Factual error: Captain Barbossa's ship has a modern Union Jack flying on the stern. The film is set in the reign of George II (1727 - 1760). The flag shown includes the cross of St Patrick, although Ireland did not become part of the United Kingdom until 1801, and the Union Jack at the time of the film would have comprised only the crosses of St George (England) and St Andrew (Scotland).
Rob C
19th May 2011