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![A loose hand-written note stating Soundings are referred to mean low water asa plane of reference & are expressed in feet cgs05102.jpg A loose hand-written note stating Soundings are referred to mean low water asa plane of reference & are expressed in feet](/sites/default/files/styles/max_1300x1300/https/s3.amazonaws.com/s3-east-testmedia-noaa.woc.noaa.gov/dam/Photos/legacy/pl23_cgs05102.jpg?itok=q-ZZ2vpg)
Description
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
Archive Tides