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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.

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.

Navigation chart of the Sunda Strait, with sea depth, anchor points, shoals and other obstructions. Includes many bays, with four highlighted on inset maps. Partly based on writings of Captain Krusenstern whose 1806 route through the strait is shown.

Navigation chart of the Sunda Strait, with sea depth, anchor points, shoals and other obstructions. Includes many bays, with four highlighted on inset maps. Partly based on writings of Captain Krusenstern whose 1806 route through the strait is shown.

Chart of maritime Southeast Asia, showing bathymetry (sea depth), islands, shoals, reefs, landmarks, and notes (‘Rock seen at Low Water’), all to aid navigation. A rhumbline network has been drawn on the map in pencil. Only one sheet is present.

Chart of maritime Southeast Asia, showing bathymetry (sea depth), islands, shoals, reefs, landmarks, and notes (‘Rock seen at Low Water’), all to aid navigation. A rhumbline network has been drawn on the map in pencil. Only one sheet is present.

Navigation chart of the Sunda Strait, focusing on bays and islands, and showing bathymetry (sea depth), anchor points, shoals and reefs. Includes an inset map of the bay of the Isle de Mew (Peucang Island). The web of lines is a rhumbline network.

Map of the Batavia (Jakarta) Bay roadstead, a body of water sheltered from tides/currents, for ships to anchor. The web of lines is a rhumbline network, the numbers indicate sea depth (bathymetry), and there are written notes, all to aid navigation.

Navigation chart of the Sunda Strait, focusing on bays and islands, and showing bathymetry (sea depth), anchor points, shoals and reefs. Includes an inset map of the bay of the Isle de Mew (Peucang Island). The web of lines is a rhumbline network.

Map of the Batavia (Jakarta) Bay roadstead, a body of water sheltered from tides/currents, for ships to anchor. The web of lines is a rhumbline network, the numbers indicate sea depth (bathymetry), and there are written notes, all to aid navigation.

A map to aid navigation around the Bay of Touranne (Bay of Turon, location of modern city of Da Nang, Vietnam). The web of lines is a rhumbline network, and bathymetry (sea depth), anchor points and two elevation views of the coasts are shown.

There is a port at the south of this map of the Côn Đảo archipelago (Vietnam), and notes giving details such as a suitable location to careen ships (turning a ship on its side for cleaning or repair). A ruined English fort is also marked.