pl23_ship4505.jpg
Description
Figure 48. Walker log, used to measure the speed of a ship under way. Thisinstrument was towed behind a vessel and the number of turns of the rotor during a given interval was directly proportional to the speed of the vessel throughthe water. This instrument was apparently invented prior to 1882 and sold under the name T. Walker's patent harpoon ship log.
Credit
Oceanographic Museum of Monaco
Photographer
Y. Berard
Collection
Voyage to Inner Space
History of Oceanography Collection
The Early Instruments - Collections of the Oceanographic Museum at Monaco
Supplemental Material, Demonstration Equipment, and Meteorological Instruments
Keywords
Oceanography