In OpenCPN, this is accomplished through the Chart Groups feature, accessible through the Options → Charts → Chart Groups tab. You can define which directories belong to which group and quickly toggle between groups using the toolbar. Many cruisers recommend creating a C:\CHARTS directory on your navigation computer and organizing all your charts there for easy access.
: Set this to your vessel's draft plus your preferred safety margin.
Q: How often are CM93 V2 charts updated? A: CM93 V2 charts are regularly updated to ensure that they remain accurate and up-to-date. The frequency of updates may vary depending on the region and the chart type.
To download and install CM93 v2 charts, you primarily use , a free open-source navigation software that supports this legacy global vector chart format. 1. Download OpenCPN and CM93 v2 Charts
CM93 v2 Charts: Complete Download and Installation Guide CM93 v2 charts are a legacy worldwide vector chart database frequently used by offshore sailors and cruisers. While newer formats like CM93 v3 and S-63 exist, CM93 v2 remains popular due to its compatibility with free navigation software like OpenCPN and its relatively small file size. What are CM93 v2 Charts? cm93 v2 charts download install
These charts offer comprehensive world-wide coverage, covering large-scale ocean views down to detailed harbor plans.
Understanding the file structure is helpful for successful installation:
Many integrated bridge systems, such as Furuno ECDIS and Raytheon Pathfinder, can read CM93/3 and older CM93/2 charts. However, these commercial systems typically require authorized chart updates and licenses, as they are designed for professional navigation under SOLAS regulations.
This article will guide you through understanding what CM93 v2 is, where to obtain them legally, and how to install them on your navigation system. 1. What are CM93 v2 Charts? In OpenCPN, this is accomplished through the Chart
| Chart Source | Coverage | Cost | |---|---|---| | | Worldwide | Paid (affordable for OpenCPN users) | | NOAA ENC Charts | USA waters | Free (via Chart Downloader plugin) | | Official Hydrographic Offices | Various countries | Varies (often free or low-cost) | | Navionics, C-MAP (modern) | Worldwide | Subscription |
Official marine navigation authorities universally recommend using authorized, up-to-date, official chart products for navigation. Free and community-distributed chart sets should only be used for planning, education, or as a backup reference, never as a primary source for navigation in unfamiliar or hazardous waters.
Before proceeding with any download or installation, it is important to understand the legal status of CM93 v2 charts.
geographic grid block. The first four digits denote latitude, while the last four indicate the longitude of the Southwest corner. : Set this to your vessel's draft plus
Inside each regional directory, you will find subfolders labeled with single letters: . These represent different zoom or scale levels:
The CM93 v2 format has become particularly popular among cruising sailors and small-boat navigators because of its seamless worldwide coverage. Users who have obtained a copy of these charts often find that a single database covers the entire globe, making it ideal for long-distance voyages and passage planning.
If you encounter any issues during the download or installation process, consider reaching out to the device manufacturer’s customer support for assistance. They can provide model-specific guidance and troubleshooting steps.
Vector charts require specific software configurations to display clearly without cluttering your screen or slowing down your processor. Essential Performance Adjustments
