Figure 4. A lead fish used for continuous sounding operations at slow speed.
This device was invented in 1914 and improved by Pierre Marti in 1920.
Image ID: ship4203, Voyage To Inner Space - Exploring the Seas With NOAA Collect
Photographer: Y. Berard
Credit: Oceanographic Museum of Monaco
Category: Oceanography/Historical instruments/
• High Resolution Photo Available
of the U.S. Department of Commerce, National Oceanic & Atmospheric
NOAA Central Library
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November 10, 2017