to be assigned to Lieutenant/O-3E and below requirements only. LCDR/O-4 and above billets are assigned the appropriate 18XX designator. (7xxx) Warrant Officers Officers of the line, or staff, as appropriate by their career field, of the Regular Navy and Navy Reserve appointed to chief warrant officer for the performance of duty in the technical fields indicated by former enlisted rating groups. Line Chief Warrant Officers (by Community) Staff Corps Chief Warrant Officers (by Community) Line Chief Warrant Officers (Information Warfare Community) See also United States Navy officer rank insignia List of United States Navy staff corps Uniforms of the United States Navy Badges of the United States Navy U.S. Navy Midshipman rank insignia can be found in the Midshipman article. U.S. Navy Warrant officer rank insignia can be found in the Warrant Officer (United States) article. List of United States Navy enlisted warfare designations United States Navy enlisted rate insignia List of United States Navy ratings Navy Enlisted Classification References United States Navy job titles Designators list