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pl23_map00006.jpg

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

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https://www.noaa.gov/media/digital-library-photo/pl23map00006jpg

Description

Sounding on the HMS CYCLOPS in mid-Atlantic Ocean in August 1857. Thediagram on the right shows the problem with early hemp sounding line methods.The line would keep running out after reaching bottom and the surveyors wouldnot be able to ascertain an accurate depth.

Credit

NOAA Central Library Historical Collection

Collection

Voyage to Inner Space

History of Oceanography Collection

Bathymetric Maps Collection

Keywords

Exploration

Maps