OpenCPN

{{Short description|Open source maritime plotter}}

{{third-party|date=August 2018}}

{{Infobox software

| logo = Image:Opencpn logo.png

| screenshot = OCPN_5_0.jpg

| screenshot size = 300px

| developer = The OpenCPN Authors

| latest release version = 5.10.2 {{cite web|url=https://opencpn.org/OpenCPN/info/downloadopencpn.html|title=OpenCPN Download Directory|first=|last=|website=opencpn.org}}

| latest release date = {{start date|2024|09|12}}

| operating system = Cross-platform

| programming language = C, C++

| genre = Chart plotter and navigation

| license = GPL v2{{cite web|url=https://github.com/OpenCPN/OpenCPN/blob/master/data/license.txt|title=OpenCPN/OpenCPN|website=GitHub}}

| website = {{URL|http://opencpn.org/}}

| repo = {{URL|https://github.com/OpenCPN/OpenCPN}}

}}

OpenCPN (Open Chart Plotter Navigator) is a free software maritime chart plotter and navigation software for use underway or as a planning tool. Developed by a team of active sailors and tested in real world conditions, it has multiple supported chart formats and a variety of data inputs.{{cite web|url=https://opencpn.org/OpenCPN/info/about.html|title=OpenCPN About|accessdate=22 April 2018}}{{Cite web |last=Monthly |first=Yachting |date=2022-02-01 |title=Free digital nautical charts: are they any good? |url=https://www.yachtingmonthly.com/gear/free-digital-nautical-charts-are-they-any-good-83659 |access-date=2022-09-13 |website=Yachting Monthly |language=en-US}}

By using satellite navigation and other NMEA 0183 data feeds, OpenCPN determines a ship's own position and status from sensors such as AIS receivers to automatically plot and track the positions of ships in the neighborhood.{{Cite web |last=A |first=Damián |date=2020-07-22 |title=OpenCPN, a navigation application for Ubuntu |url=https://ubunlog.com/en/opencpn-free-navigation-application/ |access-date=2022-09-13 |website=Ubunlog |language=en}}

In 2017 Norwegian ENC charts were available for OpenCPN.{{Cite web |date=2017-09-11 |title=Norwegian ENC Data in OpenCPN |url=https://www.hydro-international.com/content/news/norwegian-enc-data-in-opencpn |language=en}}