| Abbreviation | Definition |
|---|---|
| GMCB1 | Gunner's Mate (construction Battalion) Petty Officer 1st Class |
| GMCB1 | nner's Mate (construction Battalion) Petty Officer 1st Class |
| GMCB2 | Gunner's Mate (construction Battalion) Petty Officer 2nd Class |
| GMCB2 | nner's Mate (construction Battalion) Petty Officer 2nd Class |
| GMCB3 | Gunner's Mate ((construction Battalion)) Petty Officer 3rd Class |
| GMCB3 | nner's Mate ((construction Battalion)) Petty Officer 3rd Class |
| GMCBG1 | Gunner's Mate (construction Battalion-armorer Petty Officer 1st Class |
| GMCBG1 | nner's Mate (construction Battalion-armorer Petty Officer 1st Class |
| GMCBG2 | Gunner's Mate (construction Battalion-armorer Petty Officer 2nd Class |
| GMCBG2 | nner's Mate (construction Battalion-armorer Petty Officer 2nd Class |
| GMCBG3 | Gunner's Mate (construction Battalion-armorer Petty Officer 3rd Class |
| GMCBG3 | nner's Mate (construction Battalion-armorer Petty Officer 3rd Class |
| GMCBP1 | Gunner's Mate (construction Battalion- Powderman) Petty Officer 1st Class |
| GMCBP1 | nner's Mate (construction Battalion- Powderman) Petty Officer 1st Class |
| GMCBP2 | Gunner's Mate (construction Battalion- Powderman) Petty Officer 2nd Class |
| GMCBP2 | nner's Mate (construction Battalion- Powderman) Petty Officer 2nd Class |
| GMCBP3 | Gunner's Mate (construction Battalion- Powderman) Petty Officer 3rd Class |
| GMCM | Gunner's Mate (missiles) Master Chief Petty Officer |
| GMCM | Gunner's Mate Master Chief Petty Officer |
| GMCS | Gunner's Mate (missiles) Senior Chief Petty Officer |