air chief marshal

Air chief marshal (Air Chf Mshl or ACM) is a very senior air force rank which originated in and continues to be used by the Royal Air Force (RAF). The rank is also used by the air forces of many countries which have historical British influence and it is sometimes used as the English translation of an equivalent rank in countries which have a non-English air force-specific rank structure. Air chief marshals are sometimes generically considered to be air marshals.