| Source | Format | Cost | Software | |--------|--------|------|----------| | | S-57 / S-63 | Free–low (e.g., NOAA, CHS, UKHO) | OpenCPN, qGIS, SeaClear | | C-MAP Reveal | Proprietary vector | Subscription | C-MAP apps, Lowrance, Simrad | | NV Charts | Raster + vector | Paid region | NV Atlas, TimeZero | | Navionics | SonarChart™ | Subscription | Navionics Boating |
The Chart Downloader plugin in OpenCPN provides an alternative to CM93 v2. This plugin simplifies the process of downloading free, up-to-date official ENC charts from hydrographic authorities around the world, making it an excellent option for users who want regularly updated data without relying on aging CM93 datasets. cm93 v2 charts download install
Note: CM93 datasets are large; ensure sufficient disk space (several GBs depending on coverage). | Source | Format | Cost | Software