UK

Traffic Service (UK) is an Aviation Term defined as: A Traffic Service is a surveillance ATS, where in addition to the provisions of a Basic Service, the controller provides specific surveillance derived traffic information to assist the pilot in avoiding other traffic. Controllers may provide headings and/or levels for the purposes of positioning and/or sequencing; [...]

Special VFR Flight (UK) is an Aviation Term defined as: A flight made at any time in a control zone which is Class A airspace or is in any other control zone in IMC or at night, in respect of which the appropriate air traffic control unit has given permission for the flight to be [...]

General Air Traffic (UK) is an Aviation Term defined as: Flights operating in accordance with civil air traffic procedures.

Decision Altitude/Height (UK) is an Aviation Term defined as: In relation to the operation of an aircraft at an aerodrome means a specified altitude/height in a precision approach at which a missed approach must be initiated if the required visual reference to continue the approach to land has not been established (ANO).

Controlled Airspace (UK) is an Aviation Term defined as: Airspace which has been notified as Class A, Class B, Class C, Class D or Class E airspace (ANO).