| Glossary and Abbreviations |
| AA |
Anti-aircraft |
| A&AEE |
Aeroplane and Armament Experimental Establishment, Boscombe Down |
| A/B |
Able-bodied seaman |
| A/C |
Aircraft |
| ACAS (Ops) |
Assistant Chief of the Air Staff (Operations) |
| ACAS (P) |
Assistant Chief of the Air Staff (Policy) |
| Adm |
Admiralty |
| Air Cdre |
Air Commodore |
| Amatol |
Explosive |
| AOC |
Air Officer Commanding |
| AOC-in-C |
Air Officer Commanding-in-Chief |
| AP |
Armour Piercing (bomb) or Aiming Point |
| API |
Air Position Indicator |
| A/S |
Anti-Submarine |
| A/T |
Anti-Torpedo |
| BC |
Bomber Command |
| BCFU |
Bomber Command Film Unit |
| Brawn |
Codename for FAA operation against Tirpitz |
| BST |
British Summer Time (GMT+1) |
| CAP |
Combat Air Patrol |
| Capt |
Captain, Kapitän zur See, Hauptmann |
| CAS |
Chief of the Air Staff |
| Catechism |
Codename for RAF operation against Tirpitz |
| Cdr |
Commander, Fregattenkapitän |
| CIU |
Central Interpretation Unit |
| CO |
Commanding Officer |
| CRD |
Controller of Research and Development, Ministry of Aircraft Production |
| CS |
Capital Ship (bomb) |
| DB Ops |
Director Bombing Operations, Air Ministry |
| DBST |
Double British Summer Time (GMT+2); BDST sometimes |
| DCAS |
Deputy Chief of the Air Staff |
| DFC |
Distinguished Flying Cross |
| DNC |
Director or Directorate of Naval Construction |
| DR |
Dead Reckoning |
| DSC |
Distinguished Service Cross |
| DSO |
Distinguished Service Order |
| ETA |
Estimated Time of Arrival |
| FAA |
Fleet Air Arm |
| Fg Off |
Flying Officer |
| Flt Lt |
Flight Lieutenant |
| F/Sgt |
Flight Sergeant |
| GAF |
German Air Force |
| Gee |
Navigational aid |
| Glycol |
Coolant liquid |
| GMT |
Greenwich Mean Time |
| Goodwood |
Codename for four FAA operations against Tirpitz |
| GP |
General Purpose (bomb) |
| Gp Capt |
Group Captain |
| GST |
German Summer Time |
| HC |
High Capacity (bomb) |
| HE |
High Explosive |
| H/F |
High Frequency or Heavy Flak |
| Highball |
Codename for "bouncing bomb" in Mosquito |
| HQ |
Headquaters |
| IAS |
Indicated Air Speed |
| IFF |
Identification Friend or Foe |
| JPS |
Joint Planning Staff (before 1941, Joint Planning Sub-committee of the Chiefs of Staff Commitee) |
| JSM |
Joint Services Mission |
| JW |
Johnny Walker (mine) |
| Km |
Kilometre |
| Knot |
Sea mile |
| LT |
Local Time |
| Lt |
Lieutenant, Kapitän-leutnant, Oberleutnant |
| Lt Cdr |
Lieutenant-commander, Korvetten-kapitän |
| Maj |
Major |
| MAP |
Ministry of Aircraft Production |
| Mascot |
Codename for FAA operation against Tirpitz |
| MC |
Medium Capacity (bomb) |
| Met |
Meteorological |
| Midshipman |
Faehnrich |
| MO |
Medical Officer |
| Mph |
Miles per hour |
| MPI |
Mean Point of Impact |
| NCO |
Non-Commissioned Officer |
| NID |
Naval Intelligence Division |
| Obviate |
Codename for RAF operation against Tirpitz |
| OC |
Officer Commanding |
| Oiled |
Codename for RAF operation against Tirpitz |
| Op |
Operation |
| ORB |
Operations Record Book |
| Paravane |
Codename for RAF operation against Tirpitz |
| Planet |
Codename for FAA operation against Tirpitz |
| Plt Off |
Pilot Officer |
| PR |
Photographic Reconnaissance |
| PRU |
Photographic Reconnaissance Unit |
| QFE |
Q code: barometric pressure at destination |
| RAAF |
Royal Australian Air Force |
| RAF |
Royal Air Force |
| RAS |
Rectified Air Speed |
| RCAF |
Royal Canadian Air Force |
| RDF |
Radio Direction Finding (radar) |
| RDX |
Research Department Explosive |
| Rev(s) |
Revolution(s) |
| RM |
Royal Marines |
| RN |
Royal Navy |
| RNZAF |
Royal New Zealand Air Force |
| RNZN |
Royal New Zealand Navy |
| RNZNVR |
Royal New Zealand Navy Volunteer Reserve |
| Rpm |
Revolution per minute |
| R/T |
Radio-telephony |
| SABS |
Stabilised Automatic Bomb Sight |
| SAP |
Semi-Armour Piercing (bomb) |
| SASO |
Senior Air Staff Officer |
| SBNO |
Senior British Naval Officer |
| Seaman |
Matrose |
| Servant |
Codename for Highball operation against Tirpitz |
| Sgt |
Sergeant |
| SIS |
Secret Intelligence Service (Norway) |
| SOE |
Special Operations Executive |
| Source |
Codename for RN X-craft/midget submarine attack on Tirpitz |
| Sqn Ldr |
Squadron Leader |
| Sub Lt |
Sub-lieutenant, Leutnant zur See |
| TAG |
Telegraphist Air Gunner |
| TBR |
Torpedu Bomber |
| Tiger Claw |
Codename for FAA operation against Tirpitz |
| Thrustful |
Codename for FAA operation against Tirpitz, changed to Tungsten |
| Title |
Codename for RN "Chariot" operation against Tirpitz |
| Torpex |
Underwater explosive |
| TOT |
Time over Target |
| Tungsten |
Codename for FAA operation against Tirpitz |
| TV |
Terminal Velocity |
| U/S |
Unserviceable |
| USAAF |
United States Army Air Force(s) |
| USN |
United States Navy |
| USSR |
Union of Soviet Socialist Republics |
| VA2 HF |
Vice-Admiral, Second-in-Command Home Fleet |
| VC |
Victoria Cross |
| VCNS |
Vice-Chief of the Naval Staff |
| VHF |
Very High Frequency |
| WA |
Western Air (plans) |
| Wg Cdr |
Wing Commander |
| WO |
War Office or Warrant Officer |
| W/Op |
Wireless Operator |
| W/T |
Wireless Telegraphy |