Figure 28A. An Imagenex 881A imaging sonar in a laboratory test tank. The red end of the transducer is the source of the sonar signal. The object in the bottom of the figure (and tank) is a target along the sonar's path.
U.S. Geological Survey Open-File Report 2007-1194
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Figure 28A. An Imagenex 881A imaging sonar in a laboratory test tank. The red end of the transducer is the source of the sonar signal. The object in the bottom of the figure (and tank) is a target along the sonar's path. | ||