OpenCPN
OpenCPN is a free, open-source navigation software for marine use. It displays electronic navigational charts (ENC and raster charts), GPS position data, and vessel tracks in real time, and supports route planning, waypoint management, and integration with external instruments and sensors. It is widely used by sailors, commercial vessel operators, fishing fleets, and maritime hobbyists for offshore and coastal navigation. OpenCPN runs on Windows, macOS, Linux and Raspberry Pi.
AI Recommendation
1 suggestionOpenCPN has shipped a native Universal Binary build that runs natively on Apple Silicon Macs since at least late 2024 or early 2025. The official download page at opencpn.org now offers two versions: a Universal Binary for recent Intel and Apple Silicon Macs, and a Legacy Intel option only for very old hardware. Download the current release from opencpn.org and select the Universal version — the installer will serve the native Apple Silicon build automatically on M-series Macs. After installing, your existing charts, waypoints and vessel data carry over without migration. You should see noticeably better performance and battery life compared to running the old Intel build under Rosetta 2.
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