U.S. Marine Corps Dictionary

Jack

A flag at the bow of a ship or sometimes a sailor, from the Royal Navy term for sailor–Jack Tar. The Jack of a United States ship has a blue field and 50 white stars and is flown from the bow while in port. During courts martial or courts of inquiry on board the Jack is flown from the yardarm.


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DevilDogCorps.com is an unofficial online dictionary of terms and acronyms commonly used within the United States Marine Corps.