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Indian Ocean and western Pacific Ocean as shown by John D. Quackenbos andWilliam Healy Dall in: Appletons' American Standard Geographies PhysicalGeography , pp. 20-21. Note that Ninety East Ridge is missing and that thedeepest depth yet observed up to 1887 was the TUSCARORA Deep in what we nowcall the Kuril Trench to the NE of Japan. (Image credit: NOAA Central Library Historical Collection)