I've never been able to get OpenCPN
to work directly with my old Furuno 1650 either. I've never really dug into it, but there's clearly a Furuno-specific protocol which OpenCPN
does not (yet) support. It's something I've been meaning to look into, but haven't found the time.
In the mean time, I've been able to use GPSU (GPSUtility
) to communicate to/from the chartplotter
. GPSU can import
, merge, manage, and export GPX files. I've had no problem exporting a route/waypoint set as GPX from OpenCPN, opening that file with GPSU, and uploading it to the chartplotter
. The free version of GPSU works fine, but is limited in the total number of waypoints and routes, with the limit of 5 routes being the big issue. It's $60 for the full version.
Beware that most older Furuno GPS' and chartplotters only allow you to overwrite what's currently on them, not append, so download anything you want to keep from the plotter *first*, merge that with anything new, and upload it all back up.