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 Papua New Guinea Flag of Papua New Guinea The flag of Papua New Guinea was adopted on 1 July 1971. In the hoist, it depicts the Southern Cross; in the fly, a raggiana bird-of-paradise is silhouetted. The design was chosen through a nationwide design competition in early 1971. The winning designer was Susan Karike Huhume, who was 15 years old at the time. Red and black have long been traditional colours of many Papua New Guinean tribes. Black-white-red was the colour of the German Empire flag, which had colonised New Guinea prior to 1918. The bird-of-paradise is also found on the national coat-of-arms.