one of those depth finder things that you put on the ice and shoot a beam down to see how deep. But i JUST HAD TO have it. No matter what i did, i could not get an accurate reading from it. I don’t even know where it is anymore.
………….also a jaw jacker
that small flashlight looking Marcum locator was one of the best things I ever bought. It needs fairly clear ice and you need to use water on the ice. Great time saver.