| APB | Barracks ship (Auxiliary, Personnel, Barracks) |
| APC | Coastal Transport (Auxiliary, Personnel, Coastal) |
| APD | Auxiliary, Personnel, Destroyer (fast transport) |
| APH | Hospital Transport (Auxiliary, Personnel, Hospital) |
| APS | Afloat Pre-positioning Ship |
| AR | Repair ship (Auxiliary, Repair) |
| ARB | Battle Damage Repair ship (Auxiliary, Repair, Battle damage) |
| ARC | Cable Repair Ship (Auxiliary, Repair, Cable) |
| ARD | Auxiliary, Repair, Dry dock |
| ARG | Internal Combustion Engine Repair Ship (Auxiliary, Repair, Gasoline engine) |
| ARL | Landing Craft Repair Ship (Auxiliary, Repair, Landing) |
| ARS | Salvage Ship (Auxiliary, Repair, Salvage) |
| ARSD | Salvage Lifting Ship (Auxiliary, Repair, Salvage, Dock) |
| ARST | Salvage Craft Tender (Auxiliary, Repair, Salvage, Tender) |
| ARV | Aircraft Repair Ship (Auxiliary, Repair, heaVier-than-air aircraft) |
| ARVA | Aircraft Repair Ship, Airframe (Auxiliary, Repair, heaVier-than-air aircraft, Airframe) |
| ARVE | Aircraft Repair Ship, Engine (Auxiliary, Repair, heaVier-than-air aircraft, Engine) |
| ARVH | Aircraft Repair Ship, Helicopter (Auxiliary, Repair, heaVier-than-air aircraft, Helicopter) |
| AS | Submarine Tender (Auxiliary, Submarine) |
| ASPB | Assault Support Patrol Boat |