| CODE | NAME |
| ABS | AMERICAN BUREAU OF SHIPPING |
| BV | BUREAU VERITAS |
| CCS | CHINA CLASSIFICATION SOCIETY |
| CRS | CROATIAN REGISTER OF SHIPPING |
| DNV | DNV |
| IRCLASS | INDIAN REGISTER OF SHIPPING |
| KRS | KOREAN REGISTER OF SHIPPING |
| LR | LLOYD'S REGISTER |
| CLASSNK | NIPPON KAIJI KYOKAI |
| PRS | POLSKI REJESTR STATKOW S.A. |
| RINA | REGISTRO ITALIANO NAVALE |
| TL | TÜRK LOYDU |
| NON-IACS | |
| CODE | NAME |
| ARS | ALFA REGISTER OF SHIPPING |
| BRS | BULGARIAN REGISTER OF SHIPPING |
| CONARINA | CONARINA LLC S.A. |
| DBS | DROMON BUREAU OF SHIPPING |
| ICS CLASS | INTERMARITIME CERTIFICATION SERVICES, S.A., |
| INSB CLASS | INTERNATIONAL NAVAL SURVEYS BUREAU-CLASSIFICATION SOCIETY S.A. |
| IBS | ISTHMUS BUREAU OF SHIPPING |
| MTSS | MARITIME TECHNICAL SYSTEMS & SERVICES LIMITED |
| CLASSNU | NEW UNITED (INT'L) MARINE SERVICES LTD |
| NOVELCLASS | NOVEL CLASSIFICATION SOCIETY S.A. |
| OMCS CLASS | OVERSEAS MARINE CERTIFICATION SERVICES |
| PMDS | PANAMA MARITIME DOCUMENTATION SERVICES |
| PHRS | PHOENIX REGISTER OF SHIPPING S.A. |
| SGBOS | SINGAPORE BUREAU OF SHIPPING |
| UMB CLASS | UNIVERSAL MARITIME BUREAU CO., LTD |
| VRSCLASS | VERITAS REGISTER OF SHIPPING LTD |
