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: Built directly into OpenCPN, this tool allows you to download free, official charts (like NOAA for the US).
Unlike official NOAA charts , CM93 v2 charts do not reflect recent changes in coastal features or buoy positions. How to Use CM93 with OpenCPN
have become the standard for professional navigation, CM93 (specifically Version 2) remains popular in the cruising community because it is unencrypted and compatible with free software like Downloading and Installing CM93 (2021 Data)
If you specifically want C-Map data, purchase a chart card or subscribe to C-Map Cloud for integrated on-board navigation. This provides legal, up-to-date, and supportable charts.
Instead of chasing an outdated and risky download, consider these legitimate options—many of which are free or very low cost.