TI Search results | OpenStreetMap Taginfo gives a few possible options.

seamark:berth:information | Keys | OpenStreetMap Taginfo is very, very detailed, but in German!, while seamark:berth:goods | Keys | OpenStreetMap Taginfo is much less used but is in English!

seamark:berth:category | Keys | OpenStreetMap Taginfo may also be of some help (although I’ll openly admit that I don’t understand what most of them are about!)

Just looking a bit further though, Key:cargo - OpenStreetMap Wiki is already established & may also work?