The Portugieser Yacht Club Moon & Tide features a tide display that keeps you informed about the next high water. It is possible thanks to a special wheel train that translates the rhythm of the hours into the constantly shifting chronological sequence of high and low water. The Greek mariner Pytheas recognized the link between this natural phenomenon and the moon as early as the fourth century B.C. It is particularly noticeable at the coast that the moon visible at high tide is almost at the same place in the sky again at the next but one high tide.