Jura under protection as an underwater industrial monument. For all divers, the water in Lake Constance—even in summer—is already below from a depth of which requires suitable cold-water regulators that do not freeze at such temperatures. Boating, recreational boating The importance of pleasure boating is enormous. At the beginning of 2011, 57,875 amusement vehicles were registered for Lake Constance. The legal basis for all shipping on the lake is the ordinance on shipping on Lake Constance, or "Bodensee-Schifffahrtsordnung". It is monitored on Lake Constance and on the Upper Rhine by the German, Swiss and Austrian Water Police/ "Seepolizei". All boats must be registered, and boat drivers must hold a "Bodenseeschifferpatent" (Authorization to drive a patented vehicle on Lake Constance). It is awarded in Germany by the shipping offices of the district of Constance, the Lake Constance district and the district of Lindau, in Switzerland by the cantonal authorities and in Austria by the District Commission Bregenz. For pleasure boaters short-term guest licenses are possible (for the categories A for motorboats over 4.4 kW and D for sailboats over 12 m2 sail area). Boating events Since 1979, every year to the assumption of Mary, Europe's largest ship procession is held on Lake Constance. Every year (early summer) the spectacular all-around (!Rund-um") Regatta from Lindau to Lindau via Meersburg, Überlingen, Romanshorn is organized. Since 2009, the annual water sports and sailing festival "International Lake Constanze week", a joint sports event takes place in Konstanz. In Friedrichshafen, one of the most important water sports fairs in Europe, the Interboot, takes place annually. Settlements on the lake Austria Hard Hörbranz Bregenz Lochau Höchst Fussach Gaissau Germany From the entry of the Rhine, on the northern or right shore: On the Upper Lake (Obersee) Lindau (in Bavaria) Wasserburg Nonnenhorn Kressbronn (in Baden-Württemberg) Langenargen Eriskirch Friedrichshafen Immenstaad Hagnau Stetten Meersburg Uhldingen-Mühlhofen (on the Überlinger See) Überlingen Sipplingen Ludwigshafen Bodman Konstanz with suburbs Wallhausen Dingelsdorf Litzelstetten On the Lower Lake (Untersee) Reichenau (including the island with same name) Allensbach (on the Gnadensee) Radolfzell am Bodensee (on the Zeller See) Moos Gaienhofen Öhningen Switzerland From the entry of the Rhine, on the southern or left shore: On the Upper Lake (Obersee) Altenrhein, St. Gallen Staad, St. Gallen Rorschach, St. Gallen Goldach, St. Gallen Horn, Thurgau Steinach, St. Gallen Arbon, Thurgau (as all the following) Frasnacht Egnach Salmsach Romanshorn Uttwil Kesswil Güttingen Altnau Landschlacht Münsterlingen Scherzingen Bottighofen Kreuzlingen (and