| Abbreviation | Definition |
|---|---|
| COMMTECH | Chief Communications Technician |
| COMMTECH | ief Communications Technician |
| COMO | Commodore |
| COMO | mmodore |
| COMSOPAC | Commander, South Pacific Area |
| COMSYENS | Commissary Ensign |
| COMSYENS | mmissary Ensign |
| CONSTELEC | Chief Construction Electrician |
| CONSTELEC | ief Construction Electrician |
| COOPER | Cooper |
| COOPER | oper |
| COS | Chief Operations Specialist |
| COS | ief Operations Specialist |
| COX | ckswain |
| COX | Cockswain |
| COXCBB | Coxswain (construction Battalion, Boatswain) |
| COXCBB | xswain (construction Battalion, Boatswain) |
| COXCBS | Coxswain (construction Battalion, Stevedore |
| COXCBS | xswain (construction Battalion, Stevedore |
| COXCC | Coxswain To Commander-in-chief |