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The ceiling of airspace in areas where an approach control service is provided must not exceed 10,000 feet of AGL. Exceptions require staff review and specific authorization from the Vice President of System Operations Services. The safety of air traffic separation is conditional on the allocation and use of distinctive call signals. On request, ICAO grants them permanently to scheduled flights and to certain air forces and other military services for military flights. There are written call signs with a combination of 3 letters like KLM, BAW, VLG followed by flight number, such as AAL872, VLG1011. As such, they appear on flight plans and ATC radar tags. There are also audio or radio call signals used in radio contact between pilots and air traffic control. These are not always identical to their written equivalents. An example of an audio call would be „Speedbird 832“ instead of the written „BAW832.“ This is used to reduce the risk of confusion between ATC and aircraft.

By default, the call sign for another flight is the check-in number (tail number) of the aircraft, such as . B „N12345,“ „C-GABC“ or „EC-IZD.“ The short telephone tags for these tail numbers are the last 3 letters that use the NATO phonetic alphabet (i.e. the alpha-bravo-charlie alphabet spoken for C-GABC) or the last 3 numbers (i.e. three-four-five for N12345). In the United States, the prefix may be a type of aircraft, model or manufacturer instead of the first registration sign, z.B. could be „N11842“ „Cessna 842.“ [13] This shortcut is only allowed after the communication can end in each area. A. When an air navigation control body is informed of a risk of death, illness and/or other public health risk, the following information must be provided to the DEN: information that is considered essential for the safety of almost all aviation operations; The small number of accidents in which ATC is considered a cause or contribution factor therefore reflects the overall success of the ATC system. Road controllers issue clearances and instructions for air aircraft, and pilots are required to follow these instructions. Air traffic controllers also provide air navigation services to many smaller airports across the country, including stopover assistance and airport access clearance. Air traffic controllers meet a number of separation standards that define the minimum allowable distance between aircraft.

These distances vary depending on the equipment and procedures used to provide ATC services. Aircraft are classified according to their MTOM (maximum take-off weight) and separation times or minimum distances are applied successively to aircraft, so that aircraft following a higher MTOM aircraft get a greater distance than aircraft in the same or lower MTOM category. The details of the separation applied depend on the circumstances. B to know whether the planes use the same runways, parallel or crossing, and whether they use the same position or a launch or touchdown position.