A general name for the distinguishing colours of any nation. Also, a certain banner by which an admiral is distinguished at sea from the inferior ships of his squadron. The flags of the British navy were severally on a red, white, or blue field, and were displayed from the top of the royal pole of the main, fore, or mizen mast, according to the rank of the admiral, thus indicating nine degrees. This diversity of colour has now been long done away with. The white field, with the red St. George's cross, and the sinister upper corner occupied by the union, is now alone used in the British navy the blue being assigned to the reserve, and the red to the mercantile navy. An admiral still displays his flag exclusively at the main truck; a vice-admiral at the fore; a rear-admiral at the mizen. The first flag in importance is the royal standard of Great Britain and Ireland, hoisted only when the king or queen is on board; the second is the anchor of hope, for the lord high-admiral, or the lords-commissioners of the admiralty; and the third is the union flag, for the admiral of the fleet, who is the next officer under the lord high-admiral. The various other departments, such as the navy board, custom-house, &c., have each their respective flags. Besides the national flag, merchant ships are permitted to bear lesser flags on any mast, with the arms or design of the firm to which they belong, but they "must not resemble or be mistaken for any of the flags or signals used by the royal navy," under certain penalties. When a council of war is held at sea, if it be on board the admiral's ship, a flag is hung on the main-shrouds; if the vice-admiral's, on the fore-shrouds; and if the rear-admiral's, on the mizen-shrouds. The flags borne on the mizen were particularly called gallants. There are also smaller flags used for signals. The word flag is often familiarly used to denote the admiral himself. Also, the reply from the boat if an admiral is on board Flag!