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Seaports
| Seaport Name | Seaport Code | Country |
|---|---|---|
| Caleta Olivia | ARCLO | Argentina |
| 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 |
| Churchill | CACHV | Canada |
| Charlotte | CASKI | Canada |
| Comeau Bay | CABCO | Canada |
| Clarke City | CACLC | Canada |
| Chicoutimi | CACHI | Canada |
| Chandler | CACHR | Canada |
| Charlottetown | CACHA | Canada |
| Corner Brook | CACBK | Canada |