GPSNavX is the solution for the boater that wants to take the Mac aboard for real-time display of position on full color marine Softcharts and BSB raster charts. Just plug your GPS into your Mac and watch as your boat moves along in real-time, plotting a track behind the boat and logging your historic position on a digital chart. GPSNavX is loaded with many features. GPSNavX is also right at home for planning trips and charting out new destinations. A GPS is not required to work with charts.