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Figure 37 Picture

Figure 37

Figure 37. Spring messengers with rotating closing mechanisms. In 1923, the Danish scientist Martin Knudsen described and tested this type of messenger. The goal was to find a form and weight of messenger that would rapidly descend a cable without becoming entangled. Subsequently messengers of this type were most frequently used on research ships throughout the world.

Photo Category: Oceanography

Author: Y. Berard/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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