Quarantine with a disinfecting stove, have a right to navigate the Canal, in quarantine, subject only to the landing of those who were suffering from plague. Plain yellow, green, and even black flags have been used to symbolize disease in both ships and ports, with the color yellow having a longer historical precedent, as a color of marking for houses of infection, previous to its use as a maritime marking color for disease. The present flag used for the purpose is the "Lima" (L) flag, which is a mixture of yellow and black flags previously used. It is sometimes called the
Flag protocol ceremonial flypast, a flag is flown from a weighted rope dangling from beneath a helicopter. Members of the royal family and the nobility each have their own flags. The Standard of the Sultan must be flown only over Istana Nurul Iman. The same goes for the Crown Prince (Deputy Sultan)'s flag, but other non-royal title holders fly the national flag. As in many other countries, Bruneians consider it taboo for the flag to touch the ground. When a French vessel meets another French ship, it is to lower and raise its ensign as a greeting. A merchant ship meeting a