| Abbreviation | Definition |
|---|---|
| ABEB | Advanced Bridge Erection Boat |
| ABRS | Auto and Boat Relocation Services |
| ABYC | American Boat and Yacht Council |
| AC | aircraft carrier |
| AC | America's Cup |
| ACL | Allowable Cargo Load |
| ACSC | Alameda Community Sailing Center |
| ADBA | American Dragon Boat Association |
| ADBC | Annapolis Dragon Boat Club |
| ADBF | Alcan Dragon Boat Festival |
| ADBF | Australian Dragon Boat Federation |
| AGFF | Frigate Research Ship |
| AMSA | Australian Maritime Safety Authority |
| AMTB | Anti Motor Torpedo Boat |
| APBG | Australian Patrol Boat Group |
| ASBC | Anacortes Small Boat Center |
| ATL | Authority To Leave |
| AUBC | Adelaide University Boat Club |
| B/L | Bill of Lading |
| BAYS | Bay Area Youth Sailing |