United States Navy ratings are general enlisted occupations used by the U.S. Navy from the 18th century, which consisted of specific skills and abilities. Each naval rating had its own specialty badge, which is worn on the left sleeve of the uniform by each enlisted person in that particular field. Working uniforms, such as camouflage Battle Dress Uniforms, utilities, coveralls, and Naval Working Uniform, bear generic rate designators with no rating insignia. For a brief period from September 2016 to December 2016, ratings were not used. However, they were reintroduced in December 2016 and remain in use.
Just as a naval officer has rank, not a rate, an officer's occupation (if drawn more narrowly than an officer of the line) is classified according to designators for both officers of the line (e.g., line officers) and those of the professional staff corps.
Ratings should not be confused with rates, which describe the Navy's enlisted pay-grades and ratings. Enlisted sailors are referred to by their rating and pay-grade. For example, if someone's pay-grade is E-5 (Petty Officer 2nd Class) and his rating is Boatswain's Mate, then combining the two—Boatswain's Mate 2nd Class (BM2)—defines both pay-grade and rating in formal address or epistolary salutation. Thus, Boatswain's Mate 2nd Class (BM2) would be his rate. A member that is E-1, E-2, or E-3 that belongs to a general occupational field (airman, constructionman, fireman, hospitalman, or seaman) is considered nonrated. A striker is a nonrated person who is working for promotion towards a specific rating. Example: BMSN, MMFA, AOAR.