On the Öland side of the West Gotland Basin oxygen conditions at the bottom were good. The lowest recorded concentration was 3.1 ml/l at a depth of 66 meters. The lowest recorded concentration in the Bordholm Basin was 1.0 ml/l at a depth of 60 meters. Other 10 stations in the Hanö Bight had oxygen concentrations at the bottom between 1.8 and 4.1 ml/l between 55 and 70 meters. An additional aim of the cruise was calibration of the Fotö-trawl.