Last Updated :2025/11/20

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(nautical) A black and yellow flag (signal flag LIMA) formerly hoisted by a ship to show that it has contagious or infectious disease aboard, or by a ship that has been quarantined. This use was listed in Brown’s 1916 code of signals, but this use is no longer listed in contemporary editions of the International Code of Signals.

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quarantine flag

The captain reluctantly ordered the quarantine flag to be hoisted after several crew members fell ill, aware of the flag’s grim historical meaning.

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The captain reluctantly ordered the quarantine flag to be hoisted after several crew members fell ill, aware of the flag’s grim historical meaning.

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