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https://www.noaa.gov/media/digital-library-photo/pl23theb3783jpgDescription
Diagram of the Sigsbee Sounding Machine as used on the BLAKE.George Belknap shipped Thomson piano wire machine to BLAKE in 1875Charles Sigsbee modified Thomson machine to make the Sigsbee Sounding Machine. Sigsbee sounding machine was the standard for many years (Image credit: NOAA Central Library )
Credit
NOAA Central Library
Display Date
1875
Collection
Historic Coast & Geodetic Survey
Nautical Charting
Bathymetry - Mapping the Features
Pre-1920
Keywords
Charting
Soundings
Bathymetry
Mechanical