: The subdirectories represent geographical areas of 40° x 40°, with the filenames based on coordinates. 2. Download Sources
Before downloading CM93 v2 charts, it is important to ensure that your navigation software supports the format. Here are some of the most popular options:
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Within these folders, charts are organized by scale from Z (world overview) down to G (detailed harbour plans). cm93 v2 charts download install
Once you've downloaded the CM93 V2 charts, follow these steps to install them:
These charts are old; the codebase is even older. Here’s how to make them run smoothly on a laptop or marine PC:
[CM93_Root_Folder] │ ├── 20110803.EXD (Database edition file) │ ├── [Other system files] │ ├── /00300000 (Geographical grid folder) ├── /00300010 └── /04501020 (Geographical grid folder) CM93 v2 vs. CM93 v3 : The subdirectories represent geographical areas of 40°
QuteNav is a newer chart plotter application for Sailfish OS and Linux that supports CM93 v2 charts offline. If you are using this application, you must point it to the correct folder (for example, via DOTS → Chart Folders → Add) and perform a full database update to see the charts displayed correctly.
Disclaimer: Ensure your source provides reliable data, as outdated charts can be hazardous.
I can provide specific troubleshooting steps to get your chart system running smoothly. Share public link Here are some of the most popular options:
Disclaimer: This article is for educational purposes. The CM93 v2 format is copyrighted material. While many sailors possess copies, official commercial use requires a licensed C-Map subscription.
After adding the directory, click . OpenCPN will automatically scan the directory for recognized chart formats. Because CM93 v2 charts are structured in folders, the scanning process may take several minutes if the entire world database is large. You should see progress indicators showing the chart files being processed. Once the scan is complete, close the Options dialog.