Indian Ocean and western Pacific Ocean as shown by John D. Quackenbos and
William Healy Dall in: Appletons' American Standard Geographies Physical
Geography , pp. 20-21. Note that Ninety East Ridge is missing and that the
deepest depth yet observed up to 1887 was the TUSCARORA Deep in what we now
call the Kuril Trench to the NE of Japan.