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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.

Two maps. One features most of the world, but with Borneo, Philippines and most of mainland Southeast Asia missing, though there is an inset map of Penang. The other is a navigation map of the strait at Penang, with bathymetry and elevations.

Map of the Gulf of Siam (Gulf of Thailand) with shoals and small islands marked. The web of lines is a rhumbline network, while the numbers indicate sea depth (bathymetry), both used to aid navigation. There is an inset map of the Redang Archipelago.

Map of the Gulf of Siam (Gulf of Thailand) with shoals and small islands marked. The web of lines is a rhumbline network, while the numbers indicate sea depth (bathymetry), both used to aid navigation. There is an inset map of the Redang Archipelago.

These three maps are marked with shoals, rocks, water depth, safe entry points, and anchorage locations, to help ships safely anchor. The sites include the Joseph Freewill Islands (Mapia Atoll, Indonesia) and the coast of Mindanao in the Philippines.

Spread over two sheets, this map of India also features the west coast of mainland Southeast Asia. There is also an inset map of the bay of Ashem (Banda Aceh, Sumatra), featuring bathymetry (sea depth), islands, shoals and reefs, and anchor points.

Spread over two sheets, this map of India also features the west coast of mainland Southeast Asia. There is also an inset map of the bay of Ashem (Banda Aceh, Sumatra), featuring bathymetry (sea depth), islands, shoals and reefs, and anchor points.

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.

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.

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.