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The GPS can be used on land, at sea and in the air. The only time the GPS fails is when it is unable to receive a signal like when you are inside most buildings, in caves or subterranean locations, or underwater. But unless you are often within those type of areas, the GPS is a must-have. Aside from its usual purposes, the GPS can go beyond vehicle tracking or map navigation.

The Garmin GPSMAP 478 GPS Receiver
The Garmin GPSMAP 478 GPS Receiver can go from the box straight to your boat or to your dash. It has an optional weather and sonar capabilities combined and a lets you plug in data cards allowing you to add more maps and features. It's preloaded with U.S. marine charts utilizing elements of the latest BluChart g2 technology, in addition to the default detailed street level mapping. The g2 mapping that it features offers a smoother and more fluid presentation on screen. Perfect for road trips, the Garmin GPSMAP 478 GPS Receiver comes with a City Navigator NT detailed street maps for North America including an industry leading database with more than six million points of interest like hotels, restaurants, gas stations, attractions and more.






