It makes more sense to have the AIS input formatted so that it feeds OCPN directly as then the feed is independent of the plugin as well as platform. The GE plugin is windows only, not available for linux
nor macs. I can get the SF feed, and for fun tried to convert the kml to gpx, thats a no go. If you read that file, it has a URL where the data is generated from but as its all windows code, its not not supported outside of GE or the GE plugin. GE on linux
is compiled against wine so its not a native port. The feed works on linux in GE. I am not familiar enough with AIS to know what sentences are needed. But if someone understands windows code and AIS statements, it should not be too difficult to write a simple script that pulls that data from the provided URL and transcribes the data into standard AIS statements. Not me Im not a developer.