Admiral

Admiral is a senior commissioned officer rank of the UNSC Navy. It is the only rank below Fleet Admiral, the highest known UNSC Navy rank.

Title
While Admiral is a rank of its own, the title "Admiral" is often used to refer to any of the flag officer ranks of the UNSC Navy:
 * Fleet Admiral
 * Admiral
 * Vice Admiral
 * Rear Admiral (Upper Half)
 * Rear Admiral (Lower Half)

Due to the ambiguity of the title "Admiral", Admirals are often known as a "Four Star Admiral" or "Full Admiral" to distinguish it from subordinate ranks of Admiral. The term "Four Star Admiral" comes from the rank insignia worn on the uniform.