The government does hold a copyright on the charts.
CHS - Copyright and Licensing
Also scanning the charts will not do you much good as the information related to lat and long, etc. will not be embedded.
i just bought the PAC 01 and PAC 02 so that I have the charts to get me around Vancouver Island. Each was $175. I also carry a collection paper charts.
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As I sail, I praise God, and care not. (Luke Foxe)