| Abbreviation | Definition |
|---|---|
| CMMG | ief Machinist's Mate(gas Generating) |
| CMMMB | Chief Machinist's Mate(motor Boat) |
| CMMMB | ief Machinist's Mate(motor Boat) |
| CMMO | Chief Machinist's Mate(optician) |
| CMMO | ief Machinist's Mate(optician) |
| CMMR | Chief Machinist's Mate(refrigeration) |
| CMMR | ief Machinist's Mate(refrigeration) |
| CMMS | Chief Machinist's Mate(shop) |
| CMMS | ief Machinist's Mate(shop) |
| CMMW | Chief Machinist's Mate (watch Maker) |
| CMMW | ief Machinist's Mate (watch Maker) |
| CMN | Chief Mineman |
| CMN | ief Mineman |
| CMOMM | Chief Motor Machinist's Mate |
| CMOMM | ief Motor Machinist's Mate |
| CMOMMT | Chief Motor Machinist's Mate(turbine) |
| CMOMMT | ief Motor Machinist's Mate(turbine) |
| CMSRB | Carpenter's Mate (ship Repair, Boatbuilders) |
| CMSRB | rpenter's Mate (ship Repair, Boatbuilders) |
| CMSRC | Carpenter's Mate (ship Repair, Carpenter's) |