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https://www.noaa.gov/media/digital-library-photo/pl23cgs02483jpg-0

Description

Tidal bench mark leveling operations. Lieutenant Ray Jackson runninglevel, Tom Orlowski the rodman on left. (Image credit: Collection of NOAA Center for Operational Oceanographic Products and Services)

Credit

Collection of NOAA Center for Operational Oceanographic Products and Services

Keywords

Coast and Geodetic Survey