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, "CC" a Cruiser, "CV" a Carrier, and "BB" 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)
  • UNSC Forward Unto Dawn (FFG-201)
  • UNSC Aegis Fate (FFG-301)

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