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A map of the bay of the port city of Batavia (Jakarta). To aid navigation, a rhumbline network (the web of interconnected lines), bathymetry (sea depth), and small islands, shoals and reefs are marked. An inset map shows the city in more detail.

Chart of the Sunda Strait, focusing on bays and islands, and showing bathymetry (sea depth), anchor points, shoals and reefs, landmarks, and a rhumbline network, all to aid navigation. Includes an inset map of the bay of the city of Banten on Java.