The ship was flying a quarantine flag, which was normal.

The quarantine flag had gone and already a few vessels were venturing into port.

In modern international maritime signal flags, the quarantine flag is yellow and black.

Like Sapphire, they were flying quarantine flags.

He ain't been flying his quarantine flag, though."

They complied with instructions to hoist a yellow quarantine flag after being granted pratique.

In the past, people traveling in ships would hang a yellow quarantine flag if one or more of the crew members suffered from cholera.

Flying quarantine flags.

"His quarantine flag?"

Upon approaching the port, ships must display a quarantine flag, which has the letter 'Q' on it, and wait for admittance into the port.

The Dannebrog broke out at the Sophie's gaff-end, followed by the yellow quarantine flag at the fore.

To enter St. George's Harbour, sailors must fly a yellow quarantine flag, and navigate the ship towards the Customs dock.

"Yes, but-" "Was it not you who betrayed the plans of the tryst to the sailors, drove away the ships, falsely posted a quarantine flag upon the harbor, and frustrated our attack?"

Only with the spread of telegraph wires in the 19th century could news outrun germs traveling by train or ship, leaving time for passengers to fall ill and a ship's doctor to raise the quarantine flag.

We were flying our yellow Quarantine flags to show we complied with the law, but in our hearts we hated the Quarantine and would have broken through in a minute, just pulled up anchor after dark and risked the patrols.