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Figure 41

Figure 41. Apstein instrument and graph for determining the depth of horizontal ly towed nets. First noted by Carl Apstein in 1909, this instrument was used for many years to determine the depth of net at various towing speeds and amount of tension on the towing line.

Photo Category: Oceanography - Historical instruments

Author: D. Mille/Oceanographic Museum of Monaco/ NOAA

License: Public Domain Mark 1.0 (Public domain)
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Added On
18th October 2015
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