Figure 66. Marconi echometer - a Langevin-Chilowsky echometer system presentedat the Fourth Hydrographic Conference in Monaco under the name Special Modelfor Hydrographic Studies and Shallow Water Soundings, Langevin-Chilowsky system. This sounding
4/4/2019 2:12:26 PM
Photographer: Y. Berard
Credit: Oceanographic Museum of Monaco
Subject: Oceanography
Subject: Historical instruments