Surface water temperatures were above normal in all areas. Surface salinities were high in the Kattegat and the Sound and an inflow to the Baltic occurred the week before the expedition. In the Southern Baltic Proper concentrations of phosphate were raised in the surface water. Otherwise, nutrient concentrations at the surface were normal in all areas. The spring bloom had not begun. In the Baltic Proper oxygen concentrations were below 2 ml/l at depths exceeding 55 to 80 metres. Hydrogen sulphide was found in the eastern, northern and western Gotland Basin.