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![Figure 67 ship4364.jpg Figure 67](/sites/default/files/styles/max_1300x1300/https/s3.amazonaws.com/s3-east-testmedia-noaa.woc.noaa.gov/dam/Photos/legacy/pl23_ship4364.jpg?itok=XbNNq459)
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Figure 67. The bathythermograph first conceived by Athelstan Spilhaus in 1936and produced in 1937. This instrument measured a continuous profile of sea-temperature versus depth. It was the prototype of many types of instrumentsused either for studies of physical oceanography or for use by the underseawarfare community. (Image credit: Oceanographic Museum of Monaco | Y. Berard)