Just hooked up a HDS PRO 12 for a friend that bought it as a demo at a cheap price without a transducer. We decided to use a standard active image transducer not the HD version because it was already on the boat. When we got it out on the water it just had lines across the screen. Also, when you went to source in your menu bar there wasn't a choice for active imagine transducer it just said this unit. If its compatible I know there is something wrong with the settings just seeing if you guys could tell me if its compatible or not.