Petty officer third class

Petty Officer Third Class is the fourth enlisted rank in the UNSC Navy, just above crewman and below Petty Officer Second Class, and is the lowest form of non-commissioned officer. Petty Officer Third Class is the naval equivalent to a Corporal in the Marines.

Known Petty Officers Third Class

 * Petty Officer Third Class Pauley
 * Petty Officer Third Class Cho
 * Tech Officer Sam Marcus