There are a number of chart viewers available free. (you can even find them on maptech site) Others have GPS integration and are fully functional.
These are the NOAA charts. Real charts.
It was my understanding that NOAA was annoyed with Maptach's marketing and fee structures. Nice that they are now in the public domain (again). I was just looking for any (lurid) details.
Now if only non-US charts would become in the public domain.
I have 11 regions from Mexico to Canada that I use for work. Even with an educational discount it was a pretty penny. Plus the encryption was/is a pain in the ass. We tend to douse our computers in the field every once in a while. New keys were provided but that takes time.
--Ethan