I just figured out how to download and use Raster Charts from the NOAA web page. I found a piece of free software and downloaded it into my laptop. Going through the web site that I used to find the charts I then downloaded 127 charts, for free, to my lap top. The detail is as good as my paper charts on my boat but it is cool to see them this way. You can actually zoom up in some areas that are cluttered on my paper charts. The zoom is pretty clear. I am trying to post the link on where I found the free software and charts.