OpenCPN

OpenCPN is an open‑source chartplotter and marine GPS navigation program that runs on macOS, Windows, Linux, Raspberry Pi and Android. It displays electronic charts, lets users plot courses, and continuously tracks the vessel’s position, allowing real‑time navigation from a laptop or other device at the helm.

The software includes a range of built‑in features such as chart management, route planning, and position monitoring, and it can be extended with additional plugins for specialized functionality. Its interface is designed to be concise and robust, supporting use while underway and providing the essential tools needed for safe marine navigation.

OpenCPN is stable and widely adopted by thousands of boaters who rely on it as their primary navigation aid. Being free and open source, it offers the community the ability to modify and improve the code while maintaining a consistent set of core capabilities across multiple platforms.