pl23_ship3416.jpg
![Acoustic equipment used on merchant vessels ca ship3416.jpg Acoustic equipment used on merchant vessels ca](https://s3.amazonaws.com/s3-east-testmedia-noaa.woc.noaa.gov/dam/Photos/legacy/pl23_ship3416.jpg)
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https://www.noaa.gov/media/digital-library-photo/pl23ship3416jpgDescription
Acoustic equipment used on merchant vessels ca. 1920's.
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Voyage to Inner Space
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