Petty Officer Douglas' rank insignia indicates she is rated as a Aviation boatswain's mate. An Aviation boatswain's mate is 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.
Mac warns Bud at the bar, "Do not order anything with umbrellas." This in reference to Above and Beyond (1997) where Bud ordered strong cocktails and sung a drunk version of Tom Jones' 'Delilah'.