'link' Download Install — Cm93 V2 Charts
CM93 v2 charts are a legacy worldwide vector chart format commonly used with OpenCPN. While officially obsolete and often shared through unofficial channels, they remain popular for hobbyist marine navigation. 1. Verification of Format
Before installing, ensure you have the correct version. OpenCPN supports CM93 v2, but does not support CM93 v3 due to encryption.
v2 Indicators: The directory should contain approximately 144 subdirectories (named with 8-digit numbers) and a specific .EXD file (e.g., 20110803.EXD).
Data Structure: The subdirectories represent geographical areas of 40° x 40°, with the filenames based on coordinates. 2. Download Sources
Because CM93 v2 is no longer sold commercially, it is typically found on community forums or archival sites:
Public Archives: Users often share links on Maritime Forum or via Facebook Groups.
Warning: Be cautious of "free download" sites that prompt for EXE file downloads or Flash Player installs, as these are often malicious. 3. Installation Steps for OpenCPN
Once you have the folder (e.g., "CM93_2011"), follow these steps to load it into OpenCPN: Open Settings: Click the "Options" (gear icon) in OpenCPN.
Navigate to Charts: Select the Charts tab, then Chart Files. cm93 v2 charts download install
Add Directory: Click Add Directory and browse to the folder containing your CM93 files (select the top-level folder that contains the 144 subdirectories).
Rebuild Database: Click Apply or OK. OpenCPN will scan the folders and build a database.
View Charts: If successful, the world map will now show detailed vector data when you zoom in on coastal areas. 4. Important Considerations Installing Charts - OpenCPN
CM93 v2 Charts: Complete Download and Installation Guide CM93 v2 charts are a standard for world vector charts used extensively by the yachting community in OpenCPN and other marine navigation software. While these charts are technically legacy data—originally developed by C-Map—they remain a popular resource for planning and secondary navigation. Understanding CM93 v2 Charts
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.
Version Identification: A valid CM93 v2 directory contains an empty file with a .EXD extension (e.g., 20110803.EXD), which indicates the edition's release date.
Scale Levels: The data is organized into scale levels from 'Z' (world overview) down to 'G' (detailed harbor plans).
Compatibility: OpenCPN and qtVlm are the most common platforms that support this format. Note that CM93 v3 is a different, encrypted format and is not compatible with OpenCPN. Where to Download CM93 v2 Charts CM93 v2 charts are a legacy worldwide vector
Because CM93 v2 is no longer commercially updated, these charts are often distributed through community-maintained links and maritime forums. Installing Charts - OpenCPN
The Complete Guide to CM93 v2 Charts: Downloading, Installing, and Troubleshooting
For cruisers, commercial mariners, and weekend sailors alike, electronic navigation has become the backbone of modern piloting. Among the myriad of chart formats available, one name has persisted as a legend in the community—CM93 v2 (also known as C-Map CM-93/3). Despite being technically "outdated" by official hydrographic standards, the CM93 v2 chart set remains the most widely used global offline chart library in the world, primarily due to its integration with OpenCPN (Open Chart Plotter Navigator).
But what exactly is CM93 v2? Is it legal? How do you actually download it and install it for use on a laptop, Raspberry Pi, or onboard navigation PC?
This 2,500+ word guide will walk you through everything—from understanding the file structure to a step-by-step installation guide and troubleshooting common errors.
Part 5: Solving the "No Maps Found" Error (Encryption & Keys)
The most common issue after "installation" is OpenCPN showing an empty map. This is due to encryption.
CM93 v2 charts are encrypted with a proprietary C-Map key. OpenCPN includes a reverse-engineered decoder, but your chart set might need a specific CM93_Key.txt file.
Conclusion: Smart Navigation with Legacy Charts
Downloading and installing CM93 v2 charts is a rite of passage for the modern cruiser. It provides a free, globally consistent vector chart base that still beats many commercial offerings for offshore passage planning.
Recap of the process:
- Acquire the 2013 Ed3 folder via torrent or forum link.
- Extract to a permanent location (e.g.,
CM93_2013/).
- Install OpenCPN and point it to the folder.
- Force rebuild and optionally add the
CM93_Key.txt.
- Test by zooming into a known harbor like Southampton or Sydney.
Remember the golden rule of electronic navigation: Two sources are one; one source is none. Use CM93 v2 alongside a free mobile app (like Navionics boating trial) or a satellite overlay. That way, when the old chart is wrong, you have a second opinion.
Now go download, install, and sail with confidence—but keep one hand on the paper chart.
Have a specific error not covered? Visit the official OpenCPN forums or the CruisersForum "Navigation" section. Do not ask for pirated links—ask for help with chart paths and encryption.
Important Legal & Ethical Note:
CM93 v2 charts are proprietary, copyrighted material originally produced by C-Map (now Navico/JEOTECH) . They are no longer officially sold or supported for consumer use. The version widely available online is an unauthorized, decade-old dataset (circa 2010–2016).
This report is for legacy/educational purposes only. For legal navigation, you must use official, up-to-date charts from your hydrographic office or authorized vendors (e.g., C-MAP, NV Charts, Navionics, Official ENCs).
4.1 Prerequisites
- OpenCPN installed (Windows, macOS, Linux, or Raspberry Pi)
- CM93 v2 folder on local drive (or USB/SD card)
2. Typical Sources (Legacy/Archival Only)
In practice, CM93 v2 is obtained from:
- Old hard drives of former users
- Nautical file-sharing archives (e.g., "CM93 Ed2 2010" or "CM93 2013")
- Third-party compilation disks (often labeled “Global Charts”)
No legitimate download from C-MAP exists – they have moved to subscription-based CMAP Reveal / Charts.
3. Download the Charts
- Navigate to the Download Section: Once on the support page, search for map updates or specifically for "CM93 v2" charts.
- Select Your Device Model: You’ll likely need to choose your device model or the software you’re updating.
- Download the Update: Follow the prompts to download the CM93 v2 charts. Ensure you download the correct version for your device.
Guide: Understanding, Downloading, and Installing CM93 v2 Charts
CM93 v2 charts are a well-known standard in the maritime community for electronic navigation. They are raster charts (or more accurately, a hybrid vector/raster format) widely used in navigation software like OpenCPN, SeaClear, and various plotters.
CM93 v2 charts are a legacy worldwide vector chart format commonly used with OpenCPN. While officially obsolete and often shared through unofficial channels, they remain popular for hobbyist marine navigation. 1. Verification of Format
Before installing, ensure you have the correct version. OpenCPN supports CM93 v2, but does not support CM93 v3 due to encryption.
v2 Indicators: The directory should contain approximately 144 subdirectories (named with 8-digit numbers) and a specific .EXD file (e.g., 20110803.EXD).
Data Structure: The subdirectories represent geographical areas of 40° x 40°, with the filenames based on coordinates. 2. Download Sources
Because CM93 v2 is no longer sold commercially, it is typically found on community forums or archival sites:
Public Archives: Users often share links on Maritime Forum or via Facebook Groups.
Warning: Be cautious of "free download" sites that prompt for EXE file downloads or Flash Player installs, as these are often malicious. 3. Installation Steps for OpenCPN
Once you have the folder (e.g., "CM93_2011"), follow these steps to load it into OpenCPN: Open Settings: Click the "Options" (gear icon) in OpenCPN.
Navigate to Charts: Select the Charts tab, then Chart Files.
Add Directory: Click Add Directory and browse to the folder containing your CM93 files (select the top-level folder that contains the 144 subdirectories).
Rebuild Database: Click Apply or OK. OpenCPN will scan the folders and build a database.
View Charts: If successful, the world map will now show detailed vector data when you zoom in on coastal areas. 4. Important Considerations Installing Charts - OpenCPN
CM93 v2 Charts: Complete Download and Installation Guide CM93 v2 charts are a standard for world vector charts used extensively by the yachting community in OpenCPN and other marine navigation software. While these charts are technically legacy data—originally developed by C-Map—they remain a popular resource for planning and secondary navigation. Understanding CM93 v2 Charts
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.
Version Identification: A valid CM93 v2 directory contains an empty file with a .EXD extension (e.g., 20110803.EXD), which indicates the edition's release date.
Scale Levels: The data is organized into scale levels from 'Z' (world overview) down to 'G' (detailed harbor plans).
Compatibility: OpenCPN and qtVlm are the most common platforms that support this format. Note that CM93 v3 is a different, encrypted format and is not compatible with OpenCPN. Where to Download CM93 v2 Charts
Because CM93 v2 is no longer commercially updated, these charts are often distributed through community-maintained links and maritime forums. Installing Charts - OpenCPN
The Complete Guide to CM93 v2 Charts: Downloading, Installing, and Troubleshooting
For cruisers, commercial mariners, and weekend sailors alike, electronic navigation has become the backbone of modern piloting. Among the myriad of chart formats available, one name has persisted as a legend in the community—CM93 v2 (also known as C-Map CM-93/3). Despite being technically "outdated" by official hydrographic standards, the CM93 v2 chart set remains the most widely used global offline chart library in the world, primarily due to its integration with OpenCPN (Open Chart Plotter Navigator).
But what exactly is CM93 v2? Is it legal? How do you actually download it and install it for use on a laptop, Raspberry Pi, or onboard navigation PC?
This 2,500+ word guide will walk you through everything—from understanding the file structure to a step-by-step installation guide and troubleshooting common errors.
Part 5: Solving the "No Maps Found" Error (Encryption & Keys)
The most common issue after "installation" is OpenCPN showing an empty map. This is due to encryption.
CM93 v2 charts are encrypted with a proprietary C-Map key. OpenCPN includes a reverse-engineered decoder, but your chart set might need a specific CM93_Key.txt file.
Conclusion: Smart Navigation with Legacy Charts
Downloading and installing CM93 v2 charts is a rite of passage for the modern cruiser. It provides a free, globally consistent vector chart base that still beats many commercial offerings for offshore passage planning.
Recap of the process:
- Acquire the 2013 Ed3 folder via torrent or forum link.
- Extract to a permanent location (e.g.,
CM93_2013/).
- Install OpenCPN and point it to the folder.
- Force rebuild and optionally add the
CM93_Key.txt.
- Test by zooming into a known harbor like Southampton or Sydney.
Remember the golden rule of electronic navigation: Two sources are one; one source is none. Use CM93 v2 alongside a free mobile app (like Navionics boating trial) or a satellite overlay. That way, when the old chart is wrong, you have a second opinion.
Now go download, install, and sail with confidence—but keep one hand on the paper chart.
Have a specific error not covered? Visit the official OpenCPN forums or the CruisersForum "Navigation" section. Do not ask for pirated links—ask for help with chart paths and encryption.
Important Legal & Ethical Note:
CM93 v2 charts are proprietary, copyrighted material originally produced by C-Map (now Navico/JEOTECH) . They are no longer officially sold or supported for consumer use. The version widely available online is an unauthorized, decade-old dataset (circa 2010–2016).
This report is for legacy/educational purposes only. For legal navigation, you must use official, up-to-date charts from your hydrographic office or authorized vendors (e.g., C-MAP, NV Charts, Navionics, Official ENCs).
4.1 Prerequisites
- OpenCPN installed (Windows, macOS, Linux, or Raspberry Pi)
- CM93 v2 folder on local drive (or USB/SD card)
2. Typical Sources (Legacy/Archival Only)
In practice, CM93 v2 is obtained from:
- Old hard drives of former users
- Nautical file-sharing archives (e.g., "CM93 Ed2 2010" or "CM93 2013")
- Third-party compilation disks (often labeled “Global Charts”)
No legitimate download from C-MAP exists – they have moved to subscription-based CMAP Reveal / Charts.
3. Download the Charts
- Navigate to the Download Section: Once on the support page, search for map updates or specifically for "CM93 v2" charts.
- Select Your Device Model: You’ll likely need to choose your device model or the software you’re updating.
- Download the Update: Follow the prompts to download the CM93 v2 charts. Ensure you download the correct version for your device.
Guide: Understanding, Downloading, and Installing CM93 v2 Charts
CM93 v2 charts are a well-known standard in the maritime community for electronic navigation. They are raster charts (or more accurately, a hybrid vector/raster format) widely used in navigation software like OpenCPN, SeaClear, and various plotters.
