Learn how to navigate the high seas, the backcountry or just the local parks with this in-depth video instruction manual covering four of Magellan's top GPS units: the Meridian, the Marine, the Gold and the Platinum. The powerful devices are loaded with useful features to help people keep track of where they're going and where they've been: This step-by-step guide teaches you everything you need to know to get the most out of your unit.