One type of fish finder that’s especially good for mid-size boats are fish finder chartplotter combos. Fish finder chartplotter combos allow you to see both the GPS as well as the fish finder. Some models will even let you do so on the same screen! Most will allow you to toggle between split-screen or one or the other. This can be very helpful for those looking to expand their fishing repertoire. Whether you need chartplotters and combos, or any other type of marine GPS chartplotters, let ReelTrail take care of the research for you. Find all your marine GPS chartplotters in one place, whether you're buying or selling! ReelTrail.com is the marketplace for outdoor enthusiasts to buy and sell new, used, vintage, and handmade gear online. Welcome to the ultimate website for outdoor gear and adventures.