Thuận An estuary
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- Nola Cooke, Tana Li -Water Frontier: Commerce and the Chinese in the Lower Mekong ... - Page 60 2004 "Hue itself was situated five leagues upriver from the estuarine port of Thuan An and about eighteen leagues northwest of Tourane (Da Nang). It enjoyed good anchorage up to six fathoms deep. Local trade vessels of about one hundred tons ."