Squadron leader (Sqn Ldr in the RAF ; SQNLDR in the
RAAF
"Through Adversity to the Stars"
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and
RNZAF; formerly sometimes S/L in all services) is a
commissioned rank in the
Royal Air Force
The Royal Air Force (RAF) is the United Kingdom's air and space force. It was formed towards the end of the First World War on 1 April 1918, becoming the first independent air force in the world, by regrouping the Royal Flying Corps (RFC) an ...
and the air forces of many countries which have historical British influence. It is also sometimes used as the English translation of an equivalent rank in countries which have a non-English air force-specific rank structure.
An air force squadron leader ranks above
flight lieutenant
Flight lieutenant is a junior commissioned rank in air forces that use the Royal Air Force (RAF) system of ranks, especially in Commonwealth countries. It has a NATO rank code of OF-2. Flight lieutenant is abbreviated as Flt Lt in the Indi ...
and immediately below
wing commander and it is the most junior of the senior officer ranks. The air force rank of squadron leader has a
NATO
The North Atlantic Treaty Organization (NATO, ; french: Organisation du traité de l'Atlantique nord, ), also called the North Atlantic Alliance, is an intergovernmental military alliance between 30 member states – 28 European and two No ...
ranking code of
OF-3, equivalent to a
lieutenant-commander in the
Royal Navy
The Royal Navy (RN) is the United Kingdom's naval warfare force. Although warships were used by Kingdom of England, English and Kingdom of Scotland, Scottish kings from the early medieval period, the first major maritime engagements were foug ...
or a
major in the
British Army
The British Army is the principal land warfare force of the United Kingdom, a part of the British Armed Forces along with the Royal Navy and the Royal Air Force. , the British Army comprises 79,380 regular full-time personnel, 4,090 Gur ...
or the
Royal Marines. The equivalent rank in the
Women's Auxiliary Air Force,
Women's Royal Air Force (until 1968) and
Princess Mary's Royal Air Force Nursing Service (until 1980) was "squadron officer".
Squadron leader has also been used as a cavalry command appointment (UK) and rank (France) since at least the nineteenth century. In Argentina it is used as a command appointment by both the army's cavalry and by the air force's flying units. The cavalry rank of squadron leader in France is also an OF-4 equivalent to a major, and the cavalry appointment of squadron leader in the UK generally corresponds to this rank as well.
Origins
The rank originated in the British
Royal Air Force
The Royal Air Force (RAF) is the United Kingdom's air and space force. It was formed towards the end of the First World War on 1 April 1918, becoming the first independent air force in the world, by regrouping the Royal Flying Corps (RFC) an ...
and was adopted by several other air forces which use, or used, the
RAF rank system.
On 1 April 1918, the newly created RAF adopted its officer rank titles from the
British Army
The British Army is the principal land warfare force of the United Kingdom, a part of the British Armed Forces along with the Royal Navy and the Royal Air Force. , the British Army comprises 79,380 regular full-time personnel, 4,090 Gur ...
, with
Royal Naval Air Service
The Royal Naval Air Service (RNAS) was the air arm of the Royal Navy, under the direction of the Admiralty's Air Department, and existed formally from 1 July 1914 to 1 April 1918, when it was merged with the British Army's Royal Flying Corps t ...
lieutenant commanders and
Royal Flying Corps
"Through Adversity to the Stars"
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majors becoming majors in the RAF. In response to the proposal that the RAF should use its own rank titles, it was suggested that the RAF might use the
Royal Navy
The Royal Navy (RN) is the United Kingdom's naval warfare force. Although warships were used by Kingdom of England, English and Kingdom of Scotland, Scottish kings from the early medieval period, the first major maritime engagements were foug ...
's officer ranks, with the word "air" inserted before the naval rank title. For example, the rank that later became squadron leader would have been air lieutenant commander. However, the
Admiralty objected to this modification of their rank titles. The rank title squadron leader was chosen as
squadrons were typically led by RAF majors and the term squadron commander had been used in the Royal Naval Air Service. The rank of squadron leader was introduced in August 1919 and has been used continuously since then.
RAF usage
From 1 April 1918 to 31 July 1919, the RAF used major as the equivalent rank to squadron leader. Royal Naval Air Service lieutenant-commanders and Royal Flying Corps majors on 31 March 1918 became RAF majors on 1 April 1918. On 31 August 1919, the RAF rank of major was superseded by squadron leader which has remained in continuous usage ever since. Promotion to squadron leader is strictly on merit, and requires the individual to be appointed to a Career Commission, which will see them remain in the RAF until retirement or voluntary resignation.

Before the
Second World War
World War II or the Second World War, often abbreviated as WWII or WW2, was a world war that lasted from 1939 to 1945. It involved the World War II by country, vast majority of the world's countries—including all of the great power ...
, a squadron leader commanded a
squadron of aircraft. Today, however, a flying squadron is usually commanded by a
wing commander, with each of the two
flights under a squadron leader. However, ground-operating squadrons which are sub-divisions of a
wing
A wing is a type of fin that produces lift while moving through air or some other fluid. Accordingly, wings have streamlined cross-sections that are subject to aerodynamic forces and act as airfoils. A wing's aerodynamic efficiency is exp ...
are ordinarily commanded by a squadron leader. This includes squadrons of the
RAF Regiment and
University Air Squadrons.
Insignia and command flag
The rank insignia consists of a thin blue band on a slightly wider black band between two narrow blue bands on slightly wider black bands. This is worn on both the lower sleeves of the tunic or on the shoulders of the flying suit or the casual uniform.
Squadron leaders are the lowest ranking officers that may fly a command flag. The flag may be depicted on the officer's aircraft or, should the squadron leader be in command, the flag may be flown from a flagpole or displayed on an official car as a car flag. If the squadron leader is in command of a numbered squadron, then the number of the squadron is also shown on the flag.
File:UK-Air-OF3.svg, An RAF squadron leader's sleeve/shoulder insignia
File:File-UK-Air-OF3-mess-insignia.svg, An RAF squadron leader's sleeve mess insignia
File:RAF-Sqn Ldr-OF-3.png, An RAF squadron leader's sleeve on No.1 service dress uniform
Other air forces
The rank of squadron leader is also used in a number of the air forces in the
Commonwealth
A commonwealth is a traditional English term for a political community founded for the common good. Historically, it has been synonymous with " republic". The noun "commonwealth", meaning "public welfare, general good or advantage", dates from th ...
, including the
Bangladesh Air Force
The Bangladesh Air Force (BAF) ( bn, বাংলাদেশ বিমান বাহিনী, Bangladesh Biman Bahini) is the aerial warfare branch of the Bangladesh Armed Forces. The Air Force is primarily responsible for air defence of B ...
(BAF),
Ghana Air Force,
Indian Air Force (IAF),
Namibian Air Force,
Sri Lanka Air Force (SLAF),
Pakistan Air Force
, "Be it deserts or seas; all lie under our wings" (traditional)
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(PAF),
Royal Australian Air Force
"Through Adversity to the Stars"
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(RAAF),
Nigerian Air Force (NAF), and
Royal New Zealand Air Force (RNZAF). It is also used in the
Egyptian Air Force
The Egyptian Air Force (EAF) ( ar, القوات الجوية المصرية, El Qūwāt El Gawīyä El Maṣrīya), is the aviation branch of the Egyptian Armed Forces that is responsible for all airborne defence missions and operates all mili ...
,
Hellenic Air Force,
Royal Air Force of Oman the
Royal Thai Air Force and the
Air Force of Zimbabwe.
Canada used the rank of squadron leader from 1920 to 1968. With the unification of the
Canadian Armed Forces in 1968, the
air force
An air force – in the broadest sense – is the national military branch that primarily conducts aerial warfare. More specifically, it is the branch of a nation's armed services that is responsible for aerial warfare as distinct from an ar ...
rank titles were aligned to those of the Canadian Army with Canadian squadron leaders became majors while a common rank insignia was adopted. However, in 2015, the insignia for Canadian air force majors reverted to two and half strips of braid in pearl grey on black.
The Chilean Air Force equivalent rank, in Chilean Spanish, is ''comandante de escuadrilla'' or squadron commander.
File:Australia RAAF OF-3.svg, An RAAF
"Through Adversity to the Stars"
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squadron leader's sleeve/shoulder insignia
File:NZ-Air-OF3.svg, A RNZAF squadron leader's sleeve/shoulder insignia
File:Canadian RCAF OF-3.svg, A RCAF major's sleeve/shoulder insignia, with rank braids in the traditional Commonwealth style.
File:Hellenic Air Force OF-3.svg, A Hellenic Air Force ''Episminagos'' (squadron leader's) rank insignia
File:Indian IAF OF-3.svg, An Indian Air Force squadron leader's rank insignia
File:10-Namibia Air Force-SQNLDR.svg, A Namibian Air Force squadron leader's rank insignia
File:RTAF OF-3 (Squadron Leader).svg, A RTAF squadron leader's rank insignia
File:Sqn Ldr Pakistan Air Force.png, A PAF squadron-leader's shoulder rank insignia.
File:Fach escu.png, A FACh
The German system (; literally "compartment" or "subject of study", here in the sense of "vocal specialization") is a method of classifying singers, primarily opera singers, according to the range, weight, and color of their voices. It is used ...
squadron commander's shoulder rank insignia.
File:Squadron Leader - Egyptian Air Force rank.png, An EAF EAF may refer to:
Military
* Egyptian Air Force
* Estonian Air Force
* Ethiopian Air Force
* East Africa Forces, in the compendium of postage stamp issuers
Other uses
* EAF family of proteins
* Earagail Arts Festival, in County Donegal, Irela ...
squadron leader's rank insignia.
Land forces
In the British
Household Cavalry and
Royal Armoured Corps, "squadron leader" is the title (but not the rank) often given to the commander of a squadron (
company) of
armoured fighting vehicle
An armoured fighting vehicle (AFV) is an armed combat vehicle protected by armour, generally combining operational mobility with offensive and defensive capabilities. AFVs can be wheeled or tracked. Examples of AFVs are tanks, armoured ca ...
s. The squadron leader is usually a major, although in the
Second World War
World War II or the Second World War, often abbreviated as WWII or WW2, was a world war that lasted from 1939 to 1945. It involved the World War II by country, vast majority of the world's countries—including all of the great power ...
the post was often held by a
captain
Captain is a title, an appellative for the commanding officer of a military unit; the supreme leader of a navy ship, merchant ship, aeroplane, spacecraft, or other vessel; or the commander of a port, fire or police department, election precinct, e ...
.
See also
*
Air force officer rank insignia
*
British and U.S. military ranks compared
*
Comparative military ranks
*
RAF officer ranks
*
Ranks of the RAAF
References
External links
RAF Command Flags
{{UK officer ranks
Military ranks of the Commonwealth
Military ranks of Australia
Former military ranks of Canada
Military ranks of the Royal Air Force
Air force ranks
Military ranks of Pakistan
Military ranks of Bangladesh
Military ranks of Sri Lanka
1919 introductions
Military ranks of the Indian Air Force