| AC | COLLIER |
| ACS | AUXILIARY CRANE SHIP |
| AD | DESTROYER TENDER |
| AE | AMMUNITION SHIP |
| AF | STORE SHIP |
| AFS | COMBAT STORE SHIP |
| AG | MISCELLANEOUS |
| AGDS | DEEP SUBMERGENCE SUPPORT SHIP |
| AGER | ENVIRONMENTAL RESEARCH SHIP |
| AGF | MISCELLANEOUS COMMAND SHIP |
| AGFF | AUXILIARY GENERAL FRIGATE |
| AGM | MISSILE RANGE INSTRUMENTATION SHIP |
| AGOR | OCEANOGRAPHIC RESEARCH SHIP |
| AGOS | OCEAN SURVEILLANCE SHIP |
| AGP | Torpedo Boat Tender |
| AGR | RADAR PICKET SHIP |
| AGS | SURVEYING SHIP |
| AGSS | AUXILIARY RESEARCH SUBMARINE |
| AH | HOSPITAL SHIP |
| AK | CARGO SHIP |
| AKL | LIGHT CARGO SHIP |
| AKR | VEHICLE CARGO SHIP |
| Oiler / Tanker |
| AO | OILER |
| AOE | FAST COMBAT SUPPORT SHIP |
| AOG | GASOLINE TANKER |
| AOR | REPLENISHMENT OILER |
| AOT | TRANSPORT OILER |
| AP | TRANSPORT |
| APA | ASSAULT TRANSPORT |
| APD | HIGH SPEED TRANSPORT |
| APV | AVIATION TRANSPORT |
| AR | REPAIR SHIP |
| ARC | CABLE REPAIRING SHIP |
| ARL | REPAIR SHIP, SMALL |
| ARS | SALVAGE SHIP |
| ARVE | AIRCRAFT REPAIR SHIP ENGINE |
| AS | SUBMARINE TENDER |
| ASR | SUBMARINE RESCUE SHIP |
| AT | TUGS |
| ATA | AUXILIARY OCEAN TUG |
| ATF | FLEET OCEAN TUG |
| ATS | SALVAGE AND RESCUE SHIP |
| AV | SEAPLANE TENDER |
| AVB | AVIATION LOGISTIC SUPPORT SHIP |
| AVM | GUIDED MISSILE SHIP |
| AVT | AUXILIARY AIRCRAFT LANDING TRAINING SHIP |
| CONT | CONTAINER SHIPS |
