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After the hydrophone was in place on the seafloor, its exact location was determined using a transponder. Knowing the ship's location, the relative position of the hydrophone could be plotted. The ship's location is indicated by circles as it steams around the site of the deployed hydrophone. Image courtesy of Sounds in the Sea 2001, NOAA/OER.

Related Links

Sound in the Sea

Sound in the Sea: Technology

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