A buddy of mine gave me a Lowrance X22A a few winters ago. I'd like try it out for ice fishing, but havent a clue as to how it works, how to hook it up, what battery do I need etc. Can this unit be used for ice fishing? Does anybody have this unit or had it in the past? Any assistance or guidance would be immensley appreciated. PS... I've looked for the book: Electronics Fish Finders for Dummies, but havent seen it on the shelves.