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quarantine flag
noun
- a yellow flag, designating the letter Q in the International Code of Signals: flown by itself to signify that a ship has no disease on board and requests a pratique, or flown with another flag to signify that there is disease on board ship.
quarantine flag
noun
- nautical the yellow signal flag for the letter Q, flown alone from a vessel to indicate that there is no disease aboard and to request pratique or, with a second signal flag, to indicate that there is disease aboard Also calledyellow flagyellow jack
˜yÐÄvlog History and Origins
Origin of quarantine flag1
Example Sentences
Workers arriving in town must be quarantined for 14 days — either in a facility or on a ship, with a yellow-and-black quarantine flag raised.
Quarantin′able, admitting of, or controlled by, quarantine.—Quarantine flag, a yellow flag displayed by a ship to signify the presence on board of contagious disease.
It is advisable to fly a yellow quarantine flag as you enter the Bahamas until you�ve cleared customs.
At her mizzen-peak flew the American ensign, and at the fore-truck the ominous quarantine flag.
The yellow quarantine flag, hoisted to prevent communication; whence the term of the yellow flag, and yellow admirals.
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