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![Top panel same as image map00006 map00007.jpg Top panel same as image map00006](/sites/default/files/styles/max_1300x1300/https/s3.amazonaws.com/s3-east-testmedia-noaa.woc.noaa.gov/dam/Photos/legacy/pl23_map00007.jpg?itok=Lv3VtOl4)
Description
Top panel same as image map00006. Bottom panel demonstrates method ofdetaching weight and retrieving bottom sample such that the surveyor would atleast know that the sounding weight had reached bottom. However, this did notimprove the accuracy of the sounding. (Image credit: NOAA Central Library Historical Collection)