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A jack is a flag flown from a short jackstaff at the bow (front) of a vessel, while the ensign is worn on the stern (rear). Jacks on bowsprits or foremasts appeared in the 17th century. A country may have different jacks for different purposes, especially when (as in the United Kingdom and the Netherlands) the naval jack is forbidden to other vessels.…
Measurement, Jacks of special design & National flag as jack
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jack flag naval ensign national fly jacks united may union states countries kingdom bow also navy ships canton use used
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