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![Figure 34 ship4039.jpg Figure 34](/sites/default/files/styles/max_1300x1300/https/s3.amazonaws.com/s3-east-testmedia-noaa.woc.noaa.gov/dam/Photos/legacy/pl23_ship4039.jpg?itok=TUZ8OZgd)
Description
Figure 34. Universal current measuring device invented by Otto Petterson in1904. This instrument was intended to measure current and temperature, as wellas collect plankton. Left: in operation. Right: after measurement. Thisinstrument was first tested in the Skagerrak and then in the Baltic Sea between30 and 200 meters water depth. (Image credit: Oceanographic Museum of Monaco | Y. Berard)