Auxiliaries

AB Crane Ship (later changed to ACS)
AC Collier (coaling ship)
ACS Crane Ship
AD Destroyer Tender
ADC Dry Cargo Replenishment Ship
ADG Degaussing Vessel
AE Ammunition Ship
AF Refrigerated Stores Ship
AFDB Large Floating Drydock
AFDL Small Floating Drydock
AFDM Medium Floating Drydock
AFS Combat Stores Ship
AG Auxiliary, Generic/General (miscellaneous) use
AGB Icebreaker
AGD Seagoing Dredger
AGDE Experimental Destroyer Escort
AGDS Deep Submergence Support Ship
AGEH Hydrofoil Research Ship
AGER Experimental Research Ship
AGF Fleet Flagship
AGFF Experimental Frigate
AGH Helicopter Support Ship
AGI Intelligence Gathering Ship
AGL Lighthouse Tender
AGM Missile Range Instrumentation Ship
AGMR Communications Major Relay Ship
AGOR Oceanographic Research Ship
AGOS Ocean Surveillance Ship
AGP Patrol Craft Tender
AGR Radar Picket Ship (converted cargo ship)
AGS Surveying Ship
AGSc Surveying Ship, Coastal
AGTR Technical Research Ship
AH Hospital Ship
AHR Hospital Ship, Riverine
AK Cargo Ship
AKA Cargo Ship, Attack
AKD Cargo Ship, Dock
AKE Dry Cargo Ship
AKL Light Cargo Ship
AKN Net Cargo Ship
AKR Cargo Ship, Roll-on/Roll-off
AKS General Stores-issue Ship
AKV Aircraft Cargo Ship or Ferry
AN Net Laying (Net Tender) Ship
ANL Net Laying (Net Tender) Ship
AO Fleet Oiler
AOE Fast Combat Support Ship
AOG Gasoline Tanker
AOL Small Oiler
AOR Replenishment Oiler
AORL Small Replenishment Oiler
AOT Transport Oiler
AP Personnel Transport Ship
APA Attack Personnel Transport Ship
APB Barracks Ship, Self-propelled
APC Coastal Transport
APD Troop Transport (High Speed)
APH Troop Transport, Hospital
APL Floating Barracks
APM Mechanized Artillery Transport
APR Rescue Transport
APV Aircraft Transport
AR Repair Ship
ARB Repair Ship, Battle Damage
ARC Repair Ship, Cable
ARG Repair Ship, Internal Combustion Engine
ARD Repair Dock
ARDM Medium Repair Dock
ARL Repair Ship, Landing Craft
ARS Salvage Ship
ARSD Salvage Ship, Lifting Vessel
ARST Salvage Ship, Tender
ARV Aircraft Repair Ship
ARVA Aircraft Airframe Repair Ship
ARVE Aircraft Engine Repair Ship
AS Submarine Tender
ASE Submarine Ammunition Ship
ASR Submarine Rescue Vessel
ATA Auxiliary Ocean Tug
ATF Fleet Tug
ATGB Large Icebreaking Tug
ATR Rescue Tug
ATS Salvage Tug
AV Seaplane Tender
AVB Aviation Logistics Support Ship
AVC Catapult Lighter
AVD Aviation Tender (Converted Destroyer)
AVP Small Seaplane Tender
AVS Aviation Supply Ship
AVT Auxiliary Aircraft Transport
AW Distilling Ship
AWK Water Tanker
AX Training Vessel (Current meaning)
Auxiliary Tender, Large (Former meaning)
AXS Sail Training Vessel
AY VIP Yacht (Current meaning)
Auxiliary Tender, Small (Former meaning)
AZ Aerostat Tender
FDL Fast Deployment Logistics Ship