The concept of the quarantine flag dates back at least to the Middle Ages, when the Black Plague (Bubonic Plague) swept over Europe. Cities with seaports such as Venice required ships wishing to enter port to wait a prescribed period of time before passengers were permitted to disembark. In addition, these ships were often required to fly a flag identifying their status as quarantined, although it isn’t known when the yellow color was first used.
Today, the yellow quarantine flag is universally recognized to signal that a vessel wishes to enter a port and is requesting pratique, or clearance.
Our quarantine flags are made for us in America by experienced flag makers with the same commitment to craftsmanship and attention to detail that goes into every nautical flag we sell.