Editing Master chief petty officer

{{UNSC Rank Infobox
|name=Master Chief Petty Officer
|image=
|species=[[Human]]
|weapons=Any available
|equipment=Any available
|vehicles=Any available
|missions=Nearly all
|role=Commander
|notable=[[SPARTAN-117]]
|affiliation=[[United Nations Space Command]], [[UNSC Navy]]
}}

'''Master Chief Petty Officer''' is the ninth, and highest enlisted rank of the UNSC Navy, and is a [[non-commissioned officer]]. It is equal in rank to [[Master Gunnery Sergeant]] and [[Sergeant Major]] in the [[UNSC Marine Corps]]. 
[[Image:Masuer_Chief.jpg|149px|left|thumb|The only known Master Chief Petty Officer, SPARTAN-117.]]

In informal settings, Master Chief Petty Officers are typically called "Master Chief" or "Chief".

The protagonist of the '''''Halo''''' series, [[John-117|"Master Chief"]], is named for his rank of Master Chief Petty Officer.
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{{Navy Enlisted Ranks}}
[[Category:Ranks]]