Hull classification symbol
A hull classification symbol, also known as hull code or a registry, is assigned to each and every ship of the UNSC Navy. Different types and sizes of ship have different codes. The hull code is composed of a symbol and a hull number. The hull numbers are usually assigned to each ship consecutively, though number sequences may be skipped for a variety of reasons (planned ships that were never commissioned or bureaucratic maneuvering, for example) and older numbers may be reused for new ships in order to "inherit" the identity of a particular storied vessel.
The symbol is based on the hull classification symbol system used by the United States Navy in the 20th and 21st centuries with a few differences. The symbols have a few things in common: a symbol beginning with "FF" generally denotes a frigate, "DD" a destroyer, "CA" a heavy cruiser, and "CV" a carrier. The rest of the letters vary depending on the type of vessel. There can be dozens of types of each class of vessel.
List of known symbols
- BL: Evacuation craft
- BL-9400493 (BL-9400493)
- DD: Destroyer
- FFG: Frigate
- A - meaning currently unknown.
- C - meaning currently unknown.
- D - meaning currently unknown.
- O - Ordained signifies Forerunner technology incorporated into the vessel.
- P - meaning currently unknown.
- R - Reverence signifies that a ship can conduct reconnaissance missions, and is able to recover Forerunner artifacts.
- S - Salvation signifies that a ship possesses dedicated ship-to-ship combat capability.
- V - meaning currently unknown.
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