Originally Posted by
vic n
You need to post some of your questions on the electronics forum. First, you want to find out if the Ulterra is similar to the Terrova. By that I mean: can a transducer cable be attached without causing problems. Both TM's slide up and down on the shaft when deployed, so any cables have to be routed with this in mind. On the Terrova there is a groove running the whole length of the shaft, and a H'bird cable will fit. If there is no groove, you may have to use the US2 transducer, and that has no DI/SI capability. There are alternate mounts, but it is another item to attach to the front of the boat.
If you decide to go with the 899 up front, I would definitely not install on trolling motor, because it is important to go pretty straight and all of the little adjustments we make with the TM really mess up the picture on SI. DI will work much better on the TM tho. My set up is 899 at the console with transducer on the transom, and an 859 at the bow with the transducer on the TM and the two are linked with ethernet to share waypoints.
Take you time in order to get this right. I thought I had everything I wanted, but my dealer still made a lot of errors that I will have to fix at my own expense. There are HD transducers for each of these, and if you exchange the originals with H'bird, the cost is minimal. But if your dealer installs the originals, you are stuck with them.