Ratings should not be confused with "rates", which describe the Navy's enlisted pay-grades and ratings. Enlisted service members (sailors) are referred to by their rating and pay-grade. For example, if a sailor has the pay-grade of E-5 (petty officer second class) and the rating of boatswain's mate, then combining the two—boatswain's mate second class (BM2)—defines both pay-grade and rating in formal address or epistolary salutation. Thus, boatswain's mate second class (BM2) would be that sailor's 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.