Because CM93 v2 is a discontinued format, there is no official download source. However, the charts can be found through various community channels:
Zoom in on various regions of the world map. Initially, you may see only outline boxes representing available chart coverage. As you zoom in, OpenCPN will automatically load the appropriate scale-level chart. If you see green squares in place of charts, you have successfully added the directory—zoom in further on a green square to load the actual chart.
OpenCPN treats CM93 v2 as one of several supported chart types. When you add the directory, OpenCPN builds a composite view, automatically selecting the appropriate scale-level chart based on your zoom. It also supports multiple CM93 datasets simultaneously and can combine CM93 vector charts with raster charts in formats like BSB/KAP or official ENC charts. cm93 v2 charts download install
Click and select only the top-level folder containing the database.
CM93 v2 files usually come in a compressed .zip or .rar format. Use a tool like 7-Zip to extract them into a dedicated folder on your computer (e.g., C:\Charts\CM93 ). Because CM93 v2 is a discontinued format, there
Official Electronic Navigational Charts (ENCs) are produced by national hydrographic offices and conform to the IHO S-57 (and now S-100/S-101) standards. These are the charts used in commercial shipping and certified ECDIS (Electronic Chart Display and Information Systems). CM93 v2, by contrast, is a proprietary format originally intended for recreational and commercial navigation systems, but it does not carry the same official certification status.
The CM93 v2 chart format holds a legendary status among cruisers, sailors, and navigation enthusiasts. Despite being officially discontinued by its creator, C-Map, this vector chart format continues to power countless navigation software setups around the world. Whether you are planning a coastal voyage or an ocean crossing, understanding how to work with CM93 v2 charts can be an invaluable skill. This comprehensive guide covers everything from the basics of the format to advanced installation techniques across various software platforms. As you zoom in, OpenCPN will automatically load
Newer versions of OpenCPN continue to improve chart handling, even for legacy formats like CM93 v2.
: Set your display category to Standard or Mariner's Standard . Selecting "All" displays every single underwater cable and minor point, which heavily slows down screen panning.