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YAG Yttrium Aluminum Garnet
YAGE Experimental Service Craft
YAM Missile Support Craft
YAMM Missile Support Barge
YC Open Barge
YCF Car Barge
YCK Lighter Open Cargo
YCV Lighter Aircraft Transport
YD Floating Crane
YDG Deperming/Degaussing Barge
YDT Diving Tender
YE Ammunition Lighter
YEN Ammunition Barge
YF Covered Lighter
YFB Ferry
YFDB Large Floating Drydock
YFDL Small Floating Drydock
YFDM Medium Floating Drydock
YFL Launch
YFN Covered Barge
YFNB Large Covered Barge
YFND Drydock Companion Barge
YFP Floating Power Barge
YFR Refrigerated Lighter
YFRN Refrigerated Barge
YFU Harbor Utility Transport
YG Garbage Lighter
YGN Garbage Barge
YGS Survey Craft
YGT Target Service Craft
YGTN Target Barge
YH Ambulance Craft
YM Dredge
YMN Non-Self-Propelled Dredge
YNC Net Cargo Craft
YNG Gate Craft
YO Fuel Lighter
YON Fuel Barge
YOS Oil Storage Barge
YOSR Nuclear Waste Disposal Barge
YOSS Submersible Oil Storage Barge
YPD Floating Pile Driver
YPL Barracks Barge
YPT Torpedo Retriever
YR Floating Workshop Barge
yr Year
YRC Cable Tender
YRD Auxiliary Repair Dock
YRG Tank Cleaning Craft
YRRN Radiological Repair Barge
YRS Salvage Craft
YSR Sludge Removal Craft
YSS Service Submersible
YTB Large Harbor Tug
YTL Small Harbor Tug
YTM Medium Harbor Tug
YTR Fireboat
YTS Sail Training Craft
YVS Seaplane Service Craft
YW Water Lighter
YWN Water Barge
YXR Hulk or Relic
YXT Training Craft