Hull classification symbol

The Hull Classification Symbol is placed on each and every UNSC ship. Different types and sizes of ship have different classification symbols. Placed after the symbol is a number. Each ship of that class gets a different number. This way, the Hull Classification Symbol is a sort of numerical identification system for ships, other than their names.

The symbol is based off of a system of the same name used by the ancient United States Navy. The symbols have a few things in common, a symbol beginning with "FF" generally denotes a Frigate, "DD" a Destroyer, "C" a Cruiser or Carrier, and "B" a Battleship. The rest of the letters vary depending on the type of vessel. There can be dozens of types of each class of vessel.

Symbols

 * CFV: Phoenix-class ships
 * UNSC Spirit of Fire (CFV-88)


 * DDA: Freighters
 * UNSC Onan (DDA-147)


 * FFG: Guided Missile Frigates
 * UNSC In Amber Clad (FFG-142)


 * ODA: Orbital Defense Platforms
 * Cairo Station (ODA-142)
 * Malta Station (ODA-143)
 * Athens Station (ODA-144)