CM93 v2 Charts: Complete Download and Installation Guide CM93 v2 charts are a standard for world vector charts used extensively by the yachting community in OpenCPN and other marine navigation software. While these charts are technically legacy data—originally developed by C-Map—they remain a popular resource for planning and secondary navigation. Understanding CM93 v2 Charts
: OpenCPN and qtVlm are the most common platforms that support this format. Note that CM93 v3 is a different, encrypted format and is not compatible with OpenCPN. Where to Download CM93 v2 Charts cm93 v2 charts download install
CM93 version 2 charts use a unique data structure unlike standard S-57 ENC charts. A complete global dataset typically includes 144 subdirectories, each covering a geographic area. CM93 v2 Charts: Complete Download and Installation Guide