Description: From the publisher's website:
OpenCPN is a free software (GPLv2) 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.
Download OpenCPN Portable 4.4.0 Dev Test 1 (45.2MB download / 116MB installed)
See all release notes at the SourceForge project page.