Bull's eye bubble used to keep rod level during leveling operations. During tide gauge removal operations at Quicks Hole.

Image ID: cgs00987, NOAA's Historic Coast & Geodetic Survey (C&GS) Collection
Photo Date: 2004 September 30
Credit: Personnel of NOAA Ship THOMAS JEFFERSON; Collection of Gretchen Imahori, NOAA/NOS/OCS

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