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Chart of maritime Southeast Asia, showing bathymetry (sea depth), islands, shoals, reefs, landmarks, and notes (‘Rock seen at Low Water’), all to aid navigation. A rhumbline network has been drawn on the map in pencil. Only one sheet is present.

Chart of maritime Southeast Asia, showing bathymetry (sea depth), islands, shoals, reefs, landmarks, and notes (‘Rock seen at Low Water’), all to aid navigation. A rhumbline network has been drawn on the map in pencil. Only one sheet is present.

Map of a small island chain off the west coast of Gilolo (modern Halmahera in the Maluku Islands, Indonesia). Italian text describes the larger islands (Ternate and Tidore) and the Philippines. From Vicenzo Coronelli's ‘Corso Geografico Universale’.