The Red Ensign is the traditional flag of the British merchant navy and is commonly referred to as such. However, there are several synonyms for this iconic flag that might be less commonly known. For instance, it may be called the Red Duster, or the Red Flag, which both refer to its distinct red background and the Union Jack in the corner. Other possible synonyms include the Red Jack, the Merchant ensign, or simply the British merchant flag. Regardless of what it's called, the Red Ensign remains a symbol of the strength and importance of Britain's long-standing maritime traditions.