| Abbreviation | Definition |
|---|---|
| RDM3 | darman 3rd Class Petty Officer |
| RDM3 | Radarman 3rd Class Petty Officer |
| RDSA | darman Seaman Apprentice |
| RDSA | Radarman Seaman Apprentice |
| RDSN | darman Seaman |
| RDSN | Radarman Seaman |
| RDSR | darman Seaman Recruit |
| RDSR | Radarman Seaman Recruit |
| REBAL | Rechargeable Battery Automatic Lanterns |
| RELE | dio Electrician |
| RELE | Radio Electrician |
| RETAR | Retargeting |
| RM1 | dioman Petty Officer 1st Class |
| RM1 | Radioman Petty Officer 1st Class |
| RM2 | dioman Petty Officer 2nd Class |
| RM2 | Radioman Petty Officer 2nd Class |
| RM3 | dioman Petty Officer 3rd Class |
| RM3 | Radioman Petty Officer 3rd Class |
| RMC | dioman Chief Petty Officer |
| RMC | Radioman Chief Petty Officer |