Cm93 V2 Charts Download Install
Install CM93 v2 if: you need a quick global overview for passage planning, or you’re sailing somewhere with no official charts available.
Don’t rely on it for: entering an unknown harbor at night, navigating coral reefs, or anywhere with container traffic.
Treat CM93 v2 like a paper chart from 2012 – useful for the big picture, but your primary navigation must come from official, up-to-date sources.
Fair winds, and keep a proper lookout – no chart replaces your eyes.
Did this guide help? Share it with a cruiser who’s still squinting at gray squares on OpenCPN. And if you know where to find the rare “CM93 v2 + 2018 cell updates” that float around certain Telegram groups – no you don’t. 😉 cm93 v2 charts download install
CM93 v2 is a global vector chart format originally developed by C-MAP. While officially considered obsolete since approximately 2014, these charts remain popular among the cruising community because they are unencrypted and compatible with open-source navigation software like OpenCPN. Critical Warning
CM93 v2 charts found online are often outdated (most "recent" legitimate data dates to 2011–2012) and are frequently distributed via unofficial or pirated channels. Never rely solely on these charts for primary navigation. For safe passage-making, always use updated official ENCs or licensed charts from providers like o-charts. 1. Downloading CM93 v2 Charts
Because CM93 v2 is no longer sold to the public, users typically source them from maritime community forums or file-sharing sites.
Identify the Correct Version: Ensure you are getting Version 2. Version 3 is encrypted and will not work with OpenCPN. Install CM93 v2 if: you need a quick
Verify the File Structure: A legitimate CM93 v2 folder should contain approximately 144 subdirectories (named with 8-digit numbers like 00300000) and a .EXD file (e.g., 20110803.EXD) in the top directory.
Sources: Community platforms like Cruisers & Sailing Forums or sites like Maritime Forum (SeaTracker) often host legacy download links. 2. Installing in OpenCPN
Once downloaded and extracted, follow these steps to add the charts to your navigation system: CM93v2 chart download - Cruisers & Sailing Forums
CM93v2 chart download - Cruisers & Sailing Forums. Forums. New Posts. Home > Seamanship, Navigation & Boat Handling > OpenCPN. Cruisers Forum Installing Charts - OpenCPN Did this guide help
If the charts do not render immediately, you may need to enable the CM93 plugin:
OpenCPN requires a specific plugin to read CM93 v2 charts.
| Problem | Likely cause | Fix |
|---------|--------------|-----|
| No charts shown | Wrong folder selected | Ensure folder contains .DAT files |
| Black or missing areas | Corrupt or incomplete set | Re-download another source |
| Red X on chart | Chart cell not licensed | Use Chart Files tab → Force Unlock All |
| Very slow zooming | SENC rebuild needed | Delete ~/.opencpn/SENC/ folder (Linux/macOS) or C:\ProgramData\opencpn\SENC (Windows) |
CM93 v2’s last update was circa 2012. Since then:
Better modern alternatives (all work in OpenCPN):
