Marine GPS System
Marine GPS systems are designed to be used on boats and other sea vessels. This GPS system helps you to determine your exact co-ordinates so that you never get lost at sea. Marine GPS units can be used while boating, deep sea fishing, fleet tracking, and various other marine applications.
Unlike other types of GPS systems, a marine GPS unit is typically weatherproof. These GPS units also feature marine mapping and back tracking abilities. Another feature that is exclusive to marine GPS systems is active sonar. All the GPS devices from the Garmin GPSMAP Series are a very good buy as far as marine GPS systems go. You should expect to pay over $250 for a basic marine GPS system.