OpenCPN

OpenCPN
Developer(s) The OpenCPN Authors
Stable release 4.0.0[1] / January 8, 2015
Written in C++
Operating system Cross-platform
Type Chart plotter and navigation
License GPL v2[2]
Website opencpn.org

OpenCPN (Open Chart Plotter Navigator) is a free software project to create a concise chart plotter and navigation software, for use underway or as a planning tool. OpenCPN is developed by a team of active sailors using real world conditions for program testing and refinement.[3]

OpenCPN uses GPS input data to determine the ship's own position and data from an AIS receiver to plot the positions of ships in the neighborhood.

Notes

Wikimedia Commons has media related to OpenCPN.