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
What are CM93 V2 charts?
Windows:
Click Add Directory and select only the top-level folder containing the database.
Format: The top directory typically contains a file with a .EXD extension (e.g., 20110803.EXD), which indicates the edition date. cm93 v2 charts download install
). Do not leave them in your "Downloads" folder to avoid accidental deletion. Open OpenCPN Settings: Launch OpenCPN and click the (wrench icon) button. Add Chart Directory: Chart Files Add Directory Navigate to and select your main Update the Database: Ensure "Scan Charts and Update Database" is checked.
Have a specific error not covered? Visit the official OpenCPN forums or the CruisersForum "Navigation" section. Do not ask for pirated links—ask for help with chart paths and encryption. CM93 v2 Charts: Complete Download and Installation Guide
Tweaking Settings: CM93 v2 uses a proprietary scale system. In Options → Charts → Vector Charts tab, set CM93 Detail Level to a medium value (e.g., 25–35) to avoid clutter. Also, enable Reduce details at small scale for performance.