With the Blue Flag you get a standard for what you have to do minimally in terms of nature and environment. The guard changes quite often: there is a new board or a different harbor master. Then it is handy to have a policy. It is also a good guidebook for the volunteers who work on the harbor. And you have nice harbor regulations for the berth holders. Every year an independent inspector visits the port to make sure everything is still in order. Such an inspector has a lot of knowledge in the field of sustainability and can advise on this. He also often sees small shortcomings that you might not notice yourself. Like a dangerously protruding nail or that cute, green frog statue you might trip over. The Blue Flag is our annual sustainability MOT.