I've made about 20 of them like that but I can't see them on my down scan or side imaging graph. I just have to know where they are. I usually spot them by seeing fish on them but I've yet to catch a crappie off of them. I may have put them in the wrong area of the lake. I will admit that they are much easier to put together in the boat at the place that you're going to sink them then trying to put them together and haul them out there. You can carry quite a few at one time doing it this way.