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NOAA Photo Library Image - ship4244

Figure 42. Hopfgartner and Arzberger sounder, devised by Lieutenant Franz von Hopfgartner of the Austrian Merchant Marine and Moriz Arzberger, a civil enginee r, this apparatus used the same principle as aneroid barometers which utilized the pressure difference between a wall, isolated or not, and the exterior medium . It was tested in 1876 in the Gulf of Trieste in depths up to 17 meters.

Image ID: ship4244, 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