A non-commissioned officer (NCO) is a military officer who does not hold a commission. Non-commissioned officers usually earn their position of authority by promotion through the enlisted ranks. In contrast, commissioned officers usually enter directly from a military academy, officer training corps (OTC) or reserve officer training corps (ROTC), or officer candidate school (OCS) or officer training school (OTS), after receiving a post-secondary degree.
Jeremy Michael Boorda was a United States Navy admiral who served as the 25th Chief of Naval Operations. Boorda is notable as the first person to have risen from the enlisted ranks to become Chief of Naval Operations, the highest-ranking billet in the United States Navy.
An officer candidate school (OCS) is a military school which trains civilians and enlisted personnel in order for them to gain a commission as officers in the armed forces of a country. How OCS is run differs between countries and services. Typically, officer candidates have already attained post-secondary education, and sometimes a bachelor's degree, and undergo a short duration of training which focuses primarily on military skills and leadership. This is in contrast with a military academy which includes academic instruction leading to a bachelor's degree.
A midshipman is an officer of the lowest rank, in the Royal Navy, United States Navy, and many Commonwealth navies. Commonwealth countries which use the rank include Canada, Australia, Bangladesh, Namibia, New Zealand, South Africa, India, Pakistan, Singapore, Sri Lanka, and Kenya.
A drill instructor is a non-commissioned officer in the armed forces, fire department, or police forces with specific duties that vary by country. Foot drill, military step, and marching are typically taught by drill instructors.
The Basic School (TBS) is where all newly commissioned and appointed United States Marine Corps officers are taught the basics of being an "Officer of Marines." The Basic School is located in Stafford County, Virginia to the south-west of the Marine Corps Base Quantico complex. Each year, over 1,700 new officers are trained, representing such commissioning sources as the U.S. Naval Academy, Navy ROTC, Officer Candidates School, and Marine Corps Limited Duty Officer (LDO) and Warrant Officer, U.S. Merchant Marine Academy accession programs.
Officer candidate or officer aspirant (OA) is a rank in some militaries of the world that is an appointed position while a person is in training to become an officer. More often than not, an officer candidate was a civilian who applied to join the military directly as an officer. Officer candidates are, therefore, not considered of the same status as enlisted personnel.
The United States Navy Reserve (USNR), known as the United States Naval Reserve from 1915 to 2005, is the Reserve Component (RC) of the United States Navy. Members of the Navy Reserve, called Reservists, are categorized as being in either the Selected Reserve (SELRES), the Training and Administration of the Reserve (TAR), the Individual Ready Reserve (IRR), or the Retired Reserve.
The Naval Reserve Officer Training Corps (NROTC) program is a college-based, commissioned officer training program of the United States Navy and the United States Marine Corps.
The United States Marine Corps Officer Candidates School (OCS) is a training regiment designed to screen and evaluate potential Marine Corps Officers. Those who successfully complete the period of instruction are commissioned as Second Lieutenants in the United States Marines. Unlike the other United States military services, the majority of Marine Corps officers complete OCS to earn a commission; the exceptions are midshipmen from the United States Naval Academy, limited duty officers and warrant officers, and inter-service transfers. It is located at Marine Corps Base Quantico.
The Naval Education and Training Command (NETC) is an enterprise-level shore command of the United States Navy with more than 19,000 military and staff personnel at more than 1,640 subordinate activities, sites, districts, stations, and detachments throughout the world. NETC recruits, trains and delivers those who serve the nation, taking them from "street to fleet" by transforming civilians into highly skilled, operational, and combat ready warfighters.
A naval aviator is a commissioned officer or warrant officer qualified as a crewed aircraft pilot in the United States Navy or United States Marine Corps. United States Coast Guard crewed aircraft pilots are officially designated as "Coast Guard aviators", although they complete the same undergraduate flight training as Navy and Marine Corps crewed aircraft pilots, and are awarded the same aviation breast insignia.
The United States Navy's Officer Candidate School provides initial training for officers of the line and select operational staff corps communities in the United States Navy. Along with United States Naval Academy (USNA) and Naval Reserve Officer Training Corps (NROTC), OCS is one of three principal sources of newly commissioned naval officers.
In the United States Armed Forces, the ranks of warrant officer are rated as officers above all non-commissioned officers, candidates, cadets, and midshipmen, but subordinate to the lowest officer grade of O‑1. This application differs from the Commonwealth of Nations and other militaries, where warrant officers are the most senior of the other ranks, equivalent to the U.S. Armed Forces grades of E‑8 and E‑9.
A direct commission officer (DCO) is a United States uniformed officer who has received an appointed commission without the typical prerequisites for achieving a commission, such as attending a four-year service academy, a four-year or two-year college ROTC program, or one of the officer candidate school or officer training school programs, the latter OCS/OTS programs typically slightly over three months in length.
The Marine Forces Reserve, also known as the United States Marine Corps Reserve (USMCR) and the U.S. Marine Corps Forces Reserve, is the reserve force of the United States Marine Corps. It is the largest command, by assigned personnel, in the U.S. Marine Corps. Marines in the Reserve go through the same training and work in the same Military Occupational Specialties (MOS) as their active-duty counterparts. The United States Marine Corps Reserve was established when Congress passed the Naval Appropriations Act of 29 August 1916, and is responsible for providing trained units and qualified individuals to be mobilized for active duty in time of war, national emergency, or contingency operations.
The US Navy had four programs for the training of naval aviators.
The United States Navy has nearly 500,000 personnel, approximately a quarter of whom are in ready reserve. Of those on active duty, more than eighty percent are enlisted sailors, and around fifteen percent are commissioned officers; the rest are midshipmen of the United States Naval Academy and midshipmen of the Naval Reserve Officer Training Corps at over 180 universities around the country and officer candidates at the navy's Officer Candidate School.
An officer is a person who holds a position of authority as a member of an armed force or uniformed service.
The Naval Service Training Command (NSTC) is a one-star echelon III command of the United States Navy that is responsible to the Chief of Naval Education and Training for the indoctrination and training of all new accessions into the Naval Service, with the exception of Midshipmen who access through the United States Naval Academy. This includes all new recruits through Recruit Training Command, the Navy's only enlisted recruit training location and all Officer "Candidates" who are seeking a commission through the Officer Training Command at Naval Station Newport, Rhode Island. Also under its purview is the operation of the various Naval Reserve Officers Training Corps (NROTC) units in universities across the country.
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CAPT Everett M. Alcorn 
