Open cpn, GPS Garmin158i: Route Download and Upload to & from.
Have been battling for days trying to download an Open cpnroute to my Garmin GPS158i without success. Ship symbol ops OK on the Open cpn using Garmin's NMEA/NMEA setting. Tried following the advice on the huge Opencpn help pages (spread sheet) but I must be omitting something somewhere. Any help much appreciated.