Marcum Technologies, the undisputed leader in ice-fishing-specific sonar, takes tech to the next level. Their long-held principle is that features are useless unless they help an angler catch fish, and that can be seen throughout decades of innovation. Patented technology like moveable zoom that led to angler’s ability to target fish anywhere in the water column was the first ping heard round the world among the ice sonar community. They followed it up with additional advancements to help distinguish echoes from noise in an interference rejection system so advanced, it’s also patented.