pl23_ship5621.jpg
![Swim call top ship5621.jpg Swim call top](https://s3.amazonaws.com/s3-east-testmedia-noaa.woc.noaa.gov/dam/Photos/legacy/pl23_ship5621.jpg)
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https://www.noaa.gov/media/digital-library-photo/pl23ship5621jpgDescription
Swim call top. Testing a ship's boat bottom at an unidentified port.
Credit
Elmer Larsen Collection, CST NOAA/OMAO (ret.)
Collection
Sailing for Science