Thank you for a very informative and useful post, Jerry. I have seen my jig on the graph at times. At other times, I wasn't able to pick it up. This gives me some insight as to how to adjust the "thangie" so I will be more able to tell exactly what I am seeing.

Mine doesn't show arches. It's a Lowrance, but probably a lower end unit. I do have fish id on it and fish alarm. I never use the fish alarm, but have put the fish id on at times. It ,sometimes, will give me an idea of how deep the fish are holding.

Right now, I mostly use it to determine depths and drop offs. I'm starting to be able to identify cover, weather it be brushpiles or rockpiles or whatever...that I've yet to learn.

With more use and messing with it, and pickin' your and other folk's brain about em, I may just be able to use one effeciently one day!

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"Be Ye Fishers of Men" You catch them- He will clean them