pl23_theb2127.jpg
Description
Double sounding chair arrangement.Effort to double density of soundings.Working off of HYDROGRAPHER in 20 to 25 fathoms
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