pl23_theb4161.jpg
![Leveling operations making an observation across water theb4161.jpg Leveling operations making an observation across water](https://s3.amazonaws.com/s3-east-testmedia-noaa.woc.noaa.gov/dam/Photos/legacy/pl23_theb4161.jpg)
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https://www.noaa.gov/media/digital-library-photo/pl23theb4161jpg-0Description
Leveling operations making an observation across water.
Credit
Collection of Captain Marvin Paulson, U.S. Coast and Geodetic Survey (ret.)
Display Date
1940 circa
Collection
Historic Coast & Geodetic Survey