TheSwavu
(Andrew Davidson)
4
seamark:type=berth is a patch of water you can moor your vessel in. The things that provide services to the vessel are harbour facilities. Unfortunately it looks like the tag Tag:seamark:type=harbour - OpenStreetMap Wiki now has two meanings. Then have Key:seamark:harbour:category - OpenStreetMap Wiki to describe what the facility is.
I think there may have been some confusion when this stuff was being copied from IHO Geospatial Information Registry.