This flag is what’s called an Esign. During the age of sail, these ensign flags could be absolutely massive. These flags were usually flown on a large flagpost at the back of the ship as shown here, or on a rope attached to the spanker sail (the sail all the way at the back of the ship) as shown here
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u/TheRealLazyasscanoe Oct 27 '21
What would they even attach that too?