f you're looking for the finest color GPS unit available, take a look at a chartplotter from Furuno. The fully integrated GP1870F GPS/Chartplotter/Fishfinder is compact, waterproof and durable. This unit delivers highly accurate data and crystal-clear pictures on its 7" color bonded LCD screen. Fast, powerful and easy to use, the GP1870F incorporates the best of Furuno's legendary line of chartplotters and adds an updated set of user-friendly features.