Once January settles in, my underwater camera systems become some of the most important implements in my fish-finding toolbox. The primary benefits of underwater cameras are, of course, the unique visual perspectives that only a full-color video feed can provide. With a camera, you can easily distinguish between green and brown weeds, focusing shallow water efforts in the most productive areas. You can also use a camera to monitor your lure while fishing, so that you can set the hook when you see a fish strike, rather than waiting to feel that bite. This is a significant advantage when fishing for lethargic mid-winter panfish, which can inhale and reject a bait without even causing a sensitive spring bobber to twitch. Some cameras also have an integrated thermocouple that provides the water temperature at the camera’s depth. With this feature, you can quickly locate the warmest available water, and frequently, the most active fish.