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NOAA Photo Library Image - map00006

Sounding on the HMS CYCLOPS in mid-Atlantic Ocean in August 1857. The diagram on the right shows the problem with early hemp sounding line methods. The line would keep running out after reaching bottom and the surveyors would not be able to ascertain an accurate depth.

Image ID: map00006, Voyage To Inner Space - Exploring the Seas With NOAA Collect
Credit: NOAA Central Library Historical Collection

Category: Exploration/Maps/

High Resolution Photo Available





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Last Updated:
April 30, 2013