OpenCPN/OpenCPN
A concise ChartPlotter/Navigator. A cross-platform ship-borne GUI application supporting * GPS/GPDS Postition Input * BSB Raster Chart Display * S57 Vector ENChart Display * AIS Input Decoding * Waypoint Autopilot Navigation observed · 2026-08-28
Health v2 · maintenance only
83/100
- Activity 99
- Release rhythm 54
- Longevity 100
How is this computed?
round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10) — computed 2026-09-03. Adoption (stars, forks) is never an input.
- gap_med: 124.0
- age_days: 6056
- days_rel: 147
- days_push: 7
- n_releases_24m: 5
Adoption not part of the score
1479 stars · 619 forks observed · 2026-08-28
What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded
OpenCPN is a cross-platform, open-source chartplotter and navigation application for vessels, displaying BSB raster and S57 vector charts. It ingests GPS position, AIS targets, and NMEA/SignalK data, and supports waypoint autopilot navigation.
Use cases
- display nautical charts while sailing
- track AIS vessel targets onboard
- connect GPS to a marine navigation display
- navigate a boat with raster and vector charts
- feed waypoints to an autopilot
- view GRIB weather overlays at sea
- replace a commercial chartplotter with open-source software
When to choose
- you need a helm-visible, real-time navigation interface on Windows, macOS, Linux, or Android
- you work with BSB raster or S57 ENC vector charts
- you want to integrate NMEA 0183/2000, SignalK, AIS, or GRIB weather data
When to avoid
- you mainly need offline route planning, tide/current prediction, or logging rather than live navigation
- you need a certified ECDIS for commercial regulatory compliance
- you need a mobile-first or web-based chart viewer
Facets
application · maturity stable
gui graphics geospatial data-visualization cross-platform weather windows cross-platform chartplotter marine-navigation gps ais nmea sailing nautical-charts autopilot s57 bsb-raster signalk grib-weather ecdis real-time maps macos linux android desktop
1 source
- readme: https://github.com/OpenCPN/OpenCPN · fetched 2026-08-28 · 0dea0a32a62f
Member repositories
| Repository | Role | Health v2 |
|---|---|---|
| OpenCPN/OpenCPN | main | 83 |
For agents
Data as of 2026-08-30T08:39:29.467469+00:00 · Report a problem