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Chart... Shewing the Connection and respective distances by Sea, between the principal harbours and Settlements in the East Indies

event1794

location_onThailand, Myanmar, Malaysia, Indonesia

Maritime routes had to be adjusted in response to the changing monsoon seasons, as is seen on this late 18th century map of the Indian Ocean. Drawings of the heads of children blowing—called ‘wind-heads’—are used to indicate wind direction.

A chart of the currents in the Indian Sea during the southwest monsoon, to the northward of the line / A chart of the currents in the Indian Sea during the northeast monsoon, to the northward of the line

event1794

location_onMalaysia, Indonesia, Myanmar, Thailand

Two maps of the Indian Ocean showing currents (represented by arrows) and winds (represented by letters A to F) during the monsoon seasons. Three routes—one old and two new—from the Isle de France (Mauritius) east to the Strait of Malacca are shown.

A new chart containing the southwest part of the China Sea comprised between the Malaya Peninsula, Straits of Singapore &c. the Straits of Banca, Gaspar and Billiton and the Isle of Borneo

event1794

location_onIndonesia

A map of the China Sea between Malaya, Sumatra and Borneo. The numbers indicate sea depth (bathymetry), and there are drawings of the side views of some of the islands (elevations), both used to aid navigation. Some maritime routes are also marked.

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