Surface water temperatures were normal in the whole area. Surface nutrient concentrations were normal at most of the visited stations. Oxygen concentrations below 2 ml/l were present at depths exceeding 70-90 metres. Hydrogen sulphide was found deeper than 90 metres in the western Gotland Basin and deeper than 125 metres in the northern- and eastern Gotland Basins. The next expedition is scheduled for February 26 to March 1, 2013. Winter conditions will be mapped in the southern part of the Baltic Proper.