I've got a really great tip for all of you who use two finders with one on the bow mount. When you are trolling, keep the bow mount in the water and use it to see what is coming up. I fish Georgian Bay all of the time and some of the water is tea stained or on cloudy days, you can't see in the water very well, so I keep an eye on the fish finder in the bow and it not only saves me from running up on a shoal that is just under water, it is also a good indicator when the water is getting shallower and it is time to turn the boat.