I also have the Moore sub troll, I had one of the first units, they were called a "Penguin" analog speed digital temp. had a few issues which Morre took care off. Loved for a few years then started to see the digital speed & temp so I upgraded to that. I HATED the digital speed, it flips around so it hard to pinpoint your exact spped, so I switced back to analog speed. With a simple needle to show the speed you can at a quick glance pin point your speed when you get hit. I also found that mounting it on my downrigger board at teh back of the boat is the best location. It has worked great on the coated cable for many years.