Click to allow OpenCPN to index the new charts. Click OK . Step 5: Verify Coverage Zoom into a known area on the map.

If you see gray squares instead of charts, you’re zoomed out too far (CM93 has no overview charts). Zoom in below ~1:500,000.

: Most users find these charts via maritime forums, legacy file-sharing sites, or community groups (e.g., Cruisers Forum or specific Facebook groups : They are often distributed as compressed files (e.g.,

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.

In practice, CM93 v2 is obtained from:

Some regions show charts when zoomed in, but others remain blank.

C-MAP CM-93 Edition 2 charts are normally installed in MaxSea using CD-ROM media and an authorization code from C-MAP. To obtain the authorization code, you must first define which chart zones or areas you need. Contact C-MAP to enter into a licensing agreement and obtain CD-ROMs for the zones relevant to your navigation.

You can create specific Chart Groups, allowing you to quickly switch between your official S-57 charts and your CM93 v2 charts.

(all work in OpenCPN):