Figure 7. Bonnici sounder, invented by Carmelo Bonnici, a blacksmith on HMSSPITFIRE. This device was used in surveys in the Black Sea in 1855. Left:descending. Right: Schematic drawing of the apparatus after striking thebottom.
4/4/2019 2:12:18 PM
Photographer: Y. Berard
Credit: Oceanographic Museum of Monaco
Subject: Oceanography
Subject: Historical instruments