Browse your computer to locate and highlight your root CM93 folder. Click or Select Folder . 3. Update the Database
you need a quick global overview for passage planning, or you’re sailing somewhere with no official charts available.
Vector charts require specific software configurations to display clearly without cluttering your screen or slowing down your processor. Essential Performance Adjustments cm93 v2 charts download install
CM93 v2 charts are a well-known standard in the maritime community for electronic navigation. They are raster charts (or more accurately, a hybrid vector/raster format) widely used in navigation software like OpenCPN, SeaClear, and various plotters.
The charts were typically distributed on CD-ROMs that required an authorization code from C-Map to unlock. Instructions for the official installation process involved using C-Map’s own tools (like the NTPC Selector) and required the presence of a hardware dongle in some cases. Browse your computer to locate and highlight your
Note: CM93 datasets are large; ensure sufficient disk space (several GBs depending on coverage).
Ensure the subfolders (the numbered directories) are directly inside this main folder. Step 2: Add the Directory to OpenCPN Launch . Update the Database you need a quick global
Before opening your chartplotting software, you must correctly position the files on your computer or onboard navigation drive.
Which are you using? (Windows, Mac, Linux, or Android?)
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.
CM93 v2 charts are no longer maintained by C-Map. They are outdated and often distributed unofficially. While useful for planning or as a backup, they should not be relied upon as the primary source for safe navigation . 2. CM93 v2 Charts Download & Sourcing
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