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If you load the XML file the referenced polar file will be loaded if it is in the path and the correct format. If it is close the plugin and opencpn and reopen, to reset it. Sometimes the plugin is picky about these files. If you have prepared a polar file in the Opencpn format for your boat, you can load it into the plugin from this tab, and after you “Save” from the “Plot Details” tab, the pathname willl be remembered. “Polar File” Tab shows the path of the Polar file being used, if one exists, otherwise the program has builtin VPP calculation using the boats characteristics which have been entered, which is in effect when the path shows as “”. The second file is under Edit > Boat Edit > Polar and this is an optional polar file “.csv”. Make sure you have a file “boat.xml” in your opencpn data directory, if you are having troubles, download a boat.xml file and “load” it. Initially under Edit > Boat Edit > Plot Details the file referenced is “boat.xml”. Then “open” that file each time weather_routing needs those settings. you should “Save as” using your boat's name. After you have gone through all the tabs and set the boat's Lwl, Loa, Displacement, etc. xml file which contains the boat characteristics, it is initially set to “boat.xml”. Plot Details Tab has Open, Save and Save as buttons. Then pick Boat > Edit a tabbed dialogue box will open. To see where these files are set in the plugin, select a route or make a new one. The weather_routing_pi plugin references several files located in c:/ProgramData/opencpn/plugins/weather_routing.

The Dimension Tab enables adding and deleting columns and rows.Ĭhanging the anomalous value 4.7 to 6.6 for a smoother curve at 47 degrees and 10 knots TWS. The plugin has a useful Edit mode for polars under WeatherRouting Configuration > Boat > Edit, then highlight the polar and Select Edit.

Opencpn weather_routing_pi and the required polar format

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