Air Traffic Services Outside Controlled Airspace
- CAA Guidance on UK Flight Information Services is available in CAP1434
In the UK, ATSOCAS are provided by both civil and military air traffic control units to a variety of airspace users ranging from commercial airliners to military fast jets and private pilots. The UK’s Air Traffic Services Outside Controlled Airspace offer four levels of service:
Basic Service A Basic Service is intended to offer the pilot maximum autonomy and is available to IFR flights in Class G airspace, or VFR flights in Class E and Class G airspace. If the ATCO or FISO are aware of airspace activity that may affect your flight they will tell you; however, this is subject to their workload and the avoidance of other traffic is solely the pilot’s responsibility. Maintain a good lookout.
Traffic Service Under a Traffic Service, an ATCO will use radar to provide you with detailed traffic information on specific conflicting aircraft; they will not provide you with deconfliction advice, regardless of your meteorological conditions. A Traffic Service is available to IFR flights in Class G airspace, or VFR flights in Class E and Class G airspace.
Deconfliction Service Only available to IFR flights in Class G airspace. An ATCO will use radar to provide you with detailed traffic information on specific conflicting aircraft AND advice on how to avoid that aircraft. However, the pilot retains responsibility for collision avoidance; you can opt not to follow the ATCO’s advice.
Procedural Service Only available to IFR flights. A non-surveillance service in which deconfliction advice is provided against other aircraft in receipt of a Procedural Service from the same ATCO; the ATCO will not be aware of any other aircraft. The pilot is responsible for collision avoidance. Maintain a good lookout.