ATS Surveillance Systems 1 Flashcards
As stated in MATS Part 1:
a) What do surveillance services comprise of?
b) What shall a controller do before providing any of the above services, and what does this action not imply?
a) Surveillance services comprise:
1) Separation of arriving, departing and en-route traffic
2) Vectoring
3) Position information to assist in the navigation of aircraft
4) Monitoring traffic to provide information to the procedural controller
5) Assistance to aircraft crossing controlled airspace
b) Before a controller provides any of the above services he shall either
1) Identify the aircraft, using a method appropriate to the surveillance system in use or,
2) Have had the identity of the aircraft transferred from another controller. The act of identifying an aircraft does not imply that a service is being given.
According to MATS 1, what may surveillance systems be used to provide, whether or not the aircraft has been identified?
Surveillance systems may (also) be used to provide the following, whether or not the aircraft has been identified:
1) Information on the position of aircraft likely to constitute a hazard
2) Avoiding action
3) Information about observed weather for pilots and other controllers and
4) Assistance to aircraft in emergency
As detailed in MATS 1, describe the Turn Method of establishing identification. Include any conditions and precautions to be taken.
An aircraft may be identified by ascertaining its heading and, following a period of track observation, correlating the observed movement of a particular Position Indication with:
1) The acknowledged execution of an instruction to alter heading by at least 30 degrees
2) One or more changes of heading of at least 30 degrees, as instructed by another controller
3) One or more changes of heading of at least 30 degrees reported by the pilot
A turn for identification does not constitute the provision of a surveillance service. However, controllers should take into consideration, terrain, other surveillance returns, PSR coverage and the RoA before instructing an aircraft to alter heading.
In using the turn method the controller shall:
1) Verify that the movements of not more than one Position Indication correspond with those of the aircraft
2) Exercise caution particularly when employing this method in areas where changes of aircraft heading are commonly made as a navigational routine.
As detailed in MATS 1, describe the Departing Aircraft Method of Identification. Include in your answer where particular care should be taken.
By observing and correlating the Position Indication of a departing aircraft to a known airborne time. Identification is to be achieved within one mile of the end of the runway unless otherwise authorised by the CAA.
Particular care should be taken to avoid confusion with aircraft overflying the aerodrome, making a missed approach, departing from an adjacent runway or holding overhead the aerodrome.
As defined in MATS 1, describe the Position Report Method of establishing identification, including precautions to be taken.
By correlating a particular Position Indication with a report from the pilot that the aircraft is:
1) Over an exact reporting point which is displayed on the situation display or,
2) At a particular distance not exceeding 30 miles on a particular radial from a co-located VOR/DME or TACAN (DME). The source facility must be displayed on the situation display, or
3) Over a notified visual reference point or prominent geographical feature, in either case approved for the purpose and displayed on the situation display, provided that the flight is operating with visual reference to the surface and at a height of 3,000ft or less above the surface.
The identification must follow a period of track observation sufficient to enable the controller to compare the movement of the Position Indication with the pilot’s reported route. The reported position and level of the aircraft must indicate that it is within known PSR cover.
This method must be reinforced by an alternative method if there is any doubt about the identification because of:
1) The close proximity of other returns, or
2) Inaccurate reporting from aircraft at high level or some distance from navigational facilities.
A pilot is to be informed as soon as his aircraft has been identified. When operating inside controlled airspace, the pilot of an aircraft need only be so informed if the identification is achieved by the turn method.
