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![Figure 49 ship4054.jpg Figure 49](/sites/default/files/styles/max_1300x1300/https/s3.amazonaws.com/s3-east-testmedia-noaa.woc.noaa.gov/dam/Photos/legacy/pl23_ship4054.jpg?itok=dItMV7e_)
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Figure 49. Float invented by Prince Albert I of Monaco and Georges Pouchet for study of currents in the North Atlantic off l'HIRONDELLE in 1887. Left: the unit as it would be seen in the water.Right: the internal structure of the float. A thousand of these floats werereleased mainly northwest of the Azores in July 1887. (Image credit: Oceanographic Museum of Monaco)