My kids bought me a Lowrance SI 7 but still havn't used it much as when they set it up it drained my starting battery and didn't use it this whole season. Ketchning so many off certain docks that havn't taken the time to learn it. But THAT is my NY's resolution to figure it out simply for the sport of hunting up crappie schools out in lake. LSL angler has same unit and we see fish under docks enough on his boat.