![]() Clearance delivery. The ATC clearance for departing aircraft determines the route to be followed after departure (either an SID or some non-standard routing), the cleared level for the initial climb as well as any applicable restrictions (or lack thereof) and other information (e.g.which direction the aircraft must be facing when the procedure is complete). It may also be necessary to specify the direction of the pushback (e.g. This manoeuvre is to be approved by the TWR controller or the apron management, depending on the local procedures. In this case, a tug is used to push the aircraft back and align it with an apron taxiway. on an airbridge), it may not be possible to taxi forward. Pushback. Depending on how the aircraft is parked (e.g.due to the need to coordinate it with the approach controller. The latter, however, may not be available yet, e.g. Depending on the aerodrome and the particular traffic and weather situation the runway to be used can be discussed and the departure clearance can be passed and acknowledged. This initial contact is also the moment when the ATIS information is confirmed (or updated) and CTOT information is provided. in case an approaching aircraft is going to perform an emergency landing or the tower controller needs the start up delayed by a few minutes for sequencing reasons. Normally this request is approved unless there is a good reason to do otherwise, e.g. Start-up. The start-up request is often the first contact between the pilot and the TWR controller.Contrary to the Approach controller whose main task is to properly sequence the arrivals, the TWR controller spends more time serving the depatures. The TWR controller provides ATS during the start-up, taxi-out and take off phases of the flight. ![]() ![]() In any case however, maintaining high levels of safety remains the primary concern. If the traffic levels are low enough, the procedures may be more flexible to allow better accomodation of crew requests (e.g. For example, at busier aerodromes these are shifted towards uniformity and the reduction of verbal coordination between the tower and approach controllers. Note that these are not universal and are heavily influenced by the local procedures. The subsections below describe some typical actions and considerations related to the provision of ATS by TWR controllers. These are a relatively small part of the total traffic served by the TWR controller. There are three major types of traffic serverd by the TWR controller: However, this will visually resemble a real tower with large screens providing information from the remote cameras. The TWR controller may also work in an ops room in case a remote tower solution is used. By contrast, area and approach controllers work in operations (ops) rooms and their main tool is the situation display. The TWR controllers are situated at the aerodrome control tower as they rely mostly on visual observation to do their job. the airspace in the vicinity of the aerodrome.It should be noted that although the TWR controller communicates with aircraft on the apron(s) as well, this is not part of their area of responsibility. The tower (TWR) controller (also referred to as "aerodrome controller") is responsible for the provision of air traffic services to aerodrome traffic.
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