ATS.TR.205 Provision of air traffic control service

SECTORS AND WORKING POSITIONS AT AIR TRAFFIC CONTROL UNITS The air traffic services provider should:

(a)determine the area of responsibility for individual control sectors within an air traffic control unit, when applicable;

(b)where there is more than one air traffic controller working position within a unit or sector, define the duties and responsibilities of the individual working positions.

PROVISION OF APPROACH CONTROL SERVICE Approach control service may be provided by a unit co-located with an area control centre (ACC), or by a control sector within an ACC.

FUNCTIONS OF AERODROME CONTROL TOWERS

(a)Aerodrome control towers should issue information, instructions and clearances to aircraft under their control to achieve a safe, orderly and expeditious flow of air traffic on and in the vicinity of an aerodrome with the objective of preventing collision(s) between:

(1)aircraft flying within the designated area of responsibility of the control tower, including the aerodrome traffic circuits;

(2)aircraft operating on the manoeuvring area;

(3)aircraft landing and taking off;

(4)aircraft and vehicles operating on the manoeuvring area; and

(5)aircraft on the manoeuvring area and obstructions on that area.

(b)Control of all flight operations on and in the vicinity of an aerodrome, as well as of vehicles and personnel on the manoeuvring area, should be continuously maintained by:

(1)visual observation, which can be achieved directly by out-of-the-window observation or through the use of a visual surveillance system; and

(2)an ATS surveillance system where available, in accordance with ATS.TR.245.

(c)If there are other aerodromes within a control zone, traffic at all aerodromes within such a zone should be coordinated so that traffic circuits do not conflict.

POSITIONS AT THE AERODROME CONTROL TOWER

(a)The functions of an aerodrome control tower may be performed by different control or working positions, such as:

(1)aerodrome air traffic controller, normally responsible for operations on the runway and aircraft flying within the area of responsibility of the aerodrome control tower;

(2)ground air traffic controller, normally responsible for traffic on the manoeuvring area with the exception of runways; and

(3)clearance delivery position, normally responsible for delivery of start-up and ATC clearances to departing IFR flights.

(b)Where parallel or near-parallel runways are used for simultaneous operations, individual aerodrome air traffic controllers should be responsible for operations on each of the runways.