| Abbreviation | Definition |
|---|---|
| BMG1 | Boatswain's Mate G (shipboard) Petty Officer 1st Class |
| BMG2 | Boatswain's Mate G (shipboard) Petty Officer 2nd Class |
| BMG3 | Boatswain's Mate G (shipboard) Petty Officer 3rd Class |
| BMGC | Boatswain's Mate G (shipboard) Chief Petty Officer |
| BMGSA | Boatswain's Mate G (shipboard) Seaman Apprentice |
| BMGSN | Boatswain's Mate G (shipboard) Seaman |
| BMGSR | Boatswain's Mate G (shipboard) Seaman Recruit |
| BMK1 | Boatswain's Mate K (canvasman) Petty Officer 1st Class |
| BMK2 | Boatswain's Mate K (canvasman) Petty Officer 2nd Class |
| BMK3 | Boatswain's Mate K (canvasman) Petty Officer 3rd Class |
| BMKC | Boatswain's Mate K (canvasman) Chief Petty Officer |
| BMKSA | Boatswain's Mate K (canvasman) Seaman Apprentice |
| BMKSN | Boatswain's Mate K ((canvasman)) Seaman |
| BMKSR | Boatswain's Mate K (canvasman) Seaman Recruit |
| BMR1 | Boatswain's Mate R (rigger) Petty Officer 1st Class |
| BMR2 | Boatswain's Mate R (rigger) Petty Officer 2nd Class |
| BMR3 | Boatswain's Mate R (rigger) Petty Officer 3rd Class |
| BMRC | Boatswain's Mate R (rigger) Chief Petty Officer |
| BMRSA | Boatswain's Mate R (rigger) Seaman Apprentice |
| BMRSN | Boatswain's Mate R (rigger) Seaman |