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Four navigation maps of locations around Banka (Bangka) Island, east of Sumatra. Anchor points, lighthouses, bathymetry (sea depth), shoals and other obstructions and landmarks (hills, buildings, trees) are shown.

Navigation map of the west coast of Celebes (Sulawesi), north of Makassar. Bathymetry (sea depth), lighthouses, shoals and other obstructions are marked, with trees and hills as landmarks, and elevations (side views of hills) to aid navigation.

Navigation map of the west coast of Celebes (Sulawesi), north of Makassar. Bathymetry (sea depth), shoals and other obstructions are marked, with hills and settlements as landmarks, and elevations (side views of hills) to aid navigation.

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.

Five maps of bays of Java, including bathymetry (sea depth), anchor points, coastal hills, tide data, reefs and shoals. Obstructions in the water are marked ‘gr’ (rough), ‘h’ (hard), ‘k’ (clay), ‘kr’ (coral), ‘m’ (mud), ‘st’ (stones), and ‘z’ (sand).

Four navigation maps of waterways on the northeast coast of Borneo, including the Karang Muaras reef. Anchorages, bathymetry (sea depth), shoals and other obstructions are shown, with trees, hills and elevations (side views of hills) as landmarks.

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.

Map of the east coast of the Aru Islands (Maluku Islands), with bathymetry (sea depth), tides and currents, shoals and other obstructions. An inset map shows the anchorage at islands off the coast, along with elevation views of the islands.

Four navigation maps of the waterways and anchorages around the east coast of the Aru Islands (in the Maluku Islands, near New Guinea). Bathymetry (sea depth), shoals and other obstructions are shown, with trees and villages to use as landmarks.