Hull classification symbol

A hull classification symbol, also known as a hull code, hull number, or registry, is an identification system used by all allied forces of the United Earth Government, which includes the UNSC Navy, planetary defence forces, and civilian shipping authorities. Its purpose is to easily distinguish unique vessels of similar type, as well as convey general information and capabilities each vessel would possess.

Warships

 * BB: Battleship
 * C: Cruiser
 * CA: Heavy cruiser
 * CB: Battlecruiser
 * CBC: Large command cruiser
 * CC: Command cruiser
 * CL: Light cruiser
 * CV: Carrier
 * CVA: Heavy carrier
 * CVB: Supercarrier
 * CVL: Light carrier
 * CVE: Escort carrier
 * CFV: Assault ship
 * DD: Destroyer
 * DDH: Heavy destroyer
 * DDL: Light destroyer
 * DL: Destroyer leader
 * FF: Frigate
 * FFE: Escort frigate
 * FFG: General-purpose frigate
 * FS: Corvette
 * GB: Gunboat
 * PRO: Prowler
 * PRF: Fleet prowler
 * PRM: Minelaying prowler
 * PRS: Subprowler
 * XI: Unclassified miscellaneous unit

Auxiliary support ships

 * AE: Ammunition ship
 * AH: Hospital ship
 * AS: Prowler tender
 * AP: Transport
 * AOR: Replenishment ship
 * AR: Repair ship
 * YRB: Mobile refit station