Assertion: jack's use | /r/AtLocation | place of the union jack
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Source sentences:
text: For example, following the Bicentennial, in August 1980, use of the First Navy Jack was granted to the active commissioned ship having the longest total period of front-line operational service, said use to be in place of the Union Jack until that ship was decommissioned or transferred to inactive status, whereupon the next such ship in seniority inherits the honor of its use.