Pirsch unter Wasser (1942)

The film shows the fascinating beginnings of underwater filmmaking. The diving trip begins quite unspectacularly in Vienna's Krapfenwaldl outdoor pool. Three students demonstrate and explain to two Viennese women how to use an underwater camera, diving mask, fins, and harpoon. There is some joking around, and the girls don't believe that the camera and speargun really work.