| Ship Types |
| AB |
Crane Ship |
| AC |
Collier |
| ACO |
Collier with tanker capacity |
| ACM |
Auxiliary Minelayer |
| ACV |
Auxiliary Aircraft Carrier (CVE) |
| AD |
Destroyer Tender |
| ADG |
Degaussing Ship |
| AE |
Ammunition Ship |
| AEL |
Small Ammunition Ship |
| AF |
Stores Ship |
| AFD |
Mobile Floating Crane |
| AFDB |
Large Auxiliary Floating Drydock (Non-Self-Propelled) |
| AFDL(C) |
Small Auxiliary Floating Drydock (Concrete) |
| AFDM |
Medium Auxiliary Floating Drydock (Non-Self-Propelled) |
| AFS |
Combat Stores Ship |
| AG |
Miscellaneous Auxiliary |
| AGB |
Icebreaker |
| AGC |
Amphibious Force Command Ship |
| AGCL |
Small Communications Ship |
| AGD |
Seagoing Dredge |
| AGDE |
Escort Research Ship |
| AGDS |
Deep Submergence Support Ship |
| AGF |
Miscellaneous Command Ship |
| AGL |
Lighthouse Tender |
| AGP |
Patrol Craft Tender |
| AGOR |
Oceanographic Research Ship |
| AGM |
Mine Craft Tender |
| AGS |
Surveying Ship |
| AGT |
Target Service Ship |
| AH |
Hospital Ship |
| AK |
Cargo Ship |
| AKA |
Attack Cargo Ship |
| AKD |
Deephold Cargo Ship |
| AKE |
Ammunition Transport |
| AKF |
Refrigerated Cargo Ship |
| AKL |
Light Cargo Ship |
| AKN |
Net Cargo Ship |
| AKS |
General Stores Ship |
| AKV |
Cargo Ship & Aircraft Ferry |
| AL |
Lighthouse Ship |
| ALS |
Auxiliary Lighter Ship |
| AM |
Minesweeper |
| AMc |
Coastal Minesweeper |
| AMA |
Auxiliary Minesweeper |
| AMM |
Motor Minesweeper |
| AMS |
High Speed Minesweeper |
| AN |
Net-Laying Ship |
| AO |
Fleet Oiler (transports oil and can refuel ships at sea) |
| AOT |
Tanker for oil (only transports oil) |
| AOG |
Tanker for gasoline (only transports gasoline) |
| AP |
Transport (passenger and/or cargo transport) |
| APA |
Attack Transport |
| APB |
Self-Propelled Barracks Ship |
| APc |
Coastal Transport |
| APD |
Destroyer Transport (High Speed) |
| APH |
Evacuation Transport |
| APL |
Barracks Ship (Non-Self-Propelled) |
| APM |
Mechanized Artillery Transport |
| APS |
Transport Submarine |
| APV |
Transport & Aircraft Ferry |
| AR |
Repair Ship |
| ARB |
Battle-Damage Repair Ship |
| ARC |
Cable Repair Ship |
| ARD |
Auxiliary Repair Drydock (Floating Repair Drydock) |
| ARG |
Repair Ship, Internal Combustion Engine |
| ARH |
Repair Ship, Heavy Hull |
| ARL |
Repair Ship, Landing Craft |
| ARS |
Salvage Ship |
| ARS(T) |
Salvage Vessel Tender |
| ARV |
Aircraft Repair Ship |
| ARV(A) |
Aircraft Repair Ship (Aircraft) |
| ARV(E) |
Aircraft Repair Ship (Engines) |
| AS |
Submarine Tender |
| ASR |
Submarine Rescue Vessel |
| AT |
Tug |
| ATA |
Auxiliary Tug |
| ATF |
Ocean-Going Tug, Fleet |
| ATO |
Ocean-Going Tug, old |
| ATR |
Rescue Tug |
| ATS |
Salvage & Rescue Ship |
| AV |
Seaplane Tender |
| AVB |
Advanced Aviation Base Ship |
| AVC |
Catapult Tender |
| AVD |
Seaplane Tender (Destroyer) |
| AVG |
Escort Vessel (Aircraft) = CVE |
| AVP |
Small Seaplane Tender |
| AVS |
Aviation Supply Ship |
| AVT |
Auxiliary Aircraft Transport Ship |
| AW |
Distilling Ship |
| AWK |
Water Tanker |
| AX |
Training Vessel |
| AXS |
Sail Training Vessel |
| AZ |
Lighter-Than-Air Aircraft Tender |
| BB |
Battleship |
| BBc |
Coastal Battleship |
| BC |
Battle Cruiser |
| CA |
Heavy Cruiser |
| CB |
Large Cruiser (Designation unique to the Alaska-class) |
| CL |
Light Cruiser |
| CL(AA) |
Light Cruiser (Antiaircraft) |
| CM |
Minelayer |
| CMc |
Coastal Minelayer |
| CV |
Aircraft Carrier (Fleet) |
| CVE |
Aircraft Carrier (Escort) |
| CVL |
Aircraft Carrier (Light) |
| CVS |
Aircraft Carrier (Seaplane) |
| CX |
Armed Mechant Cruiser |
| DD |
Destroyer |
| DE |
Destroyer Escort |
| DM |
Light Minelayer |
| DMS |
Fast Minesweeper (Destroyer) |
| IX |
Unclassified, miscellaneous |
| SM |
Submarine (Mine Laying) |
| SS |
Submarine |
|
| Patrol Craft |
| PB |
Patrol Boat |
| PC |
Submarine Chaser/Corvette |
| PCE |
Patrol Craft (Escort) |
| PCS |
Patrol Craft (Sweeper) |
| PE |
Patrol Craft (Eagle Boat) |
| PF |
Patrol Craft (Frigate) |
| PG |
Patrol Craft (Gun Boat) |
| PGM |
Patrol Craft (Gun Boat Minelayer) |
| PR |
Patrol Craft (River Gunboat) |
| PS |
Patrol Sloop |
| PT |
Patrol Craft (Motor Torpedo Boat) |
| PTC |
Patrol Craft (Motor Torpedo Boat, Submarine Chaser) |
| PY |
Patrol Craft (Small Converted Yacht) |
| PYc |
Patrol Craft (Converted Coastal Yacht) |
| SC |
Submarine Chaser (Wooden Hull) |
| Coast Guard Vessels |
| CGC |
Coast Guard Cutter |
| WAG |
Miscellaneous Auxiliaries |
| WAGL |
Lighthouse Tender |
| WAK |
Cargo SHip |
| WAL |
Lightship |
| WAO |
Oiler |
| WARC |
Cable-Laying Ship |
| WAT |
Oceangoing Tug |
| WIX |
Unclassified Miscellaneous |
| WPC |
Patrol Cutter |
| WPG |
Gun Boat (Cruising Cutter) |
| WPR |
River Gunboat |
| WPY |
Yacht |
| WPYc |
Coastal Yacht |
| WSC |
Submarine Chaser |
| WYP |
District Patrol Vessel |
| WYT |
Yard Tug |
| Merchant Marine |
| XAK |
Cargo Ship, Merchant Marine Manned |
| XAO |
Tanker, Merchant Marine Manned |
| Landing Craft Types |
| LC(FF) |
Landing Craft, Flotilla Flagship |
| LCC |
Landing Craft, Control |
| LCF(L) |
Landing Craft Flak (large)(British) |
| LCG(L) |
Landing Craft Gun (large)(British) |
| LCI |
Landing Craft, Infantry |
| LCI(G) |
Landing Craft, Infantry (Gunboat) |
| LCI(L) |
Landing Craft, Infantry (Large) |
| LCI(M) |
Landing Craft, Infantry (Mortar) |
| LCI(R) |
Landing Craft, Infantry (Rocket) |
| LCM |
Landing Craft, Mechanized |
| LCP(L) |
Landing Craft, Personnel (Large) |
| LCP(R) |
Landing Craft, Personnel (Ramp) |
| LCR(L) |
Landing Craft, Rubber (Large) |
| LCS(L) |
Landing Craft, Support (Large) |
| LCS(S) |
Landing Craft, Support (Small) |
| LCT |
Landing Craft, Tank |
| LCV |
Landing Craft, Vehicle |
| LCVP |
Landing Craft, Vehicle & Personnel |
| LSD |
Landing Ship, Dock |
| LSI(S) |
Landing Ship, Infantry (Small) (British) |
| LSS |
Landing Ship, Stern Chute |
| LSM |
Landing Ship, Medium |
| LSM(R) |
Landing Ship, Medium (Rocket) |
| LST |
Landing Ship, Tank |
| LSV |
Landing Ship, Vehicle |
| LVT |
Landing Vehicle, Tracked |
| LVT(A) |
Landing Vehicle, Tracked (Armored) |
| LVT(G) |
Landing Vehicle, Tracked (Gunboat) |
| LVT(L) |
Landing Vehicle, Tracked (Large) |
| LVT(M) |
Landing Vehicle, Tracked (Mortar) |
| LVT(R) |
Landing Vehicle, Tracked (Rocket) |
|
| Yard and District Craft |
| YA |
Ash Lighter |
| YAG |
District Auxiliary, Miscellaneous |
| YC |
Open Lighter |
| YCD |
Fuelling Barge |
| YCK |
Open Cargo Lighter |
| YCV |
Aircraft Transportation Lighter |
| YD |
Floating Derrick |
| YDD |
District Derrick, Floating |
| YDG |
Degaussing Vessel |
| YDT |
Diving Tender |
| YE |
Ammunition Lighter |
| YF |
Covered Lighter |
| YFB |
Ferry Boat or Launch |
| YFC |
Car Floats |
| YFD |
Floating Dry Dock (Non-Self-Propelled) |
| YFT |
Torpedo Transportation Lighter |
| YG |
Garbage Lighter |
| YH |
Ambulance Boat |
| YHB |
House Boat |
| YHT |
Heating Scow |
| YLA |
Open Landing Lighter |
| YM |
Dredge |
| YMS |
Motor Mine Sweeper |
| YMT |
Motor Tug |
| YN |
Net Tenders (Gate Craft) |
| YNG |
Gate Vessel (Non-Self-Propelled) |
| YNT |
Net Tenders (Tug Class) |
| YO |
Fuel Oil Barge (Self-Propelled) |
| YOG |
Gasoline Barge |
| YOS |
Oil Storage Barge |
| YP |
District Patrol Vessel (“Yippies”) |
| YPD |
Pile Driver (Floating) |
| YPK |
Pontoon Storage Barge |
| YR |
Floating Workshop (Non-Self-Propelled) |
| YRD(H) |
Floating Workshop, Drydock (Hull) |
| YRD(M) |
Floating Workshop, Drydock (Machinery) |
| YS |
Stevadoring Barge |
| YSD |
Seaplane Wrecking Derrick |
| YSP |
Salvage Pontoon |
| YSR |
Sludge Removal Barge |
| YT |
Harbor Tug |
| YTB |
Harbor Tug, Big |
| YTL |
Harbor Tug, Little |
| YTM |
Harbor Tug, Medium |
| YTR |
Harbor Tug, Small |
| YTT |
Torpedo Testing Barges |
| YW |
Water Barge (Self-Propelled) |
| YY |
Motor Boat (General Purpose) |
| Non-Specific |
| M/S |
Motor Ship (civilian vessel — diesel powered) |
| S/S |
Steam Ship (civilian vessel — steam powered) |
| USAT |
United States Army Transport (a US Army vessel) |
| USS |
United States Ship (a US Navy vessel) |
|
