D

DAF - Desert Air Force
DAFTF - Desert Air Force Training Flight
DATCO - Deputy Air Traffic Controller
DBF - Destroyed by Fire
DBR - Damaged beyond repair
DCM - Distinguished Conduct Medal
DDR - East Germany Deutsche Democratic Republic - also GDR
Del/Dly - Delivery
Det/Dett - Detachment (detachment to another unit or Squadron)
DEW - Distant Early Warning (The DEW-line radar system)
D/F - Direct Finding (Station)
DFC - Distinguished Flying Cross
DFCS - Day Fighter Combat School, part of CFE
DFLS - Day Fighter Leaders School
DFM - Distinguished Flying Medal
DGA - Director General of Aviation
DGRD - Director General of Research & Development
DHFS - Defence Helicopter Flying School
DI - Drill Instructor
DI - Daily Inspection (This was done every morning on the Aircraft)
Disb - Disbanded
DME - Distance Measuring Equipment
DNCO - Did Not Complete Operation - see Boomerang
DOB - Deployed Operating Base
DSO - Distinguished Service Order
DTC - Descent Through Cloud
DTD - Directorate of Technical Development
DTN - Defence Teleprinter Network
DTD - Director of Technical Development (Air Ministry)
DTEO - Defence Test & Evaluation Organisation
DUAS - Durham University Air Squadron
DWI - Directional Wireless Installation (Magnetic Minesweepers)

E

EAAS - Empire Air Armament School
EAC - Eastern Air Command
EAF - East Africa Flight
EANS - Elementary Air Navigation School
EANS - Empire Air Navigation School
EAOS - Elementary Air Observer School
EASSU - Enemy Aircraft Storage & Servicing Unit
EATS - Empire Air Training Scheme
EBTS - Elementary and Basic Training School (Coastal Command)
EC - Escadrille de Chasse (Small French Fighter Unit)
EC - Engagement Controller (Bloodhound missile)
ECDU - Electronic Countermeasures Development Unit/Engine Control Demonstration Unit
ECFS - Empire Central Flying School
ECI - Engineer Control Instructors ECM - Electronic Countermeasures
ECU - Electronic Countermeasures Unit
EDD - Equipment Disposal Unit
EFS - Empire Flying School
EFTS - Elementary Flying Training School - (No 1 EFTS RAF Hatfield/Malton Canada, No.18 Fairoaks 1942 - 15 EFTS Regina. 23 EFTS Davidson , Manitoba (moved to Yorkton January 1945)
EGS - Elementary Gliding School
EGTS - Elementary Glider Training School
ELG - Emergency Landing Ground
EMCS - Eastern Mediterranean Communication Flight
EMUAS - East Midlands University Air Squadron
EP - Equipment Park
E&RFTS - Elementary& Reserve Flying Training School
ERS - Empire Radio School/Engine Repair Section
ETA - Estimated Time of Arrival
ETO - European Theatre of Operations
ETPS - Empire Test Pilots School
EOWS - Elementary Observer Wireless School
EU - Equipment Unit
EUAS - Edinburgh University Air Squadron
Evd - Evaded Capture
EWAU - Electronic Ware fare Avionics Unit
EWE&TU - Electronic Ware fare Experimental & Training Unit
E&WS - Electrical & Wireless School
EWS - Emergency Water Supply

F

F2E - Fitter II (Engines)
FAA - Fleet Air Arm
FAP - First Aid Post
FAGS - Fleet Aerial Gunners School
FATU - Flight Affiliation Training Unit/Fighter Armament Training Unit
FBDF - Flying Boat Development Flight
F-BFTS - France-Belgium Flying Training Unit
FBO - Fixed Base Operations
FBSU - Flying Boat Servicing Unit
FBSU - Flying Boat Servicing Unit
FC - Ferry Control/Fighter Command/Flying Control
FCCRS - Fighter Command Control & Reporting School
FCCS/F Fighter Command Communication Squadron/Flight
FCCU - Fighter Control Cooperation Unit
FCIRS/F - Fighter Command Instrument Rating Squadron/Flight
FCITF/S - Fighter Command Instrument Training Flight .Squadron
FCMPC - Fighter Command Missile Practice Camp
FCPU - Ferry Command Preparation Unit
FCRS - Fighter Command Radar School
FCS - Fighter Command School
FCS - Facility Checking Squadron
FCTU - Fighter Command Trials Unit
FDF - Fighter Defence Unit
F/E - Flight Engineer
FE - Far East
FEAF - Far East Air Force
FEAFES - Far East Air Force Examination Squadron
FECEF - Far East Casualty Evacuation Unit
FEE - Fighter Experimental Establishment
FEFBW - Far East Flying Boat Wing
FETDU - Far East Tactical Development Unit
FETS - Far East Training Squadron
FETW - Far East Training Wing
FF - Fighter Flight/Ferry Flight/Free French
FFAF - Free French Air Force
FFDPF - Free French Desert Patrol Flight
FFFF - Free French Fighter Flight
FFI - Free From Infection
FIDO - Fog Investigation and Dispersal Operation
F I DS/U - Fighter Interception Development Squadron/Unit
FIS - Flying Instructors School
F I U - Fighter Interception Unit
F/L - Flight Lieutenant
Flot - Flotille
FLS - Fighter Leaders School
Flt - Flight
F M A -Flight Mechanic Airframes
F M E Flight Mechanic Engines
FMS - Facilities Management Squadron
FMS - Field Maintenance Squadron
FSMO - Full Service Marching Order
F/O - Flying Officer
FP - Ferry Pool
FPP - Ferry Pilots Pool
FPU - Ferry Preparation Unit/Film Production Unit
FR - Fighter - reconnaissance
FRD - Forward Repair Depot
FRS - Flying Refresher School
FRU - Field Repair Unit/Fleet Requirements Unit
F/S - Flight Sergeant
FS - Fighting School
FSAF&G - Fleet School of Aerial Fighting & Gunnery School
FSDS - Fighter Support Development Squadron
FSP - Forward Staging Post
FSS - Ferry Support Squadron/Flying Selection Squadron
FSTS - Fire and Security Training School
FSTU - Fighter Support Training Unit
FTC - Flying Training Command
FTCPF - Flying Training Command Practice Flight
FTF/U - Ferry Training Flight/Unit
FTFlt - Ferry Training Flight
FTLU - French Tactical Liaison Unit
FTR - Failed to Return
FTS - Flying Training School (Prefixed s in wartime { 3FTS = RAF South Cerney 11FTS = RAF Shawbury}
FTU - Ferry Training Unit/Floatplane Training Unit/Flight Trials Unit
FU - Ferry Unit
FWS - Fighter Weapons School
F w - Feldwebel/Focke Wulfe

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