I'm a little weak in knowledge in this department: is NAVTEX the text weather updates for a given area, or does it include the sort of synoptic charts you get over Weatherfax?
Is this basically world-wide Weatherfax in a small box on a USB cable? Because that is something I could really use: large scale weather maps without the need for an internet connection.
What are the ranges of such units? While I will have SSB and therefore the ability to receive data most places, this is frankly more convenient as my nav station outputs will be laptop-displayed.