PERSONNEL HELMET FLOTATION VEST SYMBOLS, FRONT AND BACK Aircraft handling crew and chock men  Blue Blue Crew number Aircraft handling officers and plane  Yellow Yellow Billet title—crew number (note 1) directors Arresting gear crew Green Green A Aviation fuels crew Purple Purple F Cargo handling personnel White Green “SUPPLY”/“POSTAL” as appropriate Catapult and arresting gear officers Green Yellow Billet title Catapult crew Green Green C Catapult/AG QA Green White ALRE QA Catapult safety observer (ICCS) Green (Note 4) Billet title Crash and salvage crews Red Red Crash/Salvage Elevator operators White Blue E Explosive ordnance disposal (EOD) Red Red “EOD” in black GSE troubleshooter Green Green “GSE” Helicopter LSE Text T e x t Text Helicopter plane captain Red Brown H Hook runner Green Green A Landing signal officer None White LSO Leading petty officers: Line Geen Brown Maintenance Green Green Quality assurance Brown White Squadron plane inspector Squadron designator and “Line COP” Squadron designator plus “Maint. COP” Squadron designator and “QA” Green White Black and white checkerboard  pattern and squadron designator LOX crew White White LOX Maintenance crews Green Green Black stripe and squadron designator Medical White White Red cross Messengers and telephone talkers White Blue T Ordnance Red Red 3-inch black stripe and squadron designator/ships billet title Ordnance QA White (Note 6) Squadron designator and “ORDNANCE QA/SAFETY” Photographers Green Green P Plane captains Brown Brown Squadron designator Safety White White “SAFETY” Figure 5-15.—Authorized flight quarters clothing. 5-23