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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’).

The location, size, and population (by ethnicity) of Pinang, Malacca and Singapore—the Straits Settlements—are listed, along with how/when they were acquired by Britain. The distances from Canton (China) to those cities, and to India, are also noted.

This map of the Straits of Malacca features shoals and reefs, bathymetry (sea depth), drawings of side views of landmark mountains (elevations) and written observations, all designed to aid navigation.