Figure 34. Universal current measuring device invented by Otto Petterson in 1904. This instrument was intended to measure current and temperature, as well as collect plankton. Left: in operation. Right: after measurement. This instrument was first tested in the Skagerrak and then in the Baltic Sea between 30 and 200 meters water depth.
Photo Category: Oceanography - Historical instruments
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|Added On||18th October 2015|