Cm93 V2 Charts Download High Quality Install Online
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.
QuteNav is a newer chart plotter application for Sailfish OS and Linux that supports CM93 v2 charts offline. If you are using this application, you must point it to the correct folder (for example, via DOTS → Chart Folders → Add) and perform a full database update to see the charts displayed correctly.
CM93_2010/ ├── 00300000/ │ ├── 00300000.A │ ├── 00300000.E │ └── ... ├── 00400000/ ├── ... └── CM93EDITION.DAT
Because CM93 v2 charts are a legacy, unmaintained format, there is no single official source for downloading them. The original distributions were on CD-ROMs with authorization codes from C-MAP, but those are no longer sold. Here are the primary methods for obtaining these charts: cm93 v2 charts download install
It is highly recommended to switch to S-57 ENC (Electronic Navigation Charts) . These are the international standard.
The OpenCPN project—and virtually all responsible navigational authorities—explicitly warns against using pirated copies of CM93 v2 charts for active navigation. According to the official OpenCPN documentation, CM93 is an old chart format originally used by C-Map. Unauthorized copies of these charts are widely available on the Internet, but these charts are no longer maintained, are out of date, and are of dubious providence. Consequently, they are .
Ensure is turned on (shortcut: press the Y key or click the quilt icon at the bottom right of the screen). Quilting seamlessly stitches the individual CM93 geographical cells together into a single, continuous world map. Adjust Vector Chart Display Textures Turn on OpenGL acceleration
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.
| Risk | Explanation | |------|-------------| | | Many ports changed since 2015; new buoys, dredged channels missing | | No official support | Cannot be used for commercial navigation under SOLAS or local regulations | | Legal liability | If an incident occurs using CM93 v2, your insurance may be voided | | Corrupted copies | Common CRC errors in .A/.B/.C files cause missing cells | | Cell boundary jumps | Discontinuities at chart cell edges due to old compilation |
: Because these are not "official" charts, they should only be used as a secondary aid to navigation, as they may contain outdated information. Installation Process (OpenCPN) Installing Charts - OpenCPN QuteNav is a newer chart plotter application for
Click the icon (the gear symbol) on the top toolbar.
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: Check the box for Depth Soundings to see spot depths.
: CM93 v2 uses a unique data structure consisting of numerous folders and files rather than standard S-57 formats.
