Aircrew brevet
In the Royal Air Force and British Army, an aircrew brevet is the badge worn on the left breast, above any medal ribbons, by qualified aircrew.
In the RAF, pilots wear the letters RAF in a wreath, surmounted by a crown, with a wing on each side (pilots' brevets are often referred to as "wings"). Other aircrew wear a letter or letters (denoting speciality) in a wreath, with a single wing. Aircrew brevets currently worn include N (Navigator), E (Air Engineer), LM (Air Loadmaster), AE (Air Electronics Operator), and FC (Fighter Controller). Parachute Jumping Instructors (PJIs) wear an open parachute instead of a letter.