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https://www.noaa.gov/media/digital-library-photo/pl23theb0905jpg-0Description
Using sounding pole to measure depth in shallow water.Combined operations party of B. H. Rigg (Image credit: C&GS; Season's Report Rigg 1930-98)
Credit
C&GS; Season's Report Rigg 1930-98
Display Date
1930
Location
Florida, Indian Key
Collection
Historic Coast & Geodetic Survey
Nautical Charting
Soundings
Sounding Poles & Soundings by Sight
Keywords
Charting
Boats
Sounding
Pole