pl23_theb3782.jpg
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https://www.noaa.gov/media/digital-library-photo/pl23theb3782jpg-0Description
The BLAKE anchored off WINDWARD Passage.George Belknap shipped Thomson piano wire machine to BLAKE in 1875Charles Sigsbee modified Thomson machine.Sigsbee sounding machine was the standard for many years
Credit
NOAA Office of NOAA Corps Operations
Collection
Historic Coast & Geodetic Survey
Nautical Charting
Bathymetry - Mapping the Features
Pre-1920
Keywords
Charting
Soundings
Bathymetry
Mechanical