o-charts offers professionally maintained vector charts for OpenCPN based on official hydrographic data. A full world map costs around €60–€100 per year. These are legal, updated regularly, and directly integrate with OpenCPN.
While CM93 v2 charts can still be downloaded legitimately through official C-MAP channels, the format is deprecated. Unauthorized downloads are unsafe, illegal, and unreliable. For operational navigation, always use a licensed, updated chart source.
Appendix A: Example of Legitimate Download Page
Appendix B: Legal Disclaimer
This report does not encourage any unauthorized reproduction of copyrighted nautical charts. Users must comply with all applicable maritime and copyright laws. cm93 v2 charts download
CM93 v2 charts are a legacy set of global vector charts originally developed by C-MAP. While they were once a standard for maritime navigation, they are now considered outdated and are generally no longer maintained or officially updated. Understanding CM93 v2 Charts
Vector Format: Unlike raster charts (scanned paper), CM93 v2 is a vector format that allows for zooming without loss of clarity and the ability to toggle specific data layers.
Data Structure: A complete set typically consists of a "CM93" root directory containing approximately 144 subdirectories (e.g., "00300000" to "04501020") and an edition file with a .EXD extension (e.g., 20110803.EXD). Appendix A: Example of Legitimate Download Page
Compatibility: They are primarily known for being compatible with OpenCPN, which still supports this older format. Downloading and Installing
Since CM93 v2 is obsolete and subject to copyright, there are no official public download sources. They are often shared privately within the sailing community or found on legacy file repositories. Installing Charts - OpenCPN
Some sailors sell old laptops, hard drives, or CD-ROMs that contain legally purchased but outdated CM93 v2 charts. Buying a used hard drive with charts is a gray area—you do not own the license, but you are also not actively downloading cracked software. Appendix B: Legal Disclaimer This report does not
In the world of digital marine navigation, few chart formats have achieved the legendary status of CM93. For decades, these charts have been the standard for cruisers, sailors, and commercial skippers using navigation software like OpenCPN.
If you are looking for information on CM93 v2 charts download, this guide explains what these charts are, why they remain popular, and the critical legal and technical considerations you must know before using them.
CM93 charts are copyrighted material owned by C-MAP/Navico. They are proprietary commercial products.
Warning: Downloading copyrighted chart data without a license is illegal in many jurisdictions.