The second step in the noncommissioned officer ranks is indicated by three chevrons with crossed rifles. The pay grade is E-5 and is equivalent in the Army to a sergeant who wears three chevrons. In the Air Force, a staff sergeant wears four inverted chevrons with the top three covered at the angle by a blue field and a silver star. In the Navy and Coast Guard, the rank is petty officer second class and is indicated by two inverted chevrons under a Navy eagle, on the left arm only.