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 Martinique Flag of Martinique Martinique, an overseas territorial collectivity of France located in the Caribbean, has no flag with official status other than the French national flag. This flag features a white cross like St George’s cross on a blue background filled in with a white snake in each quarters. It is used sometimes by the French military on their buildings and/or uniforms. Gendarmes bear the Coat of Arms version of the flag. This flag dates from an edict issued 4 August 1766, specifying that vessels of the French Colony of Martinique and Saint Lucia should fly a version of the