Because C-MAP no longer sells or distributes CM93 v2 charts, virtually all copies available for download on the internet are pirated legacy copies hosted on file-sharing networks, torrent sites, or obscure sailing forums. Downloading these files carries several risks:
Unlike raster charts (which are essentially digital pictures of paper charts), CM93 charts are . This means they are a database of objects (buoys, depth contours, lights, land masses) that can be queried.
The quality of data depends on the version of the CM93 dataset you download. Some sets are outdated and may lack recent soundings. Important Considerations cm93 v2 charts download
The most authoritative and free source is the for the United States and its territories. NOAA provides official, up-to-date S-57 ENC vector charts free of charge. These can be downloaded via the "Chart Downloader" plugin in OpenCPN.
Under > Charts , look for the Vector Chart Display settings. Because C-MAP no longer sells or distributes CM93
. One of the few ways to get a complete global vector chart set in a single directory. Legal Status Grey Market/Pirated
While designed for C-MAP systems, the v2 format is widely supported by navigation software like OpenCPN . The quality of data depends on the version
To use CM93 v2 charts effectively, it's helpful to understand the system's underlying file and geographic organization.