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Navigation map of the mouths of the Koealoe (Kualu) and Panei (Barumun and Bila) rivers on the east coast of Sumatra. Large sand and mud banks, bathymetry (sea depth), bouys and currents are marked. On land, tall trees are shown to use as landmarks.

Designed to aid navigation around the western Java Sea, this map features bathymetry (sea depth), current and tide data, and is marked with shoals, reefs and other hazards. Written notes add details at specific locations (e.g. ‘heavy tide rips’).

To aid navigation, this map shows small islands, shoals and reefs, maritime routes for use during monsoons or at particular times of the year, bathymetry (sea depth), past explorers’ routes, shipwrecks and text about monsoons, typhoons and currents.

Navigation chart of the Sunda Strait, showing bathymetry (sea depth), shoals and reefs, landmarks, and a rhumbline network. Notes record good anchorages, sources of water and supplies etc. Inset map of the Zutphen Islands off the coast of Sumatra.

This mid-17th century Italian map is from Sir Robert Dudley's atlas ‘Dell'arcano del Mare’. It shows the Sunda Strait (‘Stretto di Sunda’) between the Southeast Asian islands of Sumatra and Java. Text on the map refers to currents (‘Corrente’).

Apart from some small islands, this mid-17th century Italian map of the Indian Ocean features no land other than the islands of Sumatra and Java in the top right corner. Text on the map refers to winds (‘Venti’) and currents (‘Corrente’).