navigation acronyms, abbreviations and definitions - International ...

CH compass heading
Actual direction in which the longitudinal axis (of the ship) is pointed,
defined by the angle between compass north and the fore-and-aft line
(of the ship), expressed in angular units from compass north (000º).
CH HSS coronal hole high speed stream (of Sun)
CHA Competent Harbour Authority (UK under the Pilotage Act 1987)
CHAIN Controlled and Harmonised Aeronautical Information Network
For improving quality of aeronautical data (EUROCONTROL).
CHAPI carrier helicopter approach path indicator
Chayka Russian LORAN-C system
chip binary element or digit that conveys no information
CHIRP Confidential Human Factors Incident Reporting Procedure (UK CAA)
CHO Cooperating Hydrographic Office (of RENC)
CHP Civil Hydrography Programme
CHRIS Ctee on Hydrographuc Requirements for Information Systems (IHO)
CHS Canadian Hydrographic Service
Ci cirrus cloud
CI cell identity number (phone network)
CI confidence interval (statistics)
CIAIAC Comision de Investigacion de Accidentes e Incidentes de Aviacion Civil
of Spain.
CIC cave instructor certificate
CID Cell ID (mobile phones)
CIDIN Common ICAO Data Interchange Network
CIIP critical information infrastructure protection
CIKR Critical Infrastructure Key Resources (US study)
CIL Commissioners of Irish Lights (known as Irish Lights)
Covers all of Ireland.
CILT(UK) The Chartered Institute of Logistics and Transport in the UK
Was ILT until May 2004.
CIN China Institute of Navigation
CIPM Comité International des Poids et Mesures (under CGPM)
CIR channel impulse response
CIR cockpit image recorder
CIRM Comité International Radio-Maritime
CIS Commonwealth of Independent States
CISC complex instruction set computer
CISPR International Special Committee on Radio Interference
CIT Chartered Institute of Transport
CITE conformity & interoperability test & evaluation
CIWG Communication Infrastructure Working Group (IATA)
CL Civil-Long (proposed GPS L2 code carrying no data - alongside CM)
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March 2012