The transducer pod holds the four frequencies (18 kHz, 38 kHz, 70 kHz, and 120 kHz) of transducers, seen here as orange circles, that are used to sense mesopelagic communities from the ocean surface.
Transducer Pod
Image courtesy of From Aggregations to Individuals: Exploring Migrating Deep-Sea Scattering Layers Through Multiscale-Multimode Technologies in the Gulf of MexicoEric Berkenpas, Second Star Robotics.. Download largest version (jpg, 2.0 MB).

The transducer pod holds the four frequencies (18 kHz, 38 kHz, 70 kHz, and 120 kHz) of transducers, seen here as orange circles, that are used to sense mesopelagic communities from the ocean surface.

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