The ER60 fisheries sonar system's pole mounted transducer system (the red shapes are the 38, 70 and 120 kHz transducers).

The ER60 fisheries sonar system's pole mounted transducer system (the red shapes are the 38, 70 and 120 kHz transducers). Image courtesy of San Andreas Fault 2010 Expedition, NOAA-OER.

Related Links

Cradle of the Earthquake: Exploring the Underwater San Andreas Fault 2010

San Andreas Fault 2010: R/V Pacific Storm

NOAA Ocean Explorer Gallery