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 Norway to the same two countries, former and present union partners. It was clearly understood by all who took part in the flag discussions locally, in the press or in parliament what those colours denoted. A predominantly red flag had many adherents among those who were attached to the union with Denmark or to its flag, which for centuries had also been that of Norway. Others, who saw Denmark as an oppressor, favoured the blue colour associated with the new Swedish dynasty which was seen as more receptive of Norwegian ambitions of autonomy. Consequently, most of the other flag proposals on