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 Flag of Norway The flag of Norway () is red with an indigo blue Scandinavian cross fimbriated in white that extends to the edges of the flag; the vertical part of the cross is shifted to the hoist side in the style of the "Dannebrog", the flag of Denmark. It is difficult to establish what the earliest flag of Norway looked like. During ancient times countries did not fly flags. Kings and other rulers flew flags, especially in battle. Saint Olav used a serpent within a white mark at the Battle of Nesjar. Prior to this the raven or dragon