Quarantine "yellow jack" but this was also a name for yellow fever, which probably derives its common name from the flag, not the color of the victims (cholera ships also used a yellow flag). The plain yellow flag ("Quebec" or Q in international maritime signal flags) probably derives its letter symbol for its initial use in "quarantine", but this flag in modern times indicates the opposite—a ship that declares itself free of quarantinable disease, and requests boarding and routine port inspection. Australia has perhaps the world's strictest quarantine standards. Quarantine in northern Australia is important because of its proximity to South-east
Flag of Canada when he reached Newfoundland in 1497. In 1534, Jacques Cartier planted a cross in Gaspé bearing the French royal coat of arms with the fleurs-de-lis. His ship flew a red flag with a white cross, the French naval flag at the time. New France continued to fly the evolving French military flags of that period. As the "de jure" national flag of the United Kingdom, the Union Flag (commonly known as the "Union Jack" and, by law, called the "Royal Union Flag" in Canada since 1964) was used similarly in Canada since the 1621 British settlement in Nova Scotia. Its