| Carrier Code | Carrier Name |
| RMSU | RHEIN MAAS UND SEE SCHIFFAHRTSKONTOR GMBH |
| RNCU | REGENCY NAVIGATION CO LTD |
| RNIU | RAINBOW NAVIGATION INC |
| RNOM | RUGGIERO & OGLE MOTORSHIP AGENCY INC |
| ROCU | ROEHLIG AND COMPANY |
| RODV | RODON INVESTMENTS S A C/O NEREUS SHIPPING CO S A |
| ROIU | RIVOIRA |
| ROLU | RO-LO PACIFIC LINE |
| ROMP | ROMEO SHIPPING LTD |
| RONU | REDON INC |
| ROWU | ROYAL WAGON SARL |
| ROYU | ROYAL NETHERLANDS STEAMSHIP CO (NEDLLOYD LINES, ROTTERDAM) |
| RPLV | REPUBLICA DE VENEZUELA |
| RPRU | RHONE POULENC CHIMIE |
| RQTC | ROYAL TANKERS CORPORATION |
