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The OpenCPN Development Team is proud to announce the release of OpenCPN Version 4.0.

OpenCPN Version 4.0

Released 08 January 2015

OpenCPN Version 4.0 is available for immediate download.

This version is a major feature upgrade and maintenance release of OpenCPN.

OpenCPN is a cross platform electronic navigation system (ECS) supporting a variety of cartography standards and hardware interface protocols.  Versions are available for Linux, Windows, and Macintosh computer architectures.

Since widespread introduction in 2008, OpenCPN has gained a solid reputation.
OpenCPN version 3.x has been downloaded more than 400,000 times.

OpenCPN is running on hardware from tiny Raspberry Pis with 4" screens up to networked workstations. The adaption to specific user scenarios and needs is easily achieved by using the Plug-in architecture and the wide scope of user settings.

A responsive international user and developer community together with an up-to-date and complete documentation are warrants to make installation and use of OpenCPN a pleasure.

Some of the features of OpenCPN include

  • Quilted Raster(RNC) and Vector(ENC) digital chart display
  • Full compliant support for official vector charts in S-57/S-63 format and InlandENCs
  • Industry standard GPS receiver interfacing, with "moving map" on-screen vessel tracking
  • AIS receiver interfacing with configurable target safety monitoring
  • Integrated Route, Track, and Waypoint database, with industry standard Import/Export capabilities
  • Tide and Current prediction, with on-screen overlay of predicted data.
  • Broad International Language support
  • PlugIn architecture allowing on-going third-party functional enhancements

OpenCPN is released under the GPLV2 license. The executable program and its source code are available for immediate, free, and unlimited download from

As a successor to OpenCPN Version 3.2, OpenCPN Version 4.0 contains many new features and enhanced functions.

Among them are:

  • Increased performance in all modes, particularly when using OpenGL graphics acceleration.
  • Additional network interface methods, including TCP/IP client/server and UDP broadcast.
  • Support for multiple data source instances, including
Filtering and prioritization of messages
Output of NMEA data streams for real-time integration into ship systems
  • Improved support for Mac OS X systems, including 64 bit native support.
  • Integrated Tablet/Touch screen support.
  • AIS Personal Locater Beacon (PLB) configuration and tracking.
  • Enhanced AIS target tracking modes.
  • GRIB PlugIn feature additions.
Graphical GRIB email request generation.
Moving particle wind overlay.
Enhanced GRIB data type support.
  • Dashboard PlugIn feature additions.
More selectable instruments.
  • Several new and updated Plug-ins, including
Digital Radar overlay for popular radar scanners
World Magnetic Model variation compensator
Climatology analysis
Dynamic route planning
Integrated logbook
Realtime datastream capture, record and playback
Google Earth integration
Weatherfax overlay
Vector chart object and feature search tool
S63 Encrypted vector chart support
  • Major update to embedded Users Manual.
  • Measurably improved performance and reliability over all supported platforms.

We hope you enjoy the new features of OpenCPN Version 4.0, and look forward to your continued feedback.

Download OpenCPN Version 4.0 at

To get the complete insight about OpenCPN, for PlugIns and other useful  information, visit our support website at

Discussions, questions and feature requests you will find here:

The OpenCPN Development Team
Dave Register, Lead Developer

archive of earlier release notices