| Abbreviation | Definition |
|---|---|
| BTV | Bus Tie Breaker |
| BU | Back Up |
| BVLOS | Beyond Visual Line Of Sight |
| BVMAC | Brighouse Vintage Model Aircraft Club (UK) |
| BWI | Baltimore - Thurgood Marshall International Airport Rail Station |
| BWL | Body Water Line |
| BZI | Baseline Zonal Inspection |
| C | Cargo/Transport aircraft |
| C | C-Check |
| C | Coast Guard (military aircraft prefix) |
| C&EA | Configurations Engineering Analysis |
| C&EA | Configurations & Engineering Analysis |
| C.G. | Center of Gravity |
| C/B | Circuit Breaker |
| C/L | Center Line |
| C/O | Change Over |
| C/W | Completed Work |
| CAA | Campaign Against Aviation |
| CAA | Civil Aeronautics Administration |
| CAA | Civil Airworthiness Authority |