| CABAF | - | Currency And Bunker Adjustment Factor |
| CAF | - | Currency Adjustment Factor |
| CBFT | - | Cubic Feet |
| CBM | - | Cubic Metres |
| | - | Conventional Buoy Mooring |
| CBR | - | Commodity Box Rate |
| CBS | - | Cyprus Bureau of Shipping |
| CBT | - | Clean Ballast Tank |
| CC | - | Cubic Capacity |
| | - | Cubic Centimetres |
| | - | Continuation Clause |
| CCG | - | Canadian Coast Guard |
| CCS | - | China Classification Society |
| CD | - | Customary Despatch |
| C/E | - | Chief Engineer |
| CENSA | - | Council of European and Japanese National Shipowners Association |
| CES | - | Coast Earth Station |
| CFM | - | Container Flow Management |
| CFR | - | Cost and Freight |
| CFS | - | Container Freight Station |
| CFT | - | Cubic Feet |
| CG | - | Centre of Gravity |
| CGA | - | Cargo's proportion of General Average |
| CHABE | - | Charterer's Agents Both Ends |
| CHOPT | - | Charterer's Option |
| CIF | - | Cost, Insurance & Freight |
| CIF&E | - | Cost, Insurance, Freight & Exchange |
| CIF&I | - | Cost, Insurance, Freight & Interest |
| CIFC | - | Cost, Insurance, Freight and Commission |
| CIFC&I | - | Cost, Insurance, Freight, Commission & Interest |
| CIM | - | Convention Internationale Concernant le Transport des Marchandises par Chemin de Fer |
| CIP | - | Carriage and Insurance Paid to |
| | - | Calling In Port |
| CIT | - | Chartered Institute of Transport |
| CLP | - | Container Load Plan |
| CMI | - | Comité Maritime International |
| CMR | - | Convention Marchandise Routiers |
| C/N | - | Consignment Note |
| | - | Cover Note |
| | - | Credit Note |
| C/O | - | Chief Officer |
| | - | Care Of |
| CLC | - | Civil Liability Convention of 1969 |
| COA | - | Contract Of Affreightment |
| COACP | - | Contract Of Affreightment Charter Party |
| COB | - | Close Of Business |
| COC | - | Certificate Of Competency |
| | - | Carrier Owned Container |
| COD | - | Cash On Delivery |
| COF | - | Certificate Of Fitness |
| COFC | - | Container On Flat Car |
| COGS | - | Carriage of Goods by Sea |
| COGSA | - | Carriage of Goods by Sea Act |
| COMBIDOC | - | Combined Transport Document |
| COP | - | Customs Of the Port |
| COT | - | Cargo Oil Tank |
| COW | - | Crude Oil Washing |
| C/P | - | Charter Party |
| CPD | - | Charterers Pay Dues |
| CPP | - | Clean Petroleum Products |
| | - | Controllable Pitch Propeller |
| CPT | - | Carriage Paid To |
| CQD | - | Customary Quick Despatch |
| CR | - | China Corporation Register of Shipping |
| CROB | - | Cargo Remaining On Board |
| CRS | - | Croatian Register of Shipping |
| CSC | - | International Convention for Safe Containers |
| CSM | - | Container Slot Management |
| CSO | - | Company Security Officer |
| CSR | - | Chech and Slovak Ship's and Industrial Register |
| | - | Continuous Service Rate |
| CST | - | Central Standard Time |
| | - | Centistoke |
| CT | - | Conference Terms |
| CTL | - | Constructive Total Loss |
| CTO | - | Combined Transport Operator |
| CUFT | - | Cubic Feet |
| CVs | - | Consecutive Voyages |
| CY | - | Container Yard |
