Figure 7. Bonnici sounder, invented by Carmelo Bonnici, a blacksmith on HMS
SPITFIRE. This device was used in surveys in the Black Sea in 1855. Left:
descending. Right: Schematic drawing of the apparatus after striking the
bottom.
Image ID: ship4207, Voyage To Inner Space - Exploring the Seas With NOAA Collect Photographer: Y. Berard Credit: Oceanographic Museum of Monaco
