PPC?
Would you consider a Pocket PC?I have a PPC that connects to my Garmin eTrex GPS. I use Memory-map software (memory-map.com) to view electronic charts and with the GPS it will show current boat location on the display.The PDA can also transfer routes, etc. to and from the Garmin unit, so you can set your waypoints and routes on the PDA (or even on your computer at home) and dowload them to the GPS.I can connect the PPC to my computer to download software, maps, routes, etc.; or I can connect the GPS directly to the computer to do the same. Memory Map has a package that includes both the PC and PDA versions of the software.The PPC is much more portable and easier to handle in the cockpit or down below.I usually use just the GPS while underway, but you can use it as a chart plotter. I setup my routes in advance at home on the computer. The PPC makes it easier to make changes or new routes (compared to the GPS) while cruising. Fair winds,Tom