Dataset
Open the software on your computer.
CM93 v2 (often written as CM93/2 or CM93-version2) is a vector-based electronic nautical chart format originally developed and distributed by C-Map, a company now owned by Jeppesen. Vector charts differ fundamentally from raster charts like paper scans: instead of being a static image, vector charts contain discrete, scalable objects such as depth contours, buoys, channels, and harbor infrastructure that can be zoomed in and out without losing clarity.
For harbor entrances, reef passages, and any area with recent changes, verify chart information with official Notices to Mariners or up-to-date ENC charts. cm93 v2 charts download install
: A complete, worldwide CM93 v2 chart set typically contains a master folder with numerous subfolders numbered 03000000 through 15000000 . The total folder size should be roughly 1.1 GB to 1.4 GB .
: Official support for CM93 v2 ended around 2014, and many versions found online are outdated or distributed via peer-to-peer sites. For safety, always cross-reference these with official, up-to-date NOAA ENC charts or o-charts . Where to Download CM93 v2 Charts Open the software on your computer
—the legendary, unencrypted vector maps that had guided cruisers across the world’s oceans for years.
OpenCPN will automatically detect the charts and start the "Rebuilding Chart Database" process. This may take several minutes depending on your computer speed. 5. Verifying and Using Your Charts Once the database is rebuilt, your charts should appear. For harbor entrances, reef passages, and any area
If you see blank gray water, your directory path is wrong, or OpenCPN could not read the encryption.
What are you running (Windows, Mac, Linux, or Android)? What version of OpenCPN or chartplotter app are you using? Which geographic region are you planning to navigate first?
The log file contains messages like “CM93Composite Chart Init cannot locate CM93 dictionary.”