| Abbreviation | Definition |
|---|---|
| BTGFA | Boilerman (shipboard) Fireman Apprentice |
| BTGFN | Boilerman (shipboard) Fireman |
| BTGFR | Boilerman (shipboard) Fireman Recruit |
| BTR1 | Boilerman (repairman) Petty Officer 1st Class |
| BTR2 | Boilerman (repairman) Petty Officer 2nd Class |
| BTR3 | Boilerman (repairman) Petty Officer 3rd Class |
| BTRC | Boilerman (repairman) Chief Petty Officer |
| BTRFA | Boilerman (repairman) Fireman Apprentice |
| BTRFN | Boilerman (repairman) Fireman |
| BTRFR | Boilerman (repairman) Fireman Recruit |
| BU1 | Builder Petty Officer 1st Class |
| BU2 | Builder Petty Officer 2nd Class |
| BU3 | Builder Petty Officer 3rd Class |
| BUC | Builder Chief Petty Officer |
| BUCA | Builder Constructionman Apprentice |
| BUCN | Builder Constructionman |
| BUCR | Builder Constructionman Recruit |
| BUCS | Builder Senior Chief Petty Officer |
| BUGLER1 | Bugler First Class |
| BUGLER2 | Bugler Second Class |