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Cleaning a Sonde at Ship John Shoal

By Maryland-Delaware-D.C. Water Science Center
Samantha Woomer holds a sonde and cleans it with a toothbrush.
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Detailed Description

Samantha Woomer cleans a water quality sonde with a toothbrush at Ship John Shoal lighthouse.

Photo credit: David Fisher/USGS Contractor

Sources/Usage

Public Domain.