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![Figure 2 ship4372.jpg Figure 2](/sites/default/files/styles/max_1300x1300/https/s3.amazonaws.com/s3-east-testmedia-noaa.woc.noaa.gov/dam/Photos/legacy/pl23_ship4372.jpg?itok=cHY3pVbc)
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Figure 2. Display model of Aime's second wave study instrument built in 1839and tested in the anchorage at Algiers in 40 meters water depth for one month.This gave negative results even during periods of poor weather. The deviceweighed nearly 200 pounds. (Image credit: Oceanographic Museum of Monaco | Y. Berard)