Conversion units and operational conversion units (OCUs) were training units of 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) and ...

(RAF).

History

With the introduction of new heavy bombers, the four-engined

Short Stirling The Short Stirling was a British four-engined heavy bomber of the Second World War. It has the distinction of being the first four-engined bomber to be introduced into service with the Royal Air Force (RAF). The Stirling was designed during t ...

Avro Lancaster The Avro Lancaster is a British Second World War heavy bomber. It was designed and manufactured by Avro as a contemporary of the Handley Page Halifax, both bombers having been developed to the same specification, as well as the Short Stirlin ...

, and

Handley Page Halifax The Handley Page Halifax is a British Royal Air Force (RAF) four-engined heavy bomber of the Second World War. It was developed by Handley Page to the same specification as the contemporary twin-engine Avro Manchester. The Halifax has its or ...

, the Royal Air Force introduced heavy conversion units (HCU). These HCUs began forming in late 1941, to qualify crews trained on medium bombers to operate the heavy bombers before final posting to the operational squadrons. Some of the HCUs were involved in bombing operations over Germany. After the end of 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 vast majority of the world's countries—including all of the great powers—forming two opposin ...

, the role of the HCUs was taken over by the operational conversion units (OCUs). Although the units had nominal bases, different flights and individual aircraft usually were detached nearer the operational bases. RAF OCUs are training units that prepare aircrew for operations on a particular type or types of aircraft or roles. Some OCUs have a shadow, or reserve, squadron designation, which is used if the unit has a war role.

Current RAF OCUs

Lightning -

RAF Marham RAF Marham is a Royal Air Force station and military airbase near the village of Marham in the English county of Norfolk, East Anglia. It is home to No. 138 Expeditionary Air Wing (138 EAW) and, as such, is one of the RAF's "Main Operating ...

* 207 Squadron Typhoon -

RAF Coningsby Royal Air Force Coningsby or RAF Coningsby , is a Royal Air Force (RAF) station located south-west of Horncastle, and north-west of Boston, in the East Lindsey district of Lincolnshire, England. It is a Main Operating Base of the RAF and hom ...

* 29 Squadron Hawk -

RAF Valley Royal Air Force Valley or more simply RAF Valley ( cy, Llu Awyr Brenhinol Y Fali) is a Royal Air Force station on the island of Anglesey, Wales, and which is also used as Anglesey Airport. It provides both basic and advanced fast-jet training ...

* 4 Squadron - Hawk T.2 Support helicopter (Puma and Chinook) -

RAF Benson Royal Air Force Benson or RAF Benson is a Royal Air Force (RAF) station located at Benson, near Wallingford, in South Oxfordshire, England. It is a front-line station and home to the RAF's fleet of Westland Puma HC2 support helicopters, use ...

* 28 Squadron Hercules -

RAF Brize Norton Royal Air Force Brize Norton or RAF Brize Norton in Oxfordshire, about west north-west of London, is the largest station of the Royal Air Force. It is close to the village of Brize Norton, and the towns of Carterton and Witney. The station ...

* 24 Squadron - OCU Flight ISTAR -

RAF Waddington Royal Air Force Waddington otherwise known as RAF Waddington is a Royal Air Force (RAF) station located beside the village of Waddington, south of Lincoln, Lincolnshire in England. The station is the RAF's Intelligence Surveillance Target A ...

* 54 Squadron Tutor -

RAF Wittering Royal Air Force Wittering or more simply RAF Wittering is a Royal Air Force station within the unitary authority area of Peterborough, Cambridgeshire and the unitary authority area of North Northamptonshire. Although Stamford, Lincolnshire, Sta ...

* 115 Squadron Some aircraft types operated by a single squadron, which includes most transport aircraft, and most ISTAR aircraft, are not big enough to need a dedicated OCU squadron for their training requirements; they may only have a few at any time. Therefore, smaller squadrons also incorporate training facilities to allow them to process aircrew onto their aircraft type. Some roles, such as ISTAR, require more rear crew for the aircraft, such as

weapon systems officer A Weapon Systems Officer (WSO), nicknamed "Wizzo", is an air flight officer directly involved in all air operations and weapon systems of a military aircraft. Historically, aircrew duties in military aircraft were highly specialised and rigi ...

s (WSOs) and weapon systems operators (WSOps) - their training can be more generalised, and this is carried out by 54 Squadron at

. This reduces the training requirement on the individual ISTAR squadrons, by providing aircrew who require only aircraft conversion training when they reach their squadrons. Pilots are trained directly onto their aircraft type by the frontline squadrons using training "flights". An example of this is the OCU flight of 24 Squadron, which trains new Hercules aircrew onto the aircraft. OCUs are monitored by the RAF's

Central Flying School The Central Flying School (CFS) is the Royal Air Force's primary institution for the training of military flying instructors. Established in 1912 at the Upavon Aerodrome, it is the longest existing flying training school. The school was based at R ...

to maintain training standards. Training is delivered by qualified flying instructors (QFIs) and qualified weapons instructors, and frontline squadrons also have qualified individuals to deliver continual and refresher training after the OCU. OCUs generally also provide training for those aircrew selected to become QFIs on an aircraft type - an example would be 208(R) Squadron, which currently trains aircrew for 100 Squadron, QFIs for 208(R), and provides refresher training for aircrew joining the RAF aerobatic team, the

Red Arrows The Red Arrows, officially known as the Royal Air Force Aerobatic Team, is the aerobatics display team of the Royal Air Force based at RAF Waddington. The team was formed in late 1964 as an all-RAF team, replacing a number of unofficial teams ...

History

Current RAF OCUs

List of conversion units

Additional

See also

References

Citations

Bibliography