Ok my opinion, Lowrance, Hummingbird, Ray Marine, Garmin,and all the rest. Not enough money in Fort Knox to keep the latest technology on the market. And if you did the back of the boat would look like cheesecloth from all the holes needed for all the different transducers. In addition one needs a degree to operate these devices. And they say they are simple! Well for me they are not. I prefer to fish rather than push buttons.
Just as soon to have a good ole flasher. Sorry --- my opinion they are ripping folks off.