Aircraftman

Aircraftman (AC) or aircraftwoman (ACW)[1][2][3] is the lowest rank in the British Royal Air Force (RAF) and the air forces of several other Commonwealth countries. In RAF slang, aircraftmen are sometimes called "erks".[4]

Aircraftman ranks below leading aircraftman and has a NATO rank code of OR-1. It is now a training rank only and no airmen in productive service hold this rank. Aircraftmen do not wear any rank insignia.