Squawk Codes – UK aviation Transponder Codes
UK aviation, Squawk Codes are four-digit transponder codes assigned by air traffic control (ATC) to help identify aircraft on radar. These codes allow controllers to track flights and manage air traffic efficiently.
Here’s a breakdown of how they work:
Standard UK Squawk Codes (Conspicuity Codes)
These are commonly used codes that pilots set on their transponders in specific situations:
- 7000 – Used for Visual Flight Rules (VFR) flights in uncontrolled airspace.
- 2000 – Assigned when entering controlled airspace from an area without a discrete squawk.
- 7004 – Used for aerobatic flights.
- 7001 – Military flights conducting practice interceptions.
- 7500 – Hijacking alert (not to be set unless actually being hijacked!).
- 7600 – Radio communication failure.
- 7700 – General emergency (e.g., engine failure, medical emergency).
Assigned Squawk Codes
ATC may assign a specific discrete squawk code to an aircraft for identification, particularly in controlled airspace. These are unique to each flight and help distinguish aircraft from one another.
Mode A, C, and S Transponders
- Mode A – Sends only the squawk code.
- Mode C – Adds altitude information.
- Mode S – Provides more detailed data, including callsign and aircraft ID.
| Codes / Series | Controlling Authority / Function |
|---|---|
| * 0000 | SSR data unreliable |
| * 0001 | Height Monitoring Unit |
| * 0002 | Ground Transponder Testing |
| * 0003 | Surrey/Sussex HEMS (HLE60) |
| 0004 — 0005 | Scottish Non-standard Flights |
| * 0006 | British Transport Police ASU |
| * 0007 | Off-shore Safety Area (OSA) Conspicuity |
| * 0010 | Aircraft operating outside of Birmingham Controlled Airspace Zone and monitoring Birmingham Radar frequency |
| * 0011 | Aircraft operating outside of Southampton/Bournemouth Zones/Areas and monitoring Solent Radar frequencies |
| * 0012 | Aircraft operating outside of Heathrow/London City/Gatwick CAS and monitoring Thames/Gatwick Radar frequency |
| * 0013 | Aircraft operating outside of Luton/Stansted CAS and monitoring Luton/Essex Radar frequency |
| * 0014 | Kent Air Ambulance (HLE21) |
| * 0015 | Essex Air Ambulance (HLE07) |
| * 0016 | Thames Valley Air Ambulance (HLE24) |
| * 0017 | London Air Ambulance (HLE27) |
| * 0020 | Air Ambulance Helicopter Emergency Medivac |
| * 0021 | Fixed-wing aircraft (Receiving service from a ship) |
| * 0022 | Helicopter(s) (Receiving service from a ship) |
| * 0023 | Aircraft engaged in actual SAR Operations |
| * 0024 | Radar Flight Evaluation/Calibration |
| 0025 | Scottish Non-standard Flights |
| * 0026 | Special Tasks (Mil) – activated under Special Flight Notification (SFN) |
| * 0027 | London Control (Swanwick) Ops Crossing/Joining CAS |
| * 0030 | FIR Lost |
| * 0031 | Hertfordshire Air Ambulance (HLE55) |
| * 0032 | Aircraft engaged in police air support operations |
| * 0033 | Aircraft Paradropping |
| * 0034 | Antenna trailing/target towing |
| * 0035 | Selected Flights – Helicopters |
| * 0036 | Helicopter Pipeline/Powerline Inspection Flights |
| * 0037 | Royal Flights – Helicopters |
| * 0040 | Civil Helicopters North Sea |
| * 0041 — 0061 | Police Air Support |
| 0062 — 0077 | No 1 Air Control Centre |
| * 0100 | NATO – CAOC F (activated by NOTAM via ASACS Force Command) |
| 0101 — 0117 | Transit (ORCAM) Brussels |
| 0120 — 0137 | Transit (ORCAM) Germany |
| 0140 — 0177 | Transit (ORCAM) Amsterdam |
| * 0200 | NATO – CAOC Uedem (activated by NOTAM via ASACS Force Command) |
| 0201 — 0277 | Allocated to NATS as CCAMS redundancy |
| * 0300 | NATO – CAOC Uedem (activated by NOTAM via ASACS Force Command) |
| 0301 — 0377 | Assigned by CCAMS |
| * 0400 | NATO – CAOC Uedem (activated by NOTAM via ASACS Force Command) |
| * 0401 | RAF Leeming Conspicuity |
| 0401 — 0420 | Birmingham Approach |
| 0401 — 0437 | Ireland Domestic |
| 0401 — 0450 | Exeter Approach |
| 0401 — 0467 | RAF Lakenheath |
| 0402 — 0426 | RAF Leeming |
| 0421 — 0427 | Farnborough Radar |
| * 0427 | RAF Leeming (Topcliffe) Conspicuity |
| 0430 — 0437 | Edinburgh Approach |
| 0430 — 0446 | Farnborough LARS West |
| * 0440 | Edinburgh Frequency Monitoring Code |
| 0441 — 0443 | Edinburgh Approach |
| * 0447 | Farnborough LARS West (Blackbushe departures) |
| * 0450 | Blackpool Basic Service Conspicuity |
| 0450 — 0456 | Farnborough LARS West |
| *0451 | Blackpool Procedural Service Conspicuity |
| *0452 | Morecambe Bay Helicopter Conspicuity |
| * 0453 | Liverpool Bay Helicopter Conspicuity |
| * 0457 | Farnborough LARS West (Fairoaks departures) |
| 0460 — 0465 | Farnborough LARS West |
| *0466 | Farnborough LARS West (Fairoaks Departures) |
| 0467 | Farnborough LARS West |
| 0470 — 0477 | Allocated to NATS as CCAMS redundancy |
| * 0500 | NATO – CAOC Uedem (activated by NOTAM via ASACS Force Command) |
| 0501 — 0577 | Assigned by CCAMS |
| * 0600 | NATO – CAOC Uedem (activated by NOTAM via ASACS Force Command) |
| 0601 — 0637 | Transit (ORCAM) Germany |
| 0640 — 0677 | Transit (ORCAM) Paris |
| * 0700 | NATO – CAOC Uedem (activated by NOTAM via ASACS Force Command) |
| 0701 — 0727 | Transit (ORCAM) Maastricht |
| 0730 — 0767 | Assigned by CCAMS |
| 0770 — 0777 | Transit (ORCAM) Maastricht |
| Codes / Series | Controlling Authority / Function |
|---|---|
| 1000 | IFR GAT flights operating in designated Mode S Airspace |
| 1001 — 1067 | Transit (ORCAM) Spain |
| 1070 — 1077 | Assigned by CCAMS |
| * 1100 | NATO – CAOC Uedem (activated by NOTAM via ASACS Force Command) |
| 1101 — 1137 | Transit (ORCAM) Germany |
| 1140 — 1157 | Transit (ORCAM) Malta |
| 1160 — 1176 | Assigned by CCAMS |
| * 1177 | London Control (Swanwick) FIS |
| * 1200 | NATO – CAOC Uedem (activated by NOTAM via ASACS Force Command) |
| 1201 — 1277 | Channel Islands Domestic |
| * 1300 | NATO – CAOC Uedem (activated by NOTAM via ASACS Force Command) |
| 1301 — 1327 | NATO – Air Policing (Air Defence Priority Flights) |
| 1330 — 1377 | Transit (ORCAM) Germany |
| * 1400 | NATO – CAOC Uedem (activated by NOTAM via ASACS Force Command) |
| 1401 — 1407 | Irish CCAMS Contingency Codes |
| 1410 — 1477 | Assigned by CCAMS |
| * 1500 — 1577 | NATO – CAOC Uedem (activated by NOTAM via ASACS Force Command) |
| * 1600 — 1677 | NATO – CAOC Uedem (activated by NOTAM via ASACS Force Command) |
| * 1700 — 1727 | NATO – CAOC Uedem (activated by NOTAM via ASACS Force Command) |
| 1730 — 1744 | Newquay Approach |
| 1730 — 1746 | Farnborough LARS East |
| 1730 — 1756 | RAF Coningsby |
| * 1730 — 1767 | RAF Spadeadam |
| 1745 | Newquay Fixed-wing |
| 1746 | Newquay Helicopters |
| * 1747 | Farnborough LARS East Conspicuity |
| * 1747 | Newquay Conspicuity |
| 1750 — 1757 | Newquay Approach |
| 1750 — 1757 | Scatsta, Shetland |
| * 1757 | RAF Coningsby Conspicuity |
| 1760 — 1777 | RAF Coningsby |
| 1760 — 1777 | RNAS Yeovilton Fighter Control |
| Codes / Series | Controlling Authority / Function |
|---|---|
| * 2000 | Aircraft from a non SSR environment, or on the aerodrome surface in accordance with |
| 2001 — 2077 | Assigned by CCAMS |
| * 2100 | NATO – CAOC Uedem (activated by NOTAM via ASACS Force Command) |
| 2101 — 2177 | Transit (ORCAM) Amsterdam |
| * 2200 | NATO – CAOC Uedem (activated by NOTAM via ASACS Force Command) |
| 2201 — 2277 | Assigned by CCAMS |
| * 2300 | NATO – CAOC Uedem (activated by NOTAM via ASACS Force Command) |
| 2301 — 2377 | Transit (ORCAM) France |
| * 2400 — 2477 | NATO – CAOC Uedem (activated by NOTAM via ASACS Force Command) |
| * 2500 | NATO – CAOC Uedem (activated by NOTAM via ASACS Force Command) |
| 2501 — 2577 | Transit (ORCAM) Germany |
| * 2600 | NATO – CAOC Uedem (activated by NOTAM via ASACS Force Command) |
| 2601 — 2617 | Glasgow Approach |
| 2601 — 2637 | RAF Cranwell |
| 2601 — 2645 | MoD Boscombe Down |
| 2601 — 2657 | Irish Domestic Westbound departures and Eastbound arrivals |
| * 2620 | Glasgow Airport Frequency Monitoring Code |
| 2621 — 2630 | Aberdeen (Sumburgh Approach) |
| 2631 — 2637 | Aberdeen (Northern North Sea Off-shore) |
| 2640 — 2642 | RAF Cranwell – Lincolnshire AIAA |
| 2640 — 2657 | Aberdeen (Northern North Sea Off-shore – Sumburgh Sector) |
| 2643 — 2644 | RAF Cranwell |
| * 2645 | RAF Cranwell Conspicuity |
| 2646 — 2647 | RAF Cranwell |
| 2646 — 2647 | MoD Boscombe Down – UAS |
| * 2650 | MoD Boscombe Down Conspicuity |
| 2650 — 2653 | Leeds Bradford Approach |
| 2651 — 2657 | MoD Boscombe Down |
| * 2654 | Leeds Bradford Conspicuity |
| 2655 — 2676 | Leeds Bradford Approach |
| * 2660 | Thruxton conspicuity |
| 2660 — 2677 | Aberdeen (Northern North Sea Off-shore) |
| 2661 — 2675 | Middle Wallop |
| * 2676 | Middle Wallop Conspicuity |
| 2677 | Middle Wallop Conspicuity |
| * 2677 | Aircraft operating outside of Leeds Bradford Controlled Airspace Zone and Monitoring Leeds Bradford Radar frequency |
| * 2700 | NATO – CAOC Uedem (activated by NOTAM via ASACS Force Command) |
| 2701 — 2737 | Assigned by CCAMS |
| 2740 — 2777 | Transit (ORCAM) Zurich |
| Codes / Series | Controlling Authority / Function |
|---|---|
| 3000 | NATO Aircraft receiving a service from AEW aircraft |
| 3001 — 3077 | Transit (ORCAM) Zurich |
| 3100 | NATO Aircraft receiving a service from AEW aircraft |
| 3101 — 3127 | Transit (ORCAM) Germany |
| 3130 — 3177 | Transit (ORCAM) Amsterdam |
| 3200 | NATO Aircraft receiving a service from AEW aircraft |
| 3201 — 3277 | Transit (ORCAM) Turkey – may also be Assigned by CCAMS |
| 3300 | NATO Aircraft receiving a service from AEW aircraft |
| 3301 — 3303 | Swanwick (Military) Special Tasks |
| 3304 — 3306 | Aircraft receiving a service from London D&D Cell |
| *3307 | D&D Conspicuity Training Fix |
| 3310 — 3367 | Swanwick (Military) |
| 3370 — 3377 | Allocated to NATS as CCAMS redundancy |
| 3400 | NATO Aircraft receiving a service from AEW aircraft |
| 3401 — 3477 | Assigned by CCAMS |
| 3500 | NATO Aircraft receiving a service from AEW aircraft |
| 3501 — 3507 | Transit (ORCAM) Luxembourg |
| 3510 — 3537 | Assigned by CCAMS |
| 3540 — 3577 | Transit (ORCAM) Berlin |
| 3600 | NATO Aircraft receiving a service from AEW aircraft |
| 3601 — 3623 | RAF Benson |
| 3601 — 3632 | Scottish ATSOCA Purposes |
| 3601 — 3634 | RAF Waddington |
| 3601 — 3647 | Jersey Approach |
| 3601 — 3657 | Cardiff Approach |
| * 3624 | RAF Benson Conspicuity |
| 3625 — 3627 | RAF Benson |
| * 3637 | Wycombe Air Park Conspicuity. Not to be used outside 20 nm from the airfield. |
| 3640 — 3645 | RAF Odiham |
| 3640 — 3666 | RAF Marham |
| 3640 — 3677 | Aberdeen (Northern North Sea Off-shore) |
| 3641 — 3647 | BAE Systems Warton |
| * 3646 | RAF Odiham Conspicuity |
| 3646 — 3657 | Cardiff Approach |
| 3647 — 3653 | RAF Odiham |
| * 3650 | BAE Systems Warton Conspicuity |
| 3651 — 3657 | BAE Systems Warton |
| * 3660 | Warton Aerodrome Frequency Monitoring Code |
| 3660 — 3665 | Solent Approach (Southampton) |
| 3661 — 3677 | BAE Systems Warton |
| * 3666 | Solent Radar Conspicuity |
| * 3667 | RAF Marham – FIS Conspicuity |
| 3667 — 3677 | Solent Approach (Southampton) |
| 3700 | NATO Aircraft receiving a service from AEW aircraft |
| 3701 — 3710 | Norwich Approach |
| * 3701 — 3717 | Military aircraft under service from RN AEW aircraft in South West Approaches |
| 3701 — 3736 | RAF Brize Norton |
| 3701 — 3747
3701 — 3767 |
Guernsey Approach
RAF Lossiemouth |
| 3720 — 3727 | RAF Valley
RAF Wittering Approach/Director |
| 3720 — 3766 | Newcastle Approach |
| 3730 — 3736 | RAF Valley |
| 3730 — 3747 | RAF Wittering Tutor Operations |
| * 3737 | RAF Valley – Visual Recovery
RAF Brize Norton Approach Conspicuity |
| 3740 — 3745 | RAF Brize Norton |
| 3740 — 3747 | RAF Valley |
| * 3750 | RAF Wittering Zone Conspicuity (Basic Service) |
| 3750 — 3751 | RAF Valley GH |
| 3750 — 3761 | TC Gatwick |
| 3751 — 3757 | RAF Wittering Zone Transits |
| 3752 | RAF Valley – RIFA |
| * 3753 | RAF Valley – Low Level Helicopters |
| * 3754 | RAF Valley – Special Tasks |
| 3755 | RAF Valley Radar Practice Force Landing (RPFL) |
| 3756 | RAF Valley Straight In Practice Force Landing (SIPFL) |
| 3757 | RAF Valley Rotary at RAF Mona |
| 3760 | RAF Wittering |
| 3760 — 3765 | RAF Valley GH |
| 3761 | RAF Wittering – Cranwell/Wittering/Cranwell VFR Transit |
| * 3762 | Shoreham ATS IFR |
| 3762 | RAF Wittering |
| * 3763 | Shoreham ATS VFR |
| 3764 — 3766 | Gatwick Tower |
| * 3767 | Redhill Approach Conspicuity |
| * 3767 | Newcastle Approach Conspicuity |
| 3770 — 3777 | Western Radar |
| Codes / Series | Controlling Authority / Function |
|---|---|
| 4000 | NATO Aircraft receiving a service from AEW aircraft |
| 4001 — 4077 | Transit (ORCAM) France |
| 4100 | NATO Aircraft receiving a service from AEW aircraft |
| 4101 — 4177 | Transit (ORCAM) Germany |
| 4200 | NATO Aircraft receiving a service from AEW aircraft |
| 4201 — 4214 | Assigned by CAA |
| 4215 — 4247 | Assigned by CCAMS |
| 4250 — 4257 | Belfast City Approach |
| 4250 — 4267 | Aberdeen Approach |
| 4250 — 4277 | Humberside Approach |
| 4300 | NATO Aircraft receiving a service from AEW aircraft |
| 4301 — 4306 | Assigned by CAA |
| 4307 — 4317 | London Control Non-Standard Flights |
| 4320 — 4327 | Ireland Domestic
RNAS Yeovilton |
| 4330 — 4337 | UK Domestic (Prestwick Centre Special Sector Codes) |
| 4340 — 4353 | UK Domestic (Scottish Special Sector Codes) |
| * 4354 — 4356 | Westland Helicopters Yeovil |
| 4357
* 4357 |
Ireland Domestic
RNAS Yeovilton Conspicuity |
| * 4360 — 4361 | Coventry Airport Conspicuity |
| 4360 — 4361 | Oil Survey Helicopters – Faeroes/Iceland Gap |
| * 4360 — 4367 | Westland Helicopters Yeovil |
| 4360 — 4367 | RAF Northolt |
| 4362 — 4367 | Coventry Approach |
| 4370 — 4377 | Anglia Radar
Ireland Domestic RNAS Yeovilton |
| 4400 | NATO Aircraft receiving a service from AEW aircraft |
| 4401 — 4427 | Transit (ORCAM) Brussels |
| 4430 — 4477 | Assigned by CCAMS |
| 4500 | NATO Aircraft receiving a service from AEW aircraft |
| * 4501 | Lands End GNSS Approach |
| * 4501 | Wattisham Conspicuity |
| 4501 — 4505 | RAF Linton-on-Ouse |
| 4501 — 4516 | Oxford Approach |
| 4501 — 4517 | Prestwick Approach |
| 4502 — 4547 | Wattisham Approach |
| *4506 | RAF Linton-on-Ouse Conspicuity |
| 4507 — 4527 | RAF Linton-on-Ouse |
| * 4517 | Oxford SSR Frequency Monitoring Code |
| * 4520 | Prestwick Conspicuity |
| * 4520 | Oxford Approach Basic Service |
| * 4521 — 4527 | West Wales Radar (NQY) |
| * 4530 | RAF Linton-on-Ouse Conspicuity |
| * 4530 | MoD Aberporth Conspicuity |
| 4530 — 4546 | Plymouth (Military) Radar |
| 4531 — 4537 | RAF Linton-on-Ouse |
| 4531 — 4537 | MoD Aberporth |
| * 4540 | RAF Linton-on-Ouse Conspicuity |
| * 4540 — 4542 | MoD Aberporth |
| 4541 — 4547 | RAF Linton-on-Ouse |
| * 4543 | West Wales Airport UAS Conspicuity Code. Shall only be selected with AFIS direction. |
| * 4547 | Plymouth (Military) Radar conspicuity |
| 4550 — 4567 | Plymouth (Military) Radar |
| 4550 — 4567 | Isle of Man |
| 4550 — 4571 | East Midlands Approach |
| * 4572 | Aircraft operating outside of East Midlands Controlled Airspace/Zone and monitoring East Midlands Radar frequency |
| * 4572 | Farnborough LARS West SSR Monitoring Code |
| * 4573 | East Midlands Approach Conspicuity |
| * 4574 | Not currently allocated for use in the UK FIR |
| * 4575 | RAF Leeming/RAF Linton-on-Ouse
Southend Airport Conspicuity |
| * 4576 | RAF Colerne Conspicuity |
| * 4576 | Vale of York AIAA Conspicuity |
| 4577 | Vale of York AIAA Conspicuity |
| 4600 | NATO Aircraft receiving a service from AEW aircraft |
| * 4601 | Hawarden Conspicuity |
| * 4601 | MoD Ops in Salisbury Plain Training Area |
| 4602 — 4606 | Hawarden Approach |
| 4602 — 4607 |
Anglia Radar |
| * 4607 | Hawarden Frequency Monitoring Code |
| 4610 — 4667 | Swanwick (Military) |
| 4670 — 4676 | TC Stansted/TC Luton |
| * 4677 | Carlisle Airport Conspicuity
Luton Airport Tower Conspicuity |
| 4700 | NATO Aircraft receiving a service from AEW aircraft |
| 4701 — 4777 | Assigned by CCAMS |
| Codes / Series | Controlling Authority / Function |
|---|---|
| 5000 | NATO Aircraft receiving a service from AEW aircraft |
| 5001 — 5012 | London Control Non-Standard Flights |
| 5013 — 5017 | Assigned by CCAMS |
| 5020 — 5036 | Farnborough LARS North |
| * 5037 | Farnborough LARS North Conspicuity |
| 5040 — 5047 | Assigned by CAA |
| * 5050 | Liverpool Conspicuity |
| 5050 — 5067 | Bristol Approach
Southend Approach |
| 5051 — 5067 | Liverpool Airport |
| * 5070 | Bristol VFR Conspicuity |
| * 5070 — 5071 | RAF Syerston Conspicuity |
| 5071 — 5076 | Bristol Approach |
| * 5077 | Bristol Frequency Monitoring Code |
| 5100 | NATO Aircraft receiving a service from AEW aircraft |
| 5101 — 5177 | CRC Boulmer |
| 5200 | NATO Aircraft receiving a service from AEW aircraft |
| 5201 — 5270 | Assigned by CCAMS |
| 5271 — 5277 | Transit (ORCAM) Channel Islands |
| 5300 | NATO Aircraft receiving a service from AEW aircraft |
| 5301 — 5377 | Transit (ORCAM) Barcelona |
| 5400 | NATO Aircraft receiving a service from AEW aircraft |
| 5401 — 5477 | Assigned by CCAMS |
| 5500 | NATO Aircraft receiving a service from AEW aircraft |
| 5501 — 5577 | Transit (ORCAM) Barcelona |
| 5600 | NATO Aircraft receiving a service from AEW aircraft |
| 5601 — 5647 | Transit (ORCAM) Paris |
| 5650 — 5657 | Transit (ORCAM) Luxembourg |
| 5660 — 5664 | Allocated to NATS as CCAMS redundancy |
| 5665 — 5677 | Assigned by CCAMS |
| 5700 | NATO Aircraft receiving a service from AEW aircraft |
| 5701 — 5777 | Transit (ORCAM) Geneva |
| Codes / Series | Controlling Authority / Function |
|---|---|
| * 6000 | NATO – CAOC Uedem (activated by NOTAM via ASACS Force Command) |
| * 6001 — 6037 | Special Events (Activated by NOTAM) |
| 6040 — 6077 | Swanwick (Military) |
| * 6100 | NATO – CAOC Uedem (activated by NOTAM via ASACS Force Command) |
| 6101 — 6157 | Swanwick (Military) |
| * 6160 | Doncaster Sheffield Conspicuity |
| 6160 — 6176 | Inverness Approach |
| 6160 — 6176 | Cambridge Approach |
| 6160 — 6177 | Plymouth (Military) Radar |
| 6161 — 6167 | Doncaster Sheffield Approach |
| * 6170 | Aircraft operating outside of Doncaster Sheffield Controlled Airspace Zone and Monitoring Doncaster Sheffield Radar frequency |
| 6171 — 6177 | Doncaster Sheffield Approach |
| * 6177 | Cambridge Conspicuity |
| * 6177 | Inverness Conspicuity |
| * 6200 | NATO – CAOC Uedem (activated by NOTAM via ASACS Force Command) |
| 6201 — 6257 | Assigned by CCAMS |
| 6260 — 6277 | Transit (ORCAM) Amsterdam |
| * 6300 | NATO – CAOC Uedem (activated by NOTAM via ASACS Force Command) |
| 6301 — 6377 | Assigned by CCAMS |
| * 6400 | NATO – CAOC Uedem (activated by NOTAM via ASACS Force Command) |
| 6401 — 6457 | Swanwick (Military) Radar |
| 6460 — 6467 | Assigned by CCAMS – Not in use in the UK as these codes cause conflictions with France |
| 6470 — 6477 | Allocated to NATS as CCAMS redundancy |
| * 6500 | NATO – CAOC Uedem (activated by NOTAM via ASACS Force Command) |
| 6501 — 6577 | CRC Scampton |
| * 6600 | NATO – CAOC Uedem (activated by NOTAM via ASACS Force Command) |
| 6601 — 6677 | Transit (ORCAM) Germany |
| * 6700 | NATO – CAOC Uedem (activated by NOTAM via ASACS Force Command) |
| 6701 — 6777 | Transit (ORCAM) France |
| Codes / Series | Controlling Authority / Function |
|---|---|
| * 7000 | General conspicuity code |
| * 7001 | Military Fixed-wing Low Level Conspicuity/ Climb-out |
| * 7002 | Danger Areas General |
| * 7003 | Red Arrows Transit/Display |
| * 7004 | Conspicuity Aerobatics and Display |
| * 7005 | High-Energy Manoeuvres |
| * 7006 | Autonomous Operations within TRA and TRA (G) |
| 7007 | Open Skies Observation Aircraft |
| * 7010 | Operating in Aerodrome Traffic Pattern (Refer to ENR 1.6, paragraph 2.2.2.2) |
| * 7011 — 7013 | Assigned by CAA |
| 7014 — 7017 | Allocated to NATS as CCAMS redundancy |
| 7020 — 7027 | Assigned by CCAMS |
| * 7030 | RNAS Culdrose Conspicuity |
| 7030 — 7044 | Aldergrove Approach |
| 7030 — 7046 | TC Thames/TC Heathrow |
| 7030 — 7066 | Durham Tees Valley Airport |
| 7030 — 7077 | Aberdeen (Northern North Sea Off-shore) |
| 7031 — 7077 | RNAS Culdrose |
| * 7045 | Aircraft operating within 40 miles of Belfast/Aldergrove, operating outside of Belfast/Aldergrove CTR/Belfast TMA and monitoring Belfast/Aldergrove Approach frequency |
| 7046 — 7047 | Aldergrove Approach |
| * 7047 | TC Thames (Biggin Hill Airport Conspicuity)
RNAS Culdrose Conspicuity |
| 7050 — 7056 | TC Thames/TC Heathrow |
| * 7057 | TC Thames (London City Airport Conspicuity) |
| * 7066 | Lydd Approach VFR |
| * 7067 | Durham Tees Valley Airport Conspicuity Lydd Approach IFR |
| 7070 — 7076 | TC Thames/TC Heathrow |
| * 7077 | TC Thames (London Heliport Conspicuity) |
| * 7100 | SSR Code Saturation |
| 7101 — 7177 | Transit (ORCAM) Brussels |
| 7200 | RN Ships |
| 7201—7267 | Allocated to NATS as CCAMS redundancy |
| 7270 — 7277 | Assigned by CCAMS |
| * 7300 | UAS/RPA Lost Link |
| 7301 — 7327 | Assigned by CCAMS |
| 7330 — 7347 | Transit (ORCAM) Netherlands |
| * 7350 | Norwich Approach Conspicuity |
| 7350 — 7353 | RNAS Culdrose |
| 7350 — 7361 | MoD Ops in EG D701 (Hebrides) |
| 7350 — 7365 | Manchester Approach |
| 7350 — 7376 | Bournemouth Approach/LARS |
| 7351 — 7377 | Norwich Approach |
| * 7354 — 7355 | RNAS Culdrose Conspicuity |
| 7356 | RNAS Culdrose |
| *7357 | RNAS Culdrose Conspicuity |
| 7360—7367 | RNAS Culdrose |
| * 7362 | MoD Ops in EG D702 (Fort George) |
| * 7366 | Aircraft operating within 5 nm of Manchester CTR and maintaining a listening watch only on the Manchester Approach frequency |
| 7367 — 7373 | Manchester Approach |
| * 7374 | Dundee Airport IFR Procedural Approach |
| * 7375 | Manchester TMA and Woodvale Local Area (Woodvale UAS Conspicuity) |
| * 7376 | Dundee Airport VFR Conspicuity |
| * 7377 | Bournemouth Radar Conspicuity |
| * 7400 | MPA/DEFRA/Fishery Protection/METMAN
(Civil Contingency) Conspicuity |
| * 7401 | Scottish FIS |
| * 7402 | RAF Leuchars Conspicuity |
| 7402 — 7414 | TC Stansted/TC Luton |
| 7402 — 7417 | RAF Shawbury |
| 7402 — 7436
7402 — 7437 |
RNAS Yeovilton
Anglia Radar |
| 7403 — 7427 | RAF Leuchars |
| * 7417 | Cranfield Airport – IFR Conspicuity Purposes |
| * 7420 | RAF Shawbury Conspicuity |
| 7421 — 7425 | RAF Shawbury |
| * 7426 | RAF Shawbury Conspicuity |
| 7427 — 7437 | RAF Shawbury |
| * 7437 | RNAS Yeovilton Conspicuity |
| 7440 — 7477 | Transit (ORCAM) France |
| * 7500 | Special Purpose Code – Hi-Jacking |
| 7501 — 7507 | Assigned by CCAMS |
| 7510 — 7535 | Transit (ORCAM) Switzerland |
| 7536 — 7537 | Assigned by CCAMS |
| 7540 — 7547 | Transit (ORCAM) Germany |
| 7550 — 7567 | Transit (ORCAM) Paris |
| 7570 — 7577 | Assigned by CCAMS |
| * 7600 | Special Purpose Code – Radio Failure |
| 7601 — 7617 | Allocated to NATS as CCAMS Redundancy (Prestwick Upper) |
| 7620 — 7677 | Assigned by CCAMS |
| * 7700 | Special Purpose Code – Emergency |
| 7701 — 7775 | Assigned by CCAMS |
| * 7776 — 7777 | SSR Monitors |
