

The Navy of the United Colonies of the 1775 era offered only a few different jobs above the level of ordinary seaman. Navy's enlisted occupational system was a product of more than 200 years of Naval evolution. Main article: History of United States Navy ratings Naval Officers: Although naval officers do specialize in various fields their occupations are classified according to designators for both officers of the line (e.g., line officers) and those of the professional staff corps. A Sailor actively working toward a specific rating is referred to as "striking for a rating" and is called a "striker". They are instead divided into five general occupational fields (airman, constructionman, fireman, hospitalman, or seaman).

Sailors from pay-grades E-1 to E-3 have no rates and are considered to be in apprenticeships or training for a rating, thus the slang term "undes" (un-designated) when referring to them as a group. Thus, boatswain's mate second class (BM2) would be that sailor's rate. For example, if a sailor has the pay-grade of E-5 (rank of petty officer second class) and the rating of boatswain's mate, then combining the two-boatswain's mate second class (BM2)-defines both rank and rating in formal address or epistolary salutation. Enlisted service members (sailors) are often referred to by a combination of both their rating and their pay-grade. Ratings should not be confused with ranks, which describe the Navy's enlisted rank and pay-grades. naval ratings are the equivalent of military occupational specialty codes (MOS codes) used by the United States Army and the United States Marine Corps, the ratings system used by the United States Coast Guard, and Air Force Specialty Codes (AFSC) used by the United States Air Force and United States Space Force. Each naval rating has its own specialty badge, which is worn on the left sleeve of dress uniforms of enlisted personnel. Navy since the 18th century, which denote the specific skills and abilities of the sailor. United States Navy ratings are general enlisted occupations used by the U.S. See also: List of United States Navy enlisted rates From left to right: the service dress blue rating badge for a special warfare operator first class and a boatswain's mate second class.
