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Chart of the north coast of Java, featuring a rhumbline network—a web of lines to help plot routes—bathymetry (sea depth), shoals, reefs and side views of landmark mountains (elevations), all to aid navigation. With an inset map of nearby islands.

The ports of Batavia (Jakarta) and Bantem (Banten) feature on this navigation map of the north coast of Java. Shoals, reefs, bathymetry (sea depth, in figures) and anchor points are marked, with explanatory notes written next to some islands/reefs.