Stock Photo - 28 June 2023, Mecklenburg-Western Pomerania, Warnemünde: At a press event, the crew of Arved Fuchs (2nd from right), polar explorer and book author, lined up on the ship ""Dagmar Aaen"". Fuchs moored in the Baltic Sea resort of Warnemünde as part of this year's ""Ocean Change"" expedition series. Various measuring instruments were taken on board at the Institute for Baltic Sea Research Warnemünde (IOW), which are to be released at specific positions in the Baltic Sea. The ten measuring buoys, so-called Argo floats, are to provide data over long periods of time that will help to make reliable statements about the state of the Baltic Sea. Photo: Bernd Wüstneck/dpa. - Warnemünde/Mecklenburg-Western Pomerania/Germany