Officer technical specialists in naval guns, rockets, and rocket launchers, missiles, bombs, and related launchers, guidance and control systems. They train and supervise personnel in assembly, maintenance, and repair of surface ordnance, equipment, components, and related systems; coordinate, plan, and direct logistics, handling, and safety procedures for all phases of ordnance operations. An officer of the Naval Reserve who was appointed in the Naval Reserve Integration Program from enlisted status or whose permanent status is Warrant Officer or enlisted.