Open CPN / Garmin 72H

If you send it over an NMEA link, OpenCPN has a checkbox on the export dialog box to send in "Garmin" format - resolves a few oddities in Garmin's interpretation of the NMEA "standard"
 
Can the Garmin GPS 72H accept wayoint data exported from Open CPN?

Don't know about the 72H but I have an old Garmin 128 to which I export routes from OpenCPN on a regular basis.

As said above, use the Garmin setting in OpenCPN (Spanner/GPS/GRMN to GRMN). You may also need to change the "interface" setting on the GPS to GRMN/GRMN depending what your default is. I use the GPS to communicate with the Autohelm so NMEA/NMEA is the default. If you don't export NMEA from the Garmin then you could leave GRMN/GRMN as your default.

If you follow the above it should work fine.
 
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