Have been using GPSNavX for over a year on an iBook. We have watched them grow from a simple planning/chart plotter to a more robust system. They are continually updating the software that now includes displaying NMEA nav instrument display (speed, depth, etc), as well as support for AIS. They are the only chart plotting software that has made the effort to incorporate Maptech new 5.0 BSP electronic
charts. (These are the ones you get with one of their big map kits) Not everyone has these
charts yet and Maptech standard format is still 4.0, but GPSNavX took the effort to work with Maptech and expand their program. The program is a full chart plotting program that uses BSB 4.0 and 5.0
charts from Maptech and Softchart
charts (and a few others). All of the
charts are raster
charts which are scanned from the original NOAA
charts.