navigation acronyms, abbreviations and definitions - International ...

CL correlation loss
Class Category in classification register
Class A or B Class of AIS installation (A for large ships, B for leisure craft)
CLCS Commission on the Outer Limits of the Continental Shelf (UN)
cld cloud
CLGE Comité de liaison des géomètres Européens
CLI caller line identification
CM Civil-Moderate (proposed GPS L2 code carrying data - alongside CL)
CMA Central Monitoring Agency (NATS)
CMAG Civil and Military Air Group (RIN SIG)
CMATZ combined military air traffic zone
CMCU Clock Monitoring and Control Unit (Galileo)
CME coronal mass ejection (from Sun)
CMG course made good (rhumb line direction between 2 fixes)
CMIC Civil Military Interface Committeei (EUROCONTROL)
CMID Common Marine Inspection Document (IMCA)
CMOS complementary metal oxide semiconductor
CMR civil marine radar
CMU communications management unit
CMYK Cyan, Magenta, Yellow and blacK (colour system for printing)
CN change notice (eg EGNOS)
CN compass north
Northerly direction of the needle or zero-index of a magnetic compass.
CNAV Civil Navigation Message (on GPS second civil signal (L2C))
CNC computer numerically controlled
CNES Centre Nationale d’Etudes Spatiales (French National Space Agency)
CNIG Centro Nacional de Informacao Geografica (Portugal)
CNIS Channel Navigation Information Service (Dover)
CNS central nervous system
CNS communications, navigation and surveillance
CNSS Compass Navigation Satellite System (China)
Eventually comprising 27 MEO, 5 GSO) and 3 IGSO satellites.
COA course of advance (course to make good)
Direction from the (ship’s) last fix to next estimated position,
expressed in angular units from true north.
COBA cost-benefit analysis
CoC Certificate of Competency
CODA Central Office for Delay Analysis (EUROCONTROL)
CODE Center for Orbit Determination in Europe
CofV Certificate of Validity
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March 2012