Phonetic alphabet

The phonetic alphabet is a system of spelling alphabet used by the United Nations Space Command, derived from the NATO phonetic alphabet. It is used, most commonly by the military, to spell parts of a message containing letters and numbers to avoid confusion that may arise from phonetically similar letters, especially if static or other interference is present.

Uses

 * Pelican dropships are identified by a serial number consisting of one letter from the phonetic alphabet and three numbers. Examples: Echo 419, Victor 933, Bravo 022, Kilo 023.
 * Fireteams are distinguished by phonetic letters. Example: Fireteam Zulu.
 * Bumblebee lifepods have serial numbers using three letters from the phonetic alphabet.
 * Marines use them in place of abbreviations in the field for weapons, vehicles, units, and sometimes common sayings.
 * Covenant forces are called "Echo Tango" (E.T.) in battle, which is often shortened to just "Tango". "Tango" could also mean "target."
 * A nickname for Brutes is "Baby Kong." Marines often say "Bravo-Kilo" instead, usually in interviews or testimonials.
 * "Oscar Mike" means "On the move."
 * "Mike-Foxtrot" is a euphemism for "motherfucker."
 * "Charlie-Foxtrot" is a euphemism for "cluster fuck".
 * Spartans are often referred to as "Sierras" by themselves and other UNSC personnel.
 * Dr. Catherine Halsey is sometimes referred to by the phonetic value of her initials, "Charlie Hotel".