Seaports
| Seaport Name | Seaport Code | Country |
|---|---|---|
| Cossack | AUPWL | Australia |
| Carnarvon | AUCVQ | Australia |
| Cape Preston | AUCPN | Australia |
| Cape Leeuwin | AUCLN | Australia |
| Cooktown | AUCTN | Australia |
| Caloundra Head | AUCAL | Australia |
| Cairns | AUCNS | Australia |
| Chittagong | BDCGP | Bangladesh |
| Chalna | BDCHL | Bangladesh |
| Cotonou | BJCOO | Benin |
| Cabedelo | BRCDO | Brazil |
| Clarke City | CACLC | Canada |
| Chicoutimi | CACHI | Canada |
| Chandler | CACHR | Canada |
| Charlottetown | CACHA | Canada |
| Corner Brook | CACBK | Canada |
| Come By Chance Bay | CACBC | Canada |
| Clarenville | CACLE | Canada |
| Cape Race | CACRE | Canada |
| Chatham (Can) | CACTM | Canada |