| Abbreviation | Definition |
|---|---|
| ESH2 | Harbor Defense (sonarman) Petty Officer 2nd Class |
| ESH2 | rbor Defense (sonarman) Petty Officer 2nd Class |
| ESH3 | Harbor Defense (sonarman) Petty Officer 3rd Class |
| ESH3 | rbor Defense (sonarman) Petty Officer 3rd Class |
| ESHC | Harbor Defense (sonarman) Chief Petty Officer |
| ESHC | rbor Defense (sonarman) Chief Petty Officer |
| ESHSA | Harbor Defense (sonarman) Seaman Apprentice |
| ESHSA | rbor Defense (sonarman) Seaman Apprentice |
| ESHSN | Harbor Defense (sonarman) Seaman |
| ESHSN | rbor Defense (sonarman) Seaman |
| ESHSR | Harbor Defense (sonanman) Seaman Recruit |
| ESHSR | rbor Defense (sonanman) Seaman Recruit |
| ESI1 | Instructor (miscellaneous) Petty Officer 1st Class |
| ESI1 | structor (miscellaneous) Petty Officer 1st Class |
| ESI2 | Instructor (miscellaneous) Petty Officer 2nd Class |
| ESI2 | structor (miscellaneous) Petty Officer 2nd Class |
| ESI3 | Instructor (miscellaneous) Petty Officer 3rd Class |
| ESI3 | structor (miscellaneous) Petty Officer 3rd Class |
| ESIC | Instructor (miscellaneous) Chief Petty Officer |
| ESIC | structor (miscellaneous) Chief Petty Officer |