So I remember reading something that said you need your gps as close to the side scan transducer as possible. If not you could mark items out to the side of the boat and the coordinates would be off because the gps isn't directly on the transducer. Does anybody know more info about this? How far is it off? Are you having this issue with a console unit with internal gps?

Thanks for the help, I am looking into my first side scan unit and would like to know more about this topic.