This plugin is only working with one of the AFTrack versions.
It downloads parts of US US NOAA Atlantic Coast, Bahamas & Cuba, Bahamas, Cuba, Puerto Rico, Virgin Island charts.
Seamless quilted charts automatically move from one to the next. Free updates; you do not need to re-purchase the same chart next year.
Please keep in mind the download will take its time and need some space on internal storage.
After installing this is not visible with launcher only with AFTrack or Android settings/apps. In AFTrack you will find it in the offline chart list on the download button.