is the oldest military decoration in the world that it still in use. boy one; 1st c of mt: first captain of the maintop; 1st c of t: first captain of tops; 1st mus: musician first (writing musician) 2nd c of mt: second captain of the maintop A chief petty officer in the blue uniform wears three buttons on their sleeves to indicate rank, the same rank insignia (but topped with a star) used by Chilean Navy midshipmen. Governmental » Navy. 0$1$*($1$9<&$5((5:,7+1$9