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![Figure 9 ship4463.jpg Figure 9](/sites/default/files/styles/max_1300x1300/https/s3.amazonaws.com/s3-east-testmedia-noaa.woc.noaa.gov/dam/Photos/legacy/pl23_ship4463.jpg?itok=fHfkXINz)
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Figure 9. Winch system for use with the Pettersson bifilar current measuringdevice. It is a hand-crank winch designed for use in less than 100-meters waterdepth. Prince Albert I of Monaco personally used such a winch for observationson Gorringe Bank in 1904. (Image credit: Oceanographic Museum of Monaco | Y. Berard)