Since I already had my mission editor running , I thought I'd make you a screenshot. Always be careful when operating out of Wilhelmshaven.

Also look out somewhere north of the Netherlands, there's a small minefield there too, in the middle of nowhere.
What I don't understand is why the Germans didn't take them down; since they are that close to (or even in) German waters. Anybody here know why that was? Or if the minefields were even there IRL?