is to set up a complete second station up front with a trolling motor transducer on the trolling motor. There are a lot of folks that do this & in this way if they get another unit they just get one that takes the same mount & transducer they already have so when & if they buy another unit they only have to buy the head unit to have it on both ends or they can simply use the one unit to scan when idling & then switch it up front to fish & not have to buy another at all.