List of Royal Air Force units &amp; establishmentsList of Royal Air Force units &amp; establishments List of Royal Air Force units & establishments There have been many Units with various tasks in the Royal Air Force and they are listed here. A unit is an administrative body, which can be larger or smaller than a Flight or Squadron, is given a specific mission, but does not warrant the status of being formed as a formal Flight or Squadron. A. Aircraft units. Overseas Aircraft Despatch Overseas Aircraft Preparation Aircraft Preparation Other Advanced Flying Units. Observers Pilots Armament Practice and Training Units. To hone aircrew weapons skills armament practice camps and stations have been used and these are  listed here. Armament Practice Camp Armament Practice Station Armament Training Camp Armament Training Station C. Conversion Units. The RAF have now granted all OCUs Reserve squadron status. F. Ferry units. Ferry Units Ferry Crew Pools Ferry Pilots Pools Ferry Pools Ferry Training Units Other Ferry Units Operational Training Units (OTU). OTUs were created during World War II to take the pressure off Operational squadrons, which previously would have had training Flights. Post war they became OCUs Other Units. Numbered other units Other units See also. Royal Air Force Army Air Corps Fleet Air Arm Others List of Royal Air Force