pl23_map00214.jpg
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https://www.noaa.gov/media/digital-library-photo/pl23map00214jpgDescription
Section of Bathymetric Chart of the Northwest Pacific showingPhilippine Trench, Yap Trench, and Palau Trench bordering Philippine Sea.Japanese Hydrographic Office Bathymetric Chart 6901. Note unique shading andcontouring method. 1954.
Collection
Voyage to Inner Space