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Home > Hull classification symbol


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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.

The 1975 ship reclassification of cruisers, frigates, and ocean escorts brought US Navy classifications into line with other nations' classifications, and eliminated the perceived "cruiser gap" with the Soviet Navy.

1 Warships

Warships are designed to participate in combat operations.

1.1 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" is from the original description, "Cruiser, Aviation" -- CA was already in use for "Cruiser, Armored".

1.2 Surface Combatant Type

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

A word about the DE type symbol is in order here. There were two distinct breeds of DE, the World War II Destroyer Escorts (some of which were converted to DERs) and the postwar DE/DEG classes, which were known as Ocean Escorts despite carrying the same type symbol as the WWII Destroyer Escorts. All DEs, DEGs, and DERs were reclassified as FFs, FFGs, or FFRs, 30 June 1975.

The DL category was established in 1951 with the abolition of the CLK category. CLK 1 became DL 1 and DD 927-930 became DL 2-5. By the mid-1950s the term Destroyer Leader had been dropped in favor of Frigate. Most DLGs and DLGNs were reclassified as CGs and CGNs, 30 June 1975. However, DLG 6-15 became DDG 37-46. The old DLs were already gone by that time.

The FF, FFG, and FFR designations were established 30 June 1975 as new type symbols for ex-DEs, DEGs, and DERs.



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