Below this top level, the directory contains numerous subdirectories with eight-digit numeric names ranging from 00300000 to 04501020 . There are typically 144 such subdirectories in a complete CM93 v2 dataset. Each subdirectory covers a geographical area of 40 degrees latitude by 40 degrees longitude.
: Ensure your final path looks similar to C:\Charts\CM93\GENCAT.DAT . Avoid nested folders like C:\Charts\CM93\CM93_2015\CM93\ . Double folders will prevent the software from reading the charts correctly. Step 3: Installing CM93 v2 in OpenCPN
: Go to Options > Charts > Vector Chart Display to set your boat's specific Safety Depth , Shallow Contour , and Deep Contour . This automatically color-codes safe waters versus shallow hazards based on your vessel's draft. Crucial Safety Notice for Navigators cm93 v2 charts download install
Different releases of CM93 v2 have different levels of accuracy and completeness. Some users have reported that newer editions inadvertently removed correct features that were present in older editions. Experiment with different versions of the dataset if you have access to multiple editions. The chart version is indicated by the .EXD filename—older versions may sometimes be more accurate for certain regions.
: Use a tool like WinRAR, 7-Zip, or the native OS extractor to unpack the files directly into your dedicated directory. Below this top level, the directory contains numerous
Official "v2" charts are technically outdated for primary, official navigation (commercial vessels now use CM93 Ed3 or S-57 charts). However, they are still excellent for hobbyists and backup planning. 2. CM93 v2 Charts Download
node node-cm93/bin/app.js scan -i cm93files/ -o cm93json/ -id 02100420,01500420 : Ensure your final path looks similar to
Click and select only the top-level folder containing the database.
While OpenCPN is the most common platform for CM93 v2 charts, other software also supports the format:
Once you've downloaded the CM93 V2 charts, follow these steps to install them:
After downloading, unzip/extract the files to a permanent location (e.g., C:\CM93_Charts\ or a dedicated folder on an external drive).
