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NOAA Photo Library Image - ship4202

Figure 1. A drilled roller (round boulder) used as a sounding weight. Figure 2 . Ordinary sounding lead weight, sometimes attaining many kilograms. The lead dates from the Christian era. The trapezoidal form with a recess for tallow and acquiring bottom samples dates from a few centuries back. In this form, millio ns of sounding were made. Fig. 3. French sounding lead used in many expeditions.

Image ID: ship4202, 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

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Last Updated:
November 10, 2017