| AFDB | Auxiliary Floating Drydock, Large |
| AFDL | Auxiliary Floating Drydock, Small |
| AFDM | Auxiliary Floating Drydock, Medium |
|
APL
|
Barracks Craft
|
|
APL(L)61
|
Berthing Barge
|
| ARD | Auxiliary Repair Drydock |
|
ARDM
|
Auxiliary Repair Drydock, Medium
|
|
IX
|
Unclassified Miscellaneous
|
|
SWOB
|
Ship Waste Off-Loading
Barge
|
|
YC
|
Open Lighter
|
| YCF | Car Float |
|
YCV
|
Open Lighter
|
|
YD
|
Floating Crane
|
|
YDT
|
Diving Training Boat
|
|
YF
|
Freight Lighter
|
|
YFB
|
Ferry Boat
|
| YFD | Yard Floating Drydock |
|
YFN
|
Steel Covered Lighter
|
|
YFNB
|
Steel Covered Lighter
|
| YFND | Drydock Companion Craft |
|
YFNX
|
Special Purpose Barge
|
|
YFP
|
Power Barge
|
| YFRT | Covered Lighter (range-tender) |
|
YFU
|
Harbor Utility Craft
|
|
YGN
|
Dump Scow
|
|
YLC
|
Salvage Lift Barge
|
| YM | Dredge |
| YMN | Dredge |
|
YNG
|
Gate Vessel
|
| YOG | Gasoline Barge |
|
YOGN
|
Liquid Cargo Barge
|
|
YON
|
Liquid Cargo Barge
|
|
YOS
|
Oil Storage Barge
|
|
YP
|
Patrol Craft
|
| YPD | Floating Pile Driver |
|
YR
|
Repair Barge
|
|
YRB
|
Repair and Berthing Barge
|
|
YRBM
|
Berthing Barge
|
|
YRDH
|
Hull Workshop
|
|
YRDM
|
Hull Machinery Workshop
|
|
YRR
|
Radiological Repair Barge
|
| YRST | Salvage Craft Tender |
|
YSD
|
Seaplane Wrecking Derrick
|
|
YSR
|
Sludge Removal Barge
|
|
YTB
|
Harbor Tug
|
|
YTL
|
Harbor Tug
|
| YTM | Medium Harbor Tug |
| YTT | Torpedo Trials Craft |
|
YWN
|
Liquid Cargo Barge
|
