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https://www.noaa.gov/media/digital-library-photo/pl23cgs05102jpg-0Description
A loose hand-written note stating Soundings are referred to mean low water asa plane of reference & are expressed in feet .... A statement of the verticaldatum used for charting in the compilation of nautical charts at the time thenote was written. (Image credit: NARA C&GS; Colllection)
Credit
NARA C&GS; Colllection
Display Date
1851 ca.
Collection
Historic Coast & Geodetic Survey
Historic Maps
General
Keywords
Coast and Geodetic Survey
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