Oh Naisu, just noticed my Echomap 73sv UHD came with the Gt-56TM Transducer (said it comes with the 54 when I purchased it). Not gonna install this ducer on my current boat, I'll be installing it on the new boat I'll be getting shortly. I'll be transferring the 73sv UHD for the trolling motor and adding a 106 or 126 Ultra at the console and networking them.