Additionally, line officers wear a star above the stripes of the shoulder boards or sleeves but staff and warrant officers wear specialty insignia.
* The rank of Fleet Admiral has been reserved for war time use only. The last Fleet Admirals were in World War II. Fleet Admirals during that war were Chester W. Nimitz, William D. Leahy, Ernest J. King, and William F. Halsey.
* The grade of Warrant Officer (W-1) is no longer in use. W-5 was established in the Navy in 2002.