Warrant officer (WO) is a rank or category of ranks in the armed forces of many countries. Depending on the country, service, or historical context, warrant officers are sometimes classified as the most junior of the commissioned officer ranks, the most senior of the non-commissioned officer (NCO) ranks, or in a separate category of their own. Warrant officer ranks are especially prominent in the militaries of Commonwealth nations and the United States.
The Royal Fleet Auxiliary (RFA) is a naval auxiliary fleet owned by the UK's Ministry of Defence. It is a component of His Majesty's Naval Service and provides logistical and operational support to the Royal Navy and Royal Marines. The RFA ensures the Royal Navy is supplied and supported by providing fuel and stores through replenishment at sea, transporting Royal Marines and British Army personnel, providing medical care and transporting equipment and essentials around the world. In addition the RFA acts independently providing humanitarian aid, counter piracy and counter narcotic patrols together with assisting the Royal Navy in preventing conflict and securing international trade. They are a uniformed civilian branch of the Royal Navy staffed by British merchant sailors. The RFA is one of five RN fighting arms.
A petty officer (PO) is a non-commissioned officer in many navies. In many nations, they are typically equal to a sergeant in comparison to other military branches. Often they may be superior to a seaman, and subordinate to more senior non-commissioned officers, such as a chief petty officers.
Chief Warrant officer is a senior warrant officer rank, used in many countries.
Captain General Royal Marines is the ceremonial head of the Royal Marines. The current Captain General is King Charles III. This position is distinct from that of the Commandant General Royal Marines, the professional head of the corps, who is currently ranked as a General.
The Royal Marines Band Service is the musical wing of the Royal Navy and an independent element of the Royal Marines. It currently consists of five bands plus a training wing – the Royal Marines School of Music at HMS Nelson – and its headquarters is at HMS Excellent, Whale Island, Portsmouth.
These are the official Royal Navy Officer ranks ordered by rank. These ranks are part of the NATO/United Kingdom ranks, including modern and past. Past insignia is in italic.
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.
The Australian Defence Force's (ADF) ranks of officers and enlisted personnel in each of its three service branches of the Royal Australian Navy (RAN), the Australian Army, and the Royal Australian Air Force (RAAF) inherited their rank structures from their British counterparts. The insignia used to identify these ranks are also generally similar to those used in the British Armed Forces.
The uniforms of the Royal Navy have evolved gradually since the first uniform regulations for officers were issued in 1748. The predominant colours of Royal Navy uniforms are navy blue and white. Since reforms in 1997 male and female ratings have worn the same ceremonial uniform.
A senior enlisted advisor (SEA) in the United States Armed Forces is the most senior enlisted service member in a unit, and acts as an advisor to the commanding officer. Formally, E-9 billets for the senior enlisted advisor are established at service unit, command, major command, force, or fleet levels to the SEAs/CSELs of DoD Agencies and the Senior Enlisted Advisor to the Chairman of the Joint Chiefs of Staff. SEAs are also known as command senior enlisted leaders (CSEL). Always a non-commissioned officer, the SEA is the main link between the commanding officer and the enlisted service members under his or her charge.
A warrant officer (WO) in the British Armed Forces is a member of the highest-ranking group of non-commissioned ranks, holding the King's Warrant, which is signed by the Secretary of State for Defence.
The Warrant Officer of the Royal Air Force (WORAF), previously known as the Chief of the Air Staff's Warrant Officer (CASWO), is the senior Royal Air Force (RAF) appointment for a warrant officer (WO), and therefore the most senior non-commissioned appointment in the RAF. The person holding this military appointment advises the Chief of the Air Staff (CAS) on matters concerning airmen and airwomen of the RAF. The post was created in May 1996, as the Chief of the Air Staff's Warrant Officer. The post was re-titled Warrant Officer of the Royal Air Force (WORAF) on 1 July 2021, and whilst continuing to report directly to the Chief of the Air Staff, the scope of the WORAF was widened to 'work for the entirety of the RAF'. The current WORAF is WO Murugesvaran 'Subby' Subramaniam, who was appointed in April 2023. As of 2023, including the incumbent, there has been a total of eleven personnel in this appointment.
The Corps Regimental Sergeant Major is the most senior warrant officer of the Royal Marines. Responsible for maintaining standards and discipline within the Royal Marines, they act as a parental figure to their subordinates and also to junior officers, even though the latter technically outrank the RSM.
Admiral Sir Antony David Radakin, is a senior Royal Navy officer. Since November 2021, he is the 24th Chief of the Defence Staff, the professional head of the British Armed Forces, succeeding General Sir Nicholas Carter. Radakin also served as First Sea Lord, the professional head of the Naval Service from June 2019 to November 2021. He was Chief of Staff, Joint Forces Command, from 2016 to 2018, and the Second Sea Lord and Deputy Chief of the Naval Staff from 2018 to 2019. He was appointed Lord High Constable of England in 2023, and in that role, took part in the Coronation of Charles III and Camilla.
The Army Sergeant Major is the most senior member of the other ranks of the British Army.
Admiral Sir Benjamin John Key, is a senior Royal Navy officer. He has served as First Sea Lord since November 2021. He has commanded HM Ships Sandown, Iron Duke and Lancaster, and deployed on operations to Kosovo and Iraq. He was appointed Fleet Commander in 2016, and the Chief of Joint Operations in 2019.
Lieutenant Commander Carl P. "Speedy" Steedman is a Royal Navy officer, who served as Warrant Officer to the Royal Navy, the most senior non-commissioned advisor and senior rating of the Royal Navy from 31 January 2020 to July 2022.
