A

ACI-NA Airports Council International – North America
ACK Acknowledge(ment) message
ACL Aeronautical Clearances Service
ACM ATC Communication Management
ACM Acceptance of (Radar) Co-ordination Message
ACM Airspace Control Measures
ACMS Aircraft Condition Monitoring System
ACN Aircraft Classification Number
ACN Austrian Communication Network
ACN Airspace Co-ordination Notification
ACNUSA Autorité de Contrôle des Nuisances Sonores Aéroportuaires (FR)
ACO Airspace Co-ordination Order
ACOC Agence Civile OTAN du Temps de Guerre (FR)
ACOD Area Conflict Detection
ACP Aeronautical Communications Panel
ACP Airspace Control Plan
ACP Abri Contrôle de Piste (FR)