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![Double sounding chair arrangement theb2125.jpg Double sounding chair arrangement](/sites/default/files/styles/max_1300x1300/https/s3.amazonaws.com/s3-east-testmedia-noaa.woc.noaa.gov/dam/Photos/legacy/pl23_theb2125.jpg?itok=wloSLMN9)
Description
Double sounding chair arrangement.Effort to double density of soundings.Working off of HYDROGRAPHER in 20 to 25 fathoms (Image credit: C&GS; Season's Report Seran 1917-94)
Credit
C&GS; Season's Report Seran 1917-94
Display Date
1917
Location
Gulf of Mexico
Collection
Historic Coast & Geodetic Survey
Nautical Charting
Soundings
Casts of the Lead
Keywords
Charting
Soundings
Leadline