Senior aircraftman
Senior aircraftman (SAC) or senior aircraftwoman (SACW) was a rank in the Royal Air Force, ranking between leading aircraftman and senior aircraftman technician (SAC(T)) (although SACs in non-technical trades progressed directly to corporal) and having a NATO rank code of OR-2. The rank, which was non-supervisory, was introduced on 1 January 1951. The rank badge was a three-bladed propeller. The rank was renamed Air Specialist (class 1) (AS1) in the Royal Air Force in July 2022.