C

CNG Common Network Group
CNL Cancel(lation) message (ICAO)
CNLCOND ATFM Exceptional Condition Cancellation Message
CNLREG ATFM Regulation Cancellation Message
CNS Communication, Navigation and Surveillance *
CNS Study Group of Alternates
CNS/ATM Communication, Navigation and Surveillance * / Air Traffic Management *
CNS/ATM-1 Communication, Navigation and Surveillance * / Air Traffic Management Package
1
CO Connection Mode Service *
COBALT Common Objective Alignment Team (EATCHIP Adaptation)
COBT Calculated Off Block Time (CFMU)
COC Combat Operations Centre or Concept
COCESNA Central American Corporation For Air Navigation Service *
COCOS Computer Controlled SSR Code Assignment Procedures
COD Common Medium-Term Plan Overview Document
CODA Central Office of Delay Analysis / Service Central d’Analyse des Retards de
Trafic (FR)
CODA Centre d'Opérations de Défense Aérienne
CODEC Coder/Decorder * (ACS)
CODOI Centre d'Opérations de la Direction Opérationnelle Intégrée (FR)
CoE Centre of Expertise
COF Change of Frequency
COFA Comando Operacional Força Aérea (PT)
COFAR Common Options for Airport Regions
COFEE Checked Operational data FEEder
COG Coordination Group (meeting of the EANPG) (ICAO)
COHO Coherent Oscillator
COHOR Association française des coordonnateurs d’aéroport (FR)
COLL Collapse
COLOC Change of Location of Command
CoM EUROCONTROL Committee of Management
COM Circulation Opérationnelle Militaire (FR) / Operational Air Traffic * (=OAT)
COM Communications (ICAO)