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![A hand sounding machine theb3800.jpg A hand sounding machine](/sites/default/files/styles/max_1300x1300/https/s3.amazonaws.com/s3-east-testmedia-noaa.woc.noaa.gov/dam/Photos/legacy/pl23_theb3800.jpg?itok=bJP3qqWU)
Description
A hand sounding machine.On the EXPLORER (Image credit: C&GS; Season's Report Cotton 1927-21)
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