Which of the following is NOT an ATS service?

The service that is not classified as an Air Traffic Service (ATS) is Emergency Services. While emergency services are crucial for aviation safety and may involve coordination with air traffic authorities, they do not fall under the standard umbrella of ATS services.

Air Traffic Services primarily include managing and guiding aircraft within controlled airspace and during takeoff and landing. This encompasses information services, which provide pilots with essential data about weather and flight conditions; advisory services, which offer assistance when operations are being conducted in uncontrolled airspace; and control services, which directly manage the flow of aircraft to ensure safe distances and sequences during flight.

Emergency services, on the other hand, are typically engaged when there is an urgent situation, such as a flight distress or a medical emergency on board. While they are pivotal to handling such scenarios in aviation, they do not represent the ongoing, regulatory controls and communications established by ATS. This distinction highlights the specific functions and responsibilities that define air traffic services within the aviation industry.