Been awhile for this thread....
I recently discovered that Fugawi makes a free viewer for ENC charts. See http://www.fugawi.com/viewenc/viewenc.html to download. It's not for use with a GPS or anything but it is completely free and it does allow you to have up to 3 maps open at once. The features are pretty minimal, but what do you expect for nothing? I played around with it a bit on Sun and downloaded all the maps for the NW. It's a nice way to explore waters that you're planning to visit without paying a dime for software or maps.
Roger
I recently discovered that Fugawi makes a free viewer for ENC charts. See http://www.fugawi.com/viewenc/viewenc.html to download. It's not for use with a GPS or anything but it is completely free and it does allow you to have up to 3 maps open at once. The features are pretty minimal, but what do you expect for nothing? I played around with it a bit on Sun and downloaded all the maps for the NW. It's a nice way to explore waters that you're planning to visit without paying a dime for software or maps.
Roger