Most ice anglers use a flasher instead of a graph type machine used on boats. There are circular display and vertical display flashers. I have a Marcum Showdown Troller 2.0 flasher combo. Like
THIS Without a "gizmo" you have no idea how deep the water is or if there are fish present. With a flasher, you can know both things BEFORE YOU DRILL because the flasher can see through the ice. Once you are fishing, you can see fish right below your hole at any depth, and actually see them approach your bait before they bite. Or see them approach and NOT bite, which might be even more valuable info. It's a game changer.
