pl23_theb3800.jpg
Description
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