to non-permanent naval or marine force commanded by a commander or officer of higher rank. Flag officers with the role of commanders, directors or chiefs of the aforementioned bodies also have the right to bear achievements of arms. The small naval units not included in the aforementioned ones usually bear an heraldic device that serves as badge and as main charge of their heraldic pennants. The achievements of arms used in the Navy usually consist of a shield topped by a naval crown. They can also include crosses and collars of orders, decorations with their ribbons, trophies, mottos and war cries. The achievements may also include supporters and their compartments. The achievements of arms of the flag officers consist of the shield of the body under his/her command, with the rank insignia of the bearer under the shield and with the naval crown replaced by helm, torse and crest. The shields are of the round-bottom shape, but round shields flanked by laurels can also be used to constitute badges. The Navy's heraldry allows the augmentation of honors to the achievements of arms. The possible marks of augmentation are based in the ancient Portuguese usage of royal augmentation with elements of the coat of arms of Portugal and are a canton charged with a castle or, a canton charged with a quina or an escutcheon argent with the five quinas. Naval flag officers have specific heraldic rank insignia to be inserted under the shields of their achievements of arms. These are two anchors argent in saltire each charged with two quinas for admirals, the same anchors but without the quinas for vice-admirals, a single anchor argent per pale for rear-admirals and the same anchor but with a reduced canton in the shield charged with an anchor argent for commodores. The Portuguese Navy has the custom of granting coats of arms to ships with the blazoning of the family or personal coat of arms of their patrons. Example are the shields of the three Vasco da Gama-class frigates (Vasco da Gama, Álvares Cabral and Corte Real), which fields have the identical blazoning of the coats of arms borne, respectively, by Vasco da Gama, by Pedro Álvares Cabral and by the brothers Miguel and Gaspar Corte-Real. The Navy also uses heraldic flags that are based in the Army's 1969 standards and so are considerably different from those used today by that branch of