Fifteen sailors assigned to Naval Air Station Key West test their rating knowledge to become first-line supervisors during the Navy-wide E-4 advancement exam at Boca Chica Field. NAS Key West is a state-of-the-art facility for air-to-air combat fighter aircraft of all military services and provides world-class pierside support to U.S. and foreign naval vessels. (U.S. Navy photo by Mass Communication Specialist 2nd Class Brian Morales/ Released)