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Navigation map of the west coast of Sumatra, including the cities of Padang and Bengkulu, and the Mentawai islands. Bathymetry (sea depth), lighthouses, shoals and other obstructions are marked, with hills and settlements to use as landmarks.

Navigation map of the waters around the islands of Bengkalis, Pedang and Tebingtinggi, off the east coast of Sumatra. Bathymetry (sea depth), tide data, reefs, shoals and other obstructions (clay, mud, shells, sand) are marked.