Hull classification symbol

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Ships of the United States Navy
Ships in current service
Current ships
Ships grouped alphabetically
A–B C D–F G–H I–K L M N–O P Q–R S T–V W–Z
Ships grouped by type
Aircraft carriers Airships Amphibious warfare ships Auxiliaries Battlecruisers Battleships Cruisers Destroyers Destroyer escorts Destroyer leaders Escort carriers Frigates Hospital ships Littoral combat ships Mine warfare vessels Monitors Oilers Patrol vessels Registered civilian vessels Sailing frigates Steam frigates Steam gunboats Ships of the line Sloops of war Submarines Torpedo boats Torpedo retrievers Unclassified miscellaneous Yard and district craft
v t e

The United States Navy, United States Coast Guard, and United States National Oceanic and Atmospheric Administration (NOAA) use a hull classification symbol (sometimes called hull code or hull number) to identify their ships by type and by individual ship within a type. The system is analogous to the pennant number system that the Royal Navy and other European and Commonwealth navies use.