| Abbreviation | Definition |
|---|---|
| RMSA | Radioman Seaman Apprentice |
| RMSN | dioman Seaman |
| RMSN | Radioman Seaman |
| RMSR | dioman Seaman Recruit |
| RMSR | Radioman Seaman Recruit |
| RMT1 | dioman (telegrapher Landline) Petty Officer 1st Class |
| RMT1 | Radioman (telegrapher Landline) Petty Officer 1st Class |
| RMT2 | dioman ((telegrapher Landline)) Petty Officer 2nd Class |
| RMT2 | Radioman ((telegrapher Landline)) Petty Officer 2nd Class |
| RMT3 | dioman (telegrapher Landline) Petty Officer 3rd Class |
| RMT3 | Radioman (telegrapher Landline) Petty Officer 3rd Class |
| RMTC | dioman (telegrapher Landline) Chief Petty Officer |
| RMTC | Radioman (telegrapher Landline) Chief Petty Officer |
| RMTSA | dioman (telegrapher Landline) Seaman Apprentice |
| RMTSA | Radioman (telegrapher Landline) Seaman Apprentice |
| RMTSN | dioman (telegrapher Landline) Seaman |
| RMTSN | Radioman (telegrapher Landline) Seaman |
| RMTSR | dioman (telegrapher Landline) Seaman Recruit |
| RMTSR | Radioman (telegrapher Landline) Seaman Recruit |
| RNAD | Royal Naval Armaments Depot |