C
CA Certifying Authority
  Corrosion Allowance
  Consequence Analysis 
   Contract Award
CAA Civil American Authorities
  Civil Aviation Authorities (UK) 
  Clean Air Act of 1970 (USA)
CAAA90 The Clean Air Amendments of 1990 (USA)
CABAS  Corrosion des Aciers par les Bactéries Anaérobies Sulfurogènes (french) 
CACA Air to Air Cooled (generator)
CACF Corrosion Fatigue Fracture Mechanics of High Strength Steels UK/Norway research project
CACW Air to Water Cooled (generator)
CAD Computer Assisted Drawing (drafting) / Computer Assisted Design
CADC  Canadian Association of Diving Contractors   
CADD  Computer Aided Design and Drawings 
CAF Conductive Anodic Filament
CAGC   Canadian Association of Geophysical Contractors
CAGI Compressed Air and Gas Institute (USA)
CAI Controlled Auto Ignition
CALM Catenary Anchor Leg Mooring
CAMI   Coated Abrasives Manufacturing Institute, Inc. (USA) see AES
CAP Civil Aviation Publication (UK)
  Condition Assesment Programme survey
CAPEX Capability Exercise
pipe and tube supplier : website
CAR Crack Area ratio
  Corrective Actions Request / Report
CARICOM Caribbean Community website
CAS Cast Alloy Steel
Channel Associated Signaling
CaTS  Cableless Telemetry System 
CATS  Central Area Transmission System 
CB Circuit Breaker
  Center of Buoyancy
CBA Cost Benefice Analysis
CBI  Confederation of British Industry website
  Computer-Based Information 
CBM Coal Bed Methane
CBR California Bearing Ratio (measure of shearing resistance of the soil under controlled density and moisture conditions)
CBT Clean Ballast Tank
  Computer-Based Training 
CC  Choke valve : Close 
  Cubic Centimetre 
CCD Coupled Charged Device (camera)
CCASG Cooperation Council for the Arab States of the Gulf (also known as GCC and AGCC) website
CC&A  Clean Caribbean & Americas
CCC  Clean Caribbean Cooperative (now CC&A)
  Carrier Container Council
CCDS Cement and cuttings disposal system
CCF Closed Caisson Foundation
CCIMS  Close Coupled Instrument Mounting System
CCIR International Radio Consultative Comittee
CCK Commissioning Check List
CCM  Continuous Current Method
CCMRG Commonwealth Consultative Group on Mineral Resources and Geology  
CCO Chief Conservation Officer (CNOPB)
CCP  Compressor Control Panel 
  Controlable Pitch Propeller 
CCPA  Cemented Carbide Producers Association (USA) website 
CCR Central Control Room
CCS Cast Carbon Steel
  China Classification Society 
CCTG Book of General Technical Requirements of the French Ministry of Equipment
CCTV Closed Circuit TV
CCU  Catalytic Cracking Unit 
CCVT Closed Cycle Vapour Turbogenerator
CD Closed Drains
  Chart Datum
Compact Disk
  Calendar Day 
  Cellar Deck 
  Contract Depth 
CDA  Common Data Access 
CDD Casing Directional Drilling
CDI Course Deviation Indicator
CDM  Construction, Design & Management 
CDMA Code Division Multiple Access
CDP Common Depth Point
CDQ  Central  Drilling and Quarters 
C&E (well) Completion and Equipment
CE Carbon Equivalent
  Community European 
CEDAR Central European Environmental Data Request Facility website
CEDRE  French Centre for Documentation, Research and Development for Accidental Water Pollution
CEFRACOR  Centre Français de l'anticorrosion (french organism)
CEI (or IEC) Commission Electrotechnique Internationale (standard) website
  Council for Engineering Institution 
CELP Code Excited Linear Prediction
CEN European Committee for Standardization
CENELEC Comité Européen de Normalisation Electrotechnique : see CEN
centr Centrifugal
CEPM Comité d'Etudes Pétrolières et Marines (french organisation)
CEPT European Conference of Postal and Telecommunications administrations  website
CER Crack Extension Ratio
  Central Equipment Room 
CERI Canadian Energy Research Institute website
CERT Computer Emergency Response Team
CES  Coast Earth Station 
CESMA  Confederation of European Union Shipmasters Associations 
CETEC  Centre d'Essais Techniques et d'Evaluation de Cherbourg (France) 
CETIM  Centre Technique des Industries Mécaniques (France) website
CF Cellulosic Fire
CFD Complete Factorial Design
  Computational Fluid Dynamics 
CFE Cumulative Frequency Extrapolation
CFL  Compact Fluorescent Light 
CFR Code of Federal Regulations (US) website
CFS Cubic Feet per Second
CFT  Call For Tender 
C&G  Clearing & Grubbing 
CG  Coast Guard 
CGA  Compressed Gas Association (USA) website 
CGG  Compagnie Generale de Geophysique 
CGMHC  Caribbean and Gulf of Mexico Hydrographic Commission website
CGOM   IOC Consultative Group on Ocean Mapping website
CGR  Condensate Gas Ratio 
CGSB  Canadian General Standards Board website 
C/H  Cased hole
CHARM  Chemical Hazard  Risk Model/ Management 
CHIRP Compressed High Intensity Radar Pulse
CHRIS   IHO Committee on Hydrographic Requirements for Information Systems (CHRIS)
CHS   Canadian Hydrographic Service website
CI Common Interface
CIBSE Chartered Institution of Building Service Engineers
CIDS  Concrete Island Drilling Structure 
CIESIN Consortium for International Earth Science Information Network website 
CIESM International Commission for Scientific Exploration of the Mediterranean Sea   website
CIDA Canadian International Development Agency
CIF Cost, Insurance and Freight
CIMA  Construction Industry Manufacturers Association(USA)
CIMarE   Canadian Institute of Marine Engineering, Canada website 
CIMV  Chemical Injection Metering Valve 
CIP  Chemical Injection Panel 
CIR Central Instrument Room
  Commited Information Rate 
CIRM  International Radio Maritime Committee 
CIS Commonwealth of Independent States (Armenia, Azerbajan, Belarus, Georgia, Kazakhstan,
Kyrgyzstan, Moldova, Russia, Tajikistan, Turkmenistan, Ukraine and Uzbekistan) website 
  Chemical Inspection System 
CISP  Cast Iron Soil Pipe Institute (USA) website
CISPR Comité International Spécial des Perturbations Radioélectriques / International Special Committee on Radio Interface (comittee of CEI)
CIT  Chartered Institute of Transport 
CITB Construction Industry Training Board (UK)
CITHP  Closed-in Tubing Head Pressure 
CITV Chemical Injection Throttle Valve
CIV Chemical Injection Valve 
  Chemical Isolation Valve 
CL2  Liquid Chlorine 
CLAROM  Club pour les Actions de Recherche sur les Ouvrages en Mer  website 
CLC International Convention on Civil Liability for Oil Pollution Damage 
CLC 92  1992 Protocol to the International Convention on Civil Liability for Oil Pollution Damage (IMO website
CLCS Commission on the Limits of the Continental Shelf website
CLR Crack Length Ratio
CMAA Crane Manufacturers Association of America, website
CMB  Conventional Mooring Buoy 
  Choke Manifold Base 
CMC  Certification of Materials & Components (DNV) 
CMID  Common Marine Inspection Document (IMCA) 
CMMS Computer Maintenance Management System
C-Mn  Carbon Manganese steel 
CMO Chief Medical Officer
CMP Common Mid Point
Chemical Management Plan
CMR  Combinable Magnetic Resonance 
CMS  Commissioning Management System 
CMTS   Controle Module Test Stand 
CNET Centre National d’Etudes des Telecommunications (France Telecom)  website
CNEXO Centre National pour l'Exploitation des Oceans (France) merged into IFREMER)  in 1999
CNG  Compressed Natural Gas 
CNOPB Canadian Newfoundland Offshore Petroleum Board  website
CNPP >Centre National de Prévention et de Protection
CNRS Centre National de la Recherche Scientifique (french laboratories)
CNS  Central North Sea 
  Chinese National Standards  website
CO  Carbon monoxide 
  Choke valve : Open 
  Cleaned/circulated Out 
  Chain Operator 
CO2  Carbon dioxide 
COA  Contract Of Affreightment 
CO&S Clean Out and Shoot (well) 
C-O Computed versus Observed (corrections)
COB  Close of Business 
COCATRAM  Commision Centroamerican de Transporte Maritimo (Managua, Nicaragua)
COD Crack Opening Displacement
Commercial Operation Date
  Chemical Oxygen Demand 
CODAP French code governing the construction of unfired pressure vessels
CODETI French code governing the construction of industrial pipings  website
COE Corps Of Engineers website
COF  Calculated Open Flow 
CoF  Certificate of Fitness 
COFREND Comité Français des Essais Non Destructifs
CoG Center Of Gravity
COHb  CarbOxyHaemoglobin 
COIP  Centro Operativo Integral de Perforacion (Mexican acronym) 
COLREG Convention on the international Regulations for preventing collisions at sea website
COMAH  Control Of Major Accidents Hazards 
COMSAR IMO Sub-Committee on Radiocommunications and Search and Rescue website
CONCAWE  Oil Companies European Organisation for Environmental and Health Protection
COOL Cryogenic Offshore Offloading or Loading terminal
COP  Code Of Practice 
COPAS Council of Petroleum Accountants Society (USA)  website
CoQ  Certificate of Quantity / Quality 
COR  Chart(er) Of Requirements 
  Concentric Offset Riser 
CORDIS The European Community Research and Development Information Service webpage
COSEP  matériaux Composites pour Séparateur en Eau Profonde(french) 
COSHH  Control of Substances Hazardous to Health (UK Regulation ) website 
COSWP  Code of Safe Working Practices  
COST  European Cooperation in the field Of Scientific Technical research  website 
COTS Commercial Off The Shelf (components) 
COV  CrossOver Valve
COW Crude Oil Washing
CP Cathodic / Corrosion Protection
  Conductor Pipe
  Casing Pressure 
Cp  Centipoise, a unit of measurement of dynamic viscosity 
CPB Counter Pollution Branch (UK, part of MCA)  webpage
CPCS  Construction Plant Competence Scheme  (UK)
CPDP  Comité Professionnel Du Pétrole
CPE Center for Petroleum Engineering (Australia) website
CPF  Casing Pressure, Flowing 
CPGE Center for Petroleum and Geosystems Engineering (University of Texas) website
CPI  Choke Position Indicator 
  Consumer Price Index
cplg Coupling
CPMB  Concrete Plant Manufacturers Bureau (USA) website
CPP  Certified Protection Professional (ASIS) 
  Central Processing Plant / Platform
CPRNW IHO Commission on Promulgation of Radio Navigational Warnings webpage
CPS Coating Performance Standard
CPSI  Casing Pressure, Shut In 
CPT Cone Penetration Test
  Compliant Piled Tower 
CPTU Cone Penetration Test with Pore Pressure
CPU Control Process Unit / Central Processing Unit
CQC  Construction Quality Control 
CQSR Construction Quality Submittal Requirements 
CR Contractor
  Client / Customer Representative 
  Criticality Rating / Critical Ratio 
  Change Request 
  Construction regulation 
CRA Corrosion Resistant Alloy
  Comparative Risk Assessment 
CREWES Project The Consortium for Research in Elastic Wave Exploration Seismology website
CRI Cutting Re-Injection
CRINE  Cost Reduction Initiative for the New Era - joint initiative by the UK government and the Oil industry to standardise documentation thereby reducing cost 
CRISTAL  Contract Regarding a Supplement to Tanker Liability for Oil Pollution (ended 1997)  
CRM Customer Relationship Management
  Coorosion Resistant Material 
CRS Clock Reference System
CRSI  Concrete Reinforcing Steel Institute (USA) website
CRT Camera Running Tool
CS Carbon Steel
CSA  Canadian Standards Association website 
  Continental Shelf Act
  Cross Sectional Area (electrical cables) 
CSC IHO Chart Standardization Committee webpage
  Car Seal Closed  (PSV's) 
CSCC Chloride induced Stress Corrosion Cracking 
CSCS  Construction Skills Certification Scheme (UK)  
CSD  Cutter Suction Dredger 
CSDA  Concrete Sawing and Drilling Association (USA) website 
CSEM  Controlled Source ElectroMagnetic 
CSF  Construction Support Facilities 
CSG (csg) Casing
CSIRO Commonwealth Scientific and Industrial Research Organisation (Australie) website
CSL Commissioning Site Leader
C&SMWG CHRIS working Group on ECDIS colours and symbols webpage 
CSMA  Calcul of Structures and Modelisation Association  website
CSMA/CD  Carrier Sensing Multiple Access with Corrosion Detection 
CSO  Car Seal Open  (PSV's) 
CSON  Continental Shelf Operations Notice 
CSP Company Security Policy
  ChloroSulfonated Polyethylene
CSPCWG  CHRIS working Group on Paper charts  webpage
CSR Crack Sensitivity Ratio
  Concept Selection Report
Common Structural Rules (from IACS)
CSS  Code of Shipmanagement Standards (see ISMA
cST Centistroke, unit of measurement
CSTB French laboratory (Centre Scientifique et Technique du Bâtiment)<
CSTG International Coordination of Space Techniques for Geodesy and Geodynamics website
CSTR Constantly Stirred Tank Reactor
CSW Conductor Sharing Wellhead  (TM
CSWIP Certification Scheme for Welding & Inspection Personnel
CT Current Transformer
  Combustion Turbine
  Connecting Tool 
  Computer Tomography 
  Coiled Tubing 
CTCU Cable Traction Control Unit
CTD Chlorine, Temperature and Depth (salinity measurement instrument)
  Conductivity Temperature Depth
Coiled Tubing Drilling
CTICM Centre Technique Industriel de la Construction Métallique
CTN  Compensated Thermal Neutron (Trade Mark) Sensor  
CTOD Crack Tip Opening Displacement (testing)
CTR Crack Thickness Ratio
CTRs  Cost, Time and Resource planning sheets 
CTU  Cargo Transport Unit 
CUI Corrosion Under Insulation
cum wt  cumulative weight 
CUSP  Connection of Underwater Systems and Pipe/flowlines (Alpha Thames ltd trade mark) 
CV Choke / Control Valve
CVC  Cameron Vertical Connexion (Trade Mark) system
CVA  Certifying Verification Authority 
CVI Close Visual Inspection
CVRT Choke Valve Running/Retrieval Tool
CVFDR  Cockpit Voice and Flight Data Recorder (aircrafts) 
C&WP  Compression & Water injection Platform 
CW  Cold / Cooling Water     
CWIP Construction Work In Progress
C/WO  Completion/WorkOver 
CWU Chilling Water Unit 
CZM  Coastal Zone Management