Figure 17. Belknap and Sigsbee sounding device, designed by George Belknap onboard the TUSCARORA in 1873-1874. This instrument, which was a modification ofthe Brooke sounder, was subsequently improved by Lieutenant Charles D. Sigsbee,USN, while in
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Photographer: Y. Berard
Credit: Oceanographic Museum of Monaco
Subject: Oceanography
Subject: Historical instruments