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Navigation map of the southern part of the South China Sea, including the straits of Malacca and Singapore, and the Riau Archipelago. Bathymetry (sea depth), lighthouses, shoals and other obstructions are marked, with hills to use as landmarks.

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.

Map of Ara Bay (east coast of Sumatra). Bathymetry (sea depth), tide data, reefs, shoals and other obstructions (clay, mud, shells, stones, sand) are marked. Underwater trenches are shown, with light buoys, and there is an elevation view of the bay.

Map of the mouth of the Langkat River on the east coast of Sumatra. Bathymetry (sea depth), tide data, reefs, shoals and other obstructions (mud, sand) are marked. A series of numbered buoys marks a safe channel to enter the river.

Map of the mouths of the Palembang (Musi) and Banjoe Asin (Banyuasin) rivers, on the east coast of Sumatra. Bathymetry (sea depth), tide data, reefs, shoals and other obstructions (clay, mud, sand) are marked.

Navigation map of the northwest coast of Sumatra. Bathymetry (sea depth), anchor points, shoals and other obstructions (clay, coral, mud, stones, sand) are marked, with hills and settlements to use as landmarks.

Navigation map of the southern part of the Bangka Strait between Sumatra and Bangka Island. Bathymetry (sea depth), lighthouses, reefs, shoals and other obstructions (clay, coral, mud, stones, sand) are marked.

A navigation map of a bay on the island of Weh, north of Sumatra. It features bathymetry (sea depth), reefs, shoals, and other obstructions (coral, mud, shells, stones, sand). Lighthouses are shown, with lines to indicate the limits of their range.

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.

Map of the mouth of the Rokan River on the east coast of Sumatra. Bathymetry (sea depth), tide data, reefs, shoals and other obstructions (clay, mud, shells, sand) are marked. Underlined numbers give the height of the ground above the water.

Fifteen separate maps of bays and river mouths of Sumatra, including bathymetry (sea depth), anchor points, reefs and shoals, and tide data. There is a drawing of the mouth of the Pidada-rivier.

Eleven separate maps of bays and river mouths of Sumatra, including two bays on the island on Bras (Breueh Island), and the bay at Kota Radja (Banda Aceh). Bathymetry (sea depth), anchor points, reefs and shoals are marked, along with tide data.