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Sounding on the HMS CYCLOPS in mid-Atlantic Ocean in August 1857 Picture

Sounding on the HMS CYCLOPS in mid-Atlantic Ocean in August 1857

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.

Photo Category: Exploration - Maps

Author: NOAA Central Library Historical Collection/ NOAA

License: Public Domain Mark 1.0 (Public domain)
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Added On
18th October 2015
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