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Navy Ranks

Enlisted
An enlisted rank in the Navy of the United States is any rank below a commissioned officer. The term can also be inclusive of noncommissioned officers. In most cases, enlisted service personnel perform jobs specific to their own occupational specialty, as opposed to the more general command responsibilities of commissioned officers.
Seaman Recruit
Seaman Apprentice
Seaman
Petty Officer Third Class
Petty Officer Second Class
Petty Officer First Class
Cheif Petty Officer
Senior Chief Petty Officer
Master Chief Petty Officer
Master Chief Petty Officer of the Navy

Officer
An officer is a member of an armed force who holds a position of responsibility. Commissioned officers derive authority directly from a sovereign power and, as such, hold a commission charging them with the duties and responsibilities of a specific office or position. Commissioned officers are typically the only persons in a military environment able to act as the commanding officer (according to the most technical definition of the word) over a military unit.
Ensign
Lieutenant Junior Grade
Lieutenant
Lieutenant Commander
Commander
Captain
Rear Admiral (Lower Half)
Rear Admiral (Upper Half)
Vice Admiral
Admiral
Fleet Admiral

Warrant Officer
In the Navy, Warrant Officers have traditionally been the technical experts whose skills and knowledge were an essential part of the proper operation of the ship. Navy CWOs serve in 30 specialties covering 5 categories. Navy Chief Warrant Officers are technical officer specialists who perform duties that require expertise and commissioned officer authority to direct technical operations in a given occupational area. Chief Warrant Officers should not be confused with Limited Duty Officers. They perform duties that are technically oriented, that is, requiring skills directly related to previous enlisted service and specialized training, while not significantly affecting their ability to perform those duties through advancement to other duty positions and responsibilities—--allowing the Navy to capitalize on their experience. Sailors must have been a senior non-commissioned officer (E-7 through E-9) to gain the commission.
Chief Warrant Officer 2
Cheif Warrant Officer 3
Chief Warrant Officer 4
Cheif Warrant Officer 5