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Learn how the US Navy assigns and identifies its officers by four-digit codes based on their education, training, and assignments. Find out the meanings of the first, second, and third digits, and the different officer communities such as Line, Staff, Limited Duty, and Warrant.
Learn about the history, structure, and types of U.S. Navy ratings, which are general enlisted occupations that denote the skills and abilities of sailors. Find out how ratings differ from ranks, which describe the Navy's enlisted rank and pay-grades.
Learn about the history, mission, organization and roles of the Navy Reserve, a component of the U.S. Navy. The Navy Reserve consists of officers and enlisted personnel who serve in various capacities, from operational units to administrative support, in peacetime and war.
Learn about the U.S. Navy and Marine Corps units that train naval aviators and aircrew on specific aircraft types. Find out the current and historical FRSs, their insignia, squadron designations, and aircraft wings.
Learn about the different types of warfare designations that US Navy sailors can earn, such as Aviation, Surface, Undersea, Special Operations, and more. See the list of designators, insignia, and qualifications for each warfare community.
This web page provides a complete list of 278 four-star admirals in the history of the U.S. Navy, with their dates of rank, positions, years of service, and sources of commission. It also explains the different paths to become a four-star admiral and the history of the rank.
Learn about the ranks and insignia of commissioned and warrant officers in the U.S. Navy, from fleet admiral to ensign. See the pay grades, NATO codes, and uniform insignia for each rank category.
Read user reviews and ratings on the effectiveness, ease of use, and satisfaction of naltrexone oral, a drug used to treat alcohol and opioid dependence. See positive and negative experiences, side effects, and tips from people who have taken naltrexone oral.