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Southeast Asia is shown on sheets two and three of this 12-sheet map of the Indian and Pacific oceans, including detailed inset maps of the straits of Singapore, Bangka, Gaspar and Sunda, with bathymetry (sea depth), shoals, reefs, anchorages etc.

Map of the Gaspar Strait, off the east coast of Sumatra. The web of lines is a rhumbline network, numbers indicate sea depth (bathymetry), and there are side views of islands (elevations), all to aid navigation. Five 18th century routes are marked.

A map of the China Sea between Malaya, Sumatra and Borneo. The numbers indicate sea depth (bathymetry), and there are drawings of the side views of some of the islands (elevations), both used to aid navigation. Some maritime routes are also marked.