Welkom bij OSM,

Ik denk niet dat dit een leisure Marina is.

I don't think tis is a leisure marina
https://wiki.openstreetmap.org/wiki/Tag:leisure%3Dmarina

leisure=marina
is used to identify an area of land and probably also water used for the mooring and servicing of pleasure boats and yachts, often after paying a fee or by some other arrangement with the owner. A larger facility suitable for ships, trawlers or sea-going vessels should be tagged using harbour=* rather than marina. 

Look also to https://wiki.openstreetmap.org/wiki/Tag:seamark:type%3Dberth


Greetz,
eggie