| Abbreviation | Definition |
|---|---|
| EWSN | ectronics Warfare Technician Seaman |
| EWSN | Electronics Warfare Technician Seaman |
| EWSR | ectronics Warfare Technician Recruit |
| EWSR | Electronics Warfare Technician Recruit |
| F1 | Fireman 1st Class (non Petty Officer ) |
| F2 | Fireman 2nd Class (non Petty Officer) |
| F3 | Fireman 3rd Class (non Petty Officer) |
| FA | Fireman Apprentice |
| FA | reman Apprentice |
| FADM | eet Admiral |
| FC1 | Fire Controlman Petty Officer 1st Class |
| FC1 | re Controlman Petty Officer 1st Class |
| FC2 | Fire Controlman Petty Officer 2nd Class |
| FC2 | re Controlman Petty Officer 2nd Class |
| FC3 | Fire Controlman Petty Officer 3rd Class |
| FC3 | re Controlman Petty Officer 3rd Class |
| FCC | Fire Control Technician Chief Petty Officer |
| FCC | re Control Technician Chief Petty Officer |
| FCCM | Fire Control Technician Master Chief Petty Officer |
| FCCM | re Control Technician Master Chief Petty Officer |