The U.S. Navy's enlisted occupational system was a product of more than 200 years of Naval evolution. The Navy of the United Colonies of the 1775 era offered only a few different jobs above the level of ordinary se… See more

The pay grades E-4 (petty officer third class) through E-9 (master chief petty officer) fall within the rating structure. It is further broken down into four types of ratings and classifications:
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I^ : ABE, ABF, and ABH combine at paygrade E-9 to the rate of Master Chief Aviation Boatswain's Mate (ABCM). II^ : AM and AME combine at paygrade E-8 to the rate of Senior Chief Structural Mechanic (AMCS); A… See more