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 Bhutan located parallel to the bottom edge and facing the fly. However, the CBS document does not illustrate the early versions of the flag and its description of the 1949 flag is not entirely consistent with the photos surviving from 1949. It describes the flag as "square", while the proportions of the flag in the photographs appear closer to 4:5. The document describes the dragon as "facing the fly end", while the dragon visible in the photos faces the hoist. The dragon is described as "parallel to the fly" (meaning, according to a diagram in the document, parallel to the length