| Abbreviation | Definition |
|---|---|
| QMSN | Quartermaster Seaman |
| QMSR | Quartermaster Seaman Recruit |
| QMSSA | Quartermaster (signalman) Seaman Apprentice |
| QMSSN | Quartermaster (signalman) Seaman |
| QMSSR | Quartermaster (signalman) Seaman Recruit |
| R21 | HMAS Melbourne |
| RA | Rear Admiral |
| RAMICS | Rapid Airborn Mine Clearence System |
| RANC | Royal Australian Naval College, |
| RANR | Royal Australian Naval Reserve |
| RCNC | Royal Corps of Naval Constructors |
| RD1 | Radarman Petty Officer 1st Class |
| RD2 | Radarman Petty Officer 2nd Class |
| RD3 | Radarman Petty Officer 3rd Class |
| RDC | darman Chief Petty Officer |
| RDC | Radarman Chief Petty Officer |
| RDM1 | darman 1st Class Petty Officer |
| RDM1 | Radarman 1st Class Petty Officer |
| RDM2 | darman 2nd Class Petty Officer |
| RDM2 | Radarman 2nd Class Petty Officer |