Hull classification symbol (Earth-5875)

A hull classification symbol (HCS) is a letter/numerical code assigned to every ship of the UNSC Navy and civilian vessels. Different types and classes of ship are given different classification symbols.

These numbers are assigned consecutively to each sequences, but may be skipped duo to bureaucratic maneuvering. The symbols are based upon the hull classification symbol system employed by the United States Navy during the 10th and 21st centuries, with minor differences.

Trivia

 * Hull classification symbol on Wikipedia.