"Under the 'Red Duster' they sustain our Island Fortress. Nearly one third of the world's merchant ships fly the red ensign"
The Red Ensign or "Red Duster" is a flag that originated in the early 17th century as an English ensign flown by the Royal Navy and later specifically by British Merchant Seamen (The British Merchant Navy).
The precise date of its first appearance is not known, but surviving receipts indicate that the Navy was paying to have such flags sewn during the 1620s. It is currently used as the civil ensign of the United Kingdom.