: 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 back to . Here you can tailor the safety and detail parameters:
Keep the entire directory structure intact in a dedicated folder. Add the top-level folder to OpenCPN via Tools > Charts . Safety Use as backup only; check with current Notices to Mariners.
Turn on OpenGL acceleration. Go to Options > Display > Advanced and check Use OpenGL . This shifts the graphics rendering from your CPU to your graphics card, making zooming and panning instantaneous.
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For educational and archival purposes, the general steps for installing CM93 v2 in OpenCPN (the most common host) are as follows. Note: This assumes you have legally obtained the files, e.g., from a legitimate old purchase or backup.
For route planning, familiarization, and backup purposes, CM93 v2 charts can be a useful tool. They are particularly helpful for open-ocean passages where the seabed changes little from year to year. But for harbor approaches, coastal navigation near hazards, and any situation where precision matters, you should rely on official, up-to-date charts obtained through legitimate channels.
If you are using MaxSea or TimeZero, the installation process is slightly different:
CM93 version 2 charts use a unique data structure unlike standard S-57 ENC charts. A complete global dataset typically includes 144 subdirectories, each covering a geographic area.