The CHS charts have a lots features not found on paper charts; photos and other information from sailing directions, etc.. OpenCPN is not using that data; other programs do.
While it would be nice to have free charts like our neighbours to the south, our government does copyright the materials.
The cost of a CD with, about 75 charts, is about what 9 charts would cost.
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As I sail, I praise God, and care not. (Luke Foxe)