You can already. Get the files (overlay) for GE(Google Earth) from earthnc.com They have Noaa and other overlays.
You can set this all up from home witht he internet connection, in GE, increase the cache to something like 3 gigs and then while at home, zoom in and around the area you plan on sailing and it will store those images on the harddrive and access them when your out on the water without internet access.
Good instructions can be found here.
www . gearthblog.com/blog/archives/2007/08/sailing_with_google_earth_for_navigation.html
Originally Posted by canadianseamonkey
Seems that I'm not the only one with the bad habit of surfing Google Earth. On the new version, they have added Google Sky, which is okay, but not fantastic. However, I've been thinking of how cool it would be for Google Earth to team up with the NOAA and create a Google Nav Chart system, where we would have the best of both world. This wouldn't be that difficult to do and it would be something else to take our mind of work.
Not sure if you would ever be able to use it to navigate, maybe in time, but for now it would just be a great way to incorporate both systems.