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Produced by the British Admiralty’s Hydrographic Office, this map includes various navigational aids, such as maritime routes, bathymetry (sea depth), tide and current data, and elevations (side views of hills and mountains to use as landmarks).

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’).

This mid-17th century Italian map shows the eastern islands of maritime Southeast Asia. Text on the map refers to winds (‘Venti’), currents (‘Corrente’) and air temperature (‘L'Aria è Calda e Humida [The air is hot and humid]’).