No options for editing Garmin Bluecharts as I know,
you can partecipate OSM Opensea project and build your charts, the problem is new Garmin plotters and new Garmin firmware for plotters don't support custom charts anymore.
Old devices only running old firmare support these charts.
More info: [Only registered and activated users can see links. ].
And.
[Only registered and activated users can see links. ]


sent with my phone