| Abbreviation | Definition |
|---|---|
| ETRSA | ectronics Technician (radar) Seaman Apprentice |
| ETRSA | Electronics Technician (radar) Seaman Apprentice |
| ETRSN | ectronics Technician (radar) Seaman |
| ETRSN | Electronics Technician (radar) Seaman |
| ETRSR | ectronics Technician (radar) Seaman Recruit |
| ETRSR | Electronics Technician (radar) Seaman Recruit |
| ETS1 | ectronics Technician (sonar) Petty Officer 1st Class |
| ETS1 | Electronics Technician (sonar) Petty Officer 1st Class |
| ETS2 | ectronics Technician (sonar) Petty Officer 2nd Class |
| ETS2 | Electronics Technician (sonar) Petty Officer 2nd Class |
| ETS3 | ectronics Technician (sonar) Petty Officer 3rd Class |
| ETS3 | Electronics Technician (sonar) Petty Officer 3rd Class |
| ETSA | ectronics Technician Seaman Apprentice |
| ETSA | Electronics Technician Seaman Apprentice |
| ETSC | ectronics Technician (sonar) Chief Petty Officer |
| ETSC | Electronics Technician (sonar) Chief Petty Officer |
| ETSN | ectronics Technician Seaman |
| ETSN | Electronics Technician Seaman |
| ETSR | ectronics Technician Seaman Recruit |
| ETSR | Electronics Technician Seaman Recruit |