While feature competitive navigation software has been sparse for the Macintosh in the last couple years, the folks at GPSNavX are doing their part to remedy the situation. Version 3.00 of the program includes features like GRIB weather overlays, and radar target tracking (not radar overlay, but display of designated targets from a radar). There’s even AIS display for tracking shipping traffic equipped with AIS transmitters. It lacks chart quilting, vector charts, and anti-aliased display, which are useful and expected features in advanced charting programs on the PC, but at $50 for a downloaded copy, GPSNavX looks like an excellent value. They also sell a number of bundles with GPS receivers which may be of interest. Best of all, there is a free trial version on their website—so check it out!

Link: GPSNavX