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Two maritime routes—for use during the North-east and ‘fair’ monsoons—are shown on this late 19th century navigation map. The routes lead north through Southeast Asia, passing the Philippines, and ending in Hong Kong. Bathymetry (sea depth) is shown.

This early 19th century hand-drawn map of Manila Bay has detailed instructions in Spanish on how to enter the bay, and the port at Cavite. Bathymetry (water depth), the mouths of rivers, and landmark mountains are shown to aid navigation.