Hull classification symbol

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	Hull classification symbol The United States Navy uses hull classification symbols to identify the types of its ships. See also pennant number[?], a somewhat analogous system used by the Royal Navy and some European navies. The combination of symbol and hull number identify a modern Navy ship uniquely. A heavily modified or repurposed ship may receive a new symbol, and either retain the hull number or receive a new one. Also, the system of symbols has changed a number of times since it was introduced in 1907, so ships' symbols sometimes change without anything being done to the physical ship. Many of these symbols are not presently in use.

Warships

Warships are designed to participate in combat operations.

Aircraft Carrier Type

All ships designed primarily for the purpose of conducting combat operations by aircraft which engage in attacks against airborne, surface, sub-surface and shore targets.

CV Multi-purpose Aircraft Carrier
CVA Attack Aircraft Carrier
CVB Battle (large) Aircraft Carrier
CVE Escort aircraft carrier (retired)
CVL Light Aircraft Carrier
CVN Multi-purpose Aircraft Carrier (Nuclear-Propulsion)
CVS Antisubmarine Aircraft Carrier

Surface Combatant Type

Large, heavily armed, surface ships which are designed primarily to engage enemy forces on the high seas.

ACR Armored Cruiser (retired)

BB Battleship (originally just "B")

CA Gun Cruiser (originally just "C")
CAG
CB Battle (large) Cruiser (retired)
CG Guided Missile Cruiser
CGN Guided Missile Cruiser (Nuclear-Propulsion)
CL Light Cruiser
CLAA Antiaircraft Cruiser
CLG
CLK Hunter-Killer Cruiser
CS Scout Cruiser

DD Destroyer
DDG Guided Missile Destroyer
DE Destroyer Escort[?]
DLG
DLGN

FF Frigate
FFG Guided Missile Frigate
FFR Radar Picket Frigate
FFT Frigate (Reserve Training)

Submarine Type

All self-propelled submersible types regardless of whether employed as combatant, auxiliary, or research and development vehicles which have at least a residual combat capability.

SF Fleet Submarine (retired)
SS Submarine
SSK Hunter-Killer Submarine
SSN Submarine (Nuclear-Powered)
SSBN Ballistic Missile Submarine (Nuclear-Powered)
SSGN Guided (Cruise) Missile Submarine (Nuclear-Powered)
SSRN
SST Training Submarine

Combatants whose mission may extend beyond coastal duties and whose characteristics include adequate endurance and sea keeping providing a capability for operations exceeding 48 hours on the high seas without support.

PG Patrol Combatant

Amphibious Warfare Type

All ships having organic capability for amphibious assault and which have characteristics enabling long duration operations on the high seas.

LHA Amphibious Assault Ship (General Purpose)
LHD Amphibious Assault Ship (Multi-Purpose)
LPD Amphibious Transport Dock
LPH Amphibious Assault Ship (Helicopter)
LKA Amphibious Cargo Ship

LSD Dock Landing Ship
LSM Medium Landing Ship
LST Tank Landing Ship

LCC Amphibious Command Ship

Combat Logistics Type

Ships which have the capability to provide underway replenishment to fleet units.

AE Ammunition Ship
AFS Combat Store Ship
AO Oiler
AOE Fast Combat Support Ship
AOR Replenishment Oiler

Mine Warfare Type

All ships whose primary function is mine warfare on the high seas.

MSO Minesweeper - Ocean

MCM Mine Countermeasures Ship
MCS Mine Countermeasures Support Ship
MHC Minehunter, Coastal

Coastal Defense Type

All ships whose primary function is coastal patrol and interdiction.

PC Patrol, Coastal

Mobile Logistics Type

Ships which have the capability to provide direct material support to other deployed units operating far from home base.

AD Destroyer Tender
AR Repair Ship
AS Submarine Tender

Support Ships

Support ships are not designed to participate in combat, and are generally not armed.

Support Type

A grouping of ships designed to operate in the open ocean in a variety of sea states to provide general support to either combatant forces or shore based establishments. (Includes smaller auxiliaries which by the nature of their duties, leave inshore waters).

ARS Salvage Ship
ASR Submarine Rescue Ship
ATA Auxiliary Ocean Tug
ATF Fleet Ocean Tug
ATS Salvage and Rescue Ship

ACS Auxiliary Crane Ship
AG Auxiliary General
AGDS Deep Submergence Support Ship
AGER Environmental Research Ship
AGF Miscellaneous Command Ship
AGM Missile Range Instrumentation Ship
AGOR Oceanographic Research Ship
AGOS Ocean Surveillance Ship
AGS Surveying Ship
AGSS Auxiliary Research Submarine
AH Hospital Ship
AK Cargo Ship
AKR Vehicle Cargo Ship
AOG Gasoline Tanker
AOT Transport Oiler
AP Transport
APD High Speed Transport
ARC Cable Repair Ship
AVB Aviation Logistics Support Ship
AVT Auxiliary Aircraft Landing Training Ship

Service Type Craft

A grouping of navy-subordinated craft (including non-self-propelled) designed to provide general support to either combatant forces or shore-based establishments.

AFDB Large Auxiliary Floating Dry Dock

AFDL Small Auxiliary Floating Dry Dock
AFDM Medium Auxiliary Floating Dry Dock
ARD Auxiliary Repair Dry Dock
ARDM Medium Auxiliary Repair Dry Dock
YFD Yard Floating Dry Dock

YTB Large Harbor Tug
YTL Small Harbor Tug
YTM Medium Harbor Tug

YO Fuel Oil Barge
YOG Gasoline Barge
YW Water Barge

YF Covered Lighter
YFR Refrigerated Cover Lighter
YFU Harbor Utility Craft
YG Garbage Lighter

YC Open Lighter
YCF Car Float
YCV Aircraft Transportation Lighter
YFN Covered Lighter
YFNB Large Covered Lighter
YFNX Lighter (Special purpose)
YFRN Refrigerated Covered Lighter
YFRT Range Tender
YGN Garbage Lighter
YOGN Gasoline Barge
YON Fuel Oil Barge
YOS Oil Storage Barge
YSR Sludge Removal Barge
YWN Water Barge

DSRV Deep Submergence Rescue Vehicle
DSV Deep Submergence Vehicle
NR Submersible Research Vehicle
YFB Ferry Boat or Launch
YM Dredge
YP Patrol Craft, Training
YSD Seaplane Wrecking Derrick
YTT Torpedo Trials Craft

APL Barracks Craft
YD Floating Crane
YDT Diving Tender
YFND Dry Dock Companion Craft
YFP Floating Power Barge
YLC Salvage Lift Craft
YMN Dredge
YNG Gate Craft
YPD Floating Pile Driver
YR Floating Workshop
YRB Repair and Berthing Barge
YRBM Repair, Berthing and Messing Barge
YRDH Floating Dry Dock Workshop (Hull)
YRDM Floating Dry Dock Workshop (Machine)
YRR Radiological Repair Barge
YRST Salvage Craft Tender

IX Unclassified Miscellaneous Unit
X Submersible Craft

The USS Constitution, formerly IX 21, was reclassified to none, effective September 1, 1975.

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