| Abbreviation | Definition |
|---|---|
| CHMACH | Chief Machinist |
| CHNURSE | Chief Nurse |
| CHOILER | Chief Oiler |
| CHPCLK | Chief Pay Clerk |
| CHPHAR | Chief Pharmacist |
| CHPHOT | Chief Photographer |
| CHRELE | Chief Radio Electrician |
| CHSCLK | Chief Ship's Clerk |
| CHSM | Chief Sailmaker |
| CHTORP | Chief Torpedoman |
| CHWINCH | Chief Winch |
| CK | Cook |
| CK1 | Cook Petty Officer First Class |
| CK2 | Cook Petty Officer Second Class |
| CK3 | Cook Petty Officer Third Class |
| CKCC | Cook To Commander-in-chief |
| CKCDT | Cook To Commandant |
| CM | Chief Metalsmith |
| CM1 | Carpenter's Mate First Class |
| CM1 | chanic Petty Officer 1st Class |