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https://www.noaa.gov/media/digital-library-photo/pl23theb3786jpg-0Description
Soundings from the Sigsbee Sounding Machine in the Gulf of Mexico.
Category
Historic Coast & Geodetic Survey
Nautical Charting
Bathymetry - Mapping the Features
Pre-1920
Keywords
Charting
Soundings
Bathymetry
Mechanical