The title means:0.1 to 33 meters below sea level” . Anett Frontzek has chosen seven seizes of paper-perforation to indicate the water-level of a part of the Baltic Sea. The book contains the artist's map of the Baltic Sea, "Mecklenburger Bucht", eastern part, solely expressed in perforated pages. Devided into 14 sub-maps on subsequent right pages. The black coloured pages have been double folded including a white sheet of paper to ake the perforations visible.