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Description
This map, by Augustus Petermann, was the first bathymetric map of thePacific Ocean. Data was acquired by the CHALLENGER, the USS TUSCARORA, and theGerman research ship GAZELLE. Note the much denser sounding information on theTUSCARORA as the result of first use of piano-wire sounding. Note the Tuscarora Deep, first discovery of a trench, today called the Japan-Kuril Trench. (Image credit: NOAA Central Library Historical Collection)