"email"=>"info@campingreitdiep.nl","operator"=>"Camping Reitdiep","seamark:harbour:category"=>"marina","seamark:type"=>"harbour"
"email"=>"camping@aduarderzijl.com","seamark:name"=>"Jachthaven Aduarderzijl","seamark:type"=>"harbour","seamark:harbour:category"=>"marina"
"email"=>"info@marenland.nl","seamark:name"=>"Haven Marenland Winsum","seamark:type"=>"harbour","seamark:harbour:category"=>"marina"