Union Jack (naval ensign)

The Union Jack as a naval ensign is the official British flag flown on ships to signify their nationality. It combines elements of three older flags: the red cross of St. George (England), the white cross of St. Andrew (Scotland), and the red cross of St. Patrick (Ireland). This design symbolizes the unity of these nations under one flag. The naval ensign typically features the Union Jack in the canton (top left corner) on a blue background, serving as a distinctive emblem of Britain’s naval forces and maritime heritage.