that doesn't have to be drilled, but for the life of me I can't think of the name right now. It used a strong waterproof adhesive that sticks to the transom & then the transducer mounts to it. If you have a jackplate & want it console mounted the simplest, cleanest & safest thing for the transducer to do is to get a Humminbird y cable for onplane depth readings from a regular Humminbird 2-d transom mounted or in hull transducer & drill & mount the side imaging transducer on your jackplate with a clear line of sight when trimmed down for scanning. I usually drill towards the bottom of the plate & have never had any issues with sonar bouncing inside the plate interference. Then drill 1 hole by console to run the wires through which will be covered & use a ram mount for the 998 or simply fabricate a mount to be able to install it in the dash. Of course if wanting it at the trolling motor too you can get another complete station & a trolling motor transducer & use the head unit up front if wanted when fishing. Not a big deal at all to drill the hole in the plate & only 4 screws to hold station in place up front.