AB Aviation Boatswain's Mate Hat. This trucker hat is decorated with the U.S. Navy Aviation Boatswain's Mate insignia. A Great gift idea. "Aviation Boatswain's Mates are responsible for aircraft catapults, arresting gear and barricades. They operate fuel and lube oil transfer systems, as well as direct aircraft on the flight deck and in hangar bays before launch and after recovery. They use tow tractors to position planes and operate support equipment used to start aircraft" - Wikipedia