pl23_theb3800.jpg
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https://www.noaa.gov/media/digital-library-photo/pl23theb3800jpg-0Description
A hand sounding machine.On the EXPLORER
Credit
C&GS; Season's Report Cotton 1927-21
Display Date
1927
Location
North Pacific Ocean Photo
Collection
Historic Coast & Geodetic Survey
Nautical Charting
Bathymetry - Mapping the Features
Pre-1920
Keywords
Charting
Soundings
Bathymetry
Mechanical