important thing to do is make sure your crank is tuned to run straight to optimise its action.I keep my speed from 1.5 to 2.0mph.The dive charts are useally set with a running speed of 2 mph.so you need to compensate if your going slower.keep baits above the fish.In the central basin i have marked fish coming up from 10-15 feet to hit a bait.just keep experimenting.Hope this helps,good luck.