Chapter 6 - Air Traffic Services Flashcards
Air Traffic Services
What are the principle objectives of the air traffic services?
- Prevent collisions in the air
- Prevent collisions between aircraft on the manoeuvring area and obstructions on that area
- Expedite and maintain an orderly flow of traffic
- Provide advice and information useful for the safe and efficient conduct of flight
- Notify Search and Rescue where required
What dictates the need for ATS?
- Types of traffic
- Density of traffic
- Meteorological conditions
Which classification of airspace is reserved for only IFR flights?
Class A
What services are provided by Area Control Services?
- ATC for IFR flights
- FIS and Alerting Service
- Distress and Diversion Service
What is ATC at an aerodrome responsible for?
The control of all aircraft in the vicinity of the aerodrome and on the manoeuvring area
How is aerodrome ATC usually split?
Between Aerodrome Control and Approach Control
How may Aerodrome Control further be split?
Into ‘Tower’ and ‘Ground’
What are the respective responsibilities of Ground and Tower?
Ground is responsible for aircraft on the movement area (except active runway)
Tower is responsible for aircraft on the runway as well as those in, or joining the circuit
For what may Approach Control be responsible?
Traffic departing the circuit
Traffic joining IFR or VFR
Traffic operating in the vicinity of the aerodrome
Approach Control may be provided…radar
With or without
Control Zones are usually staffed by controllers…radar
With access to
What is usually provided within controlled airspace?
A Radar Control Service
When (other than for emergency purposes) may a pilot deviate from an instruction issued within controlled airspace?
When an alternative has been requested by the pilot and granted by the controller
How may non-radio aircraft be given instructions by the tower?
Lamp or pyrotechnics
Signals in the signal square
In what situation is a FIS provided?
At some aerodromes which do not have ATC
A FIS is…to give instructions to aircraft in the air because it is an…
NOT permitted
Information Service
How may a FIS be identified?
Its callsign may be appended by the suffix ‘Information’
When an instruction is given to an aircraft on the ground by an AFIS, a pilot…comply
Should
A UK aerodrome which provides neither ATC nor a FIS, may provide…
An Air/Ground Communications Service (ACGS)
How may an AGCS be identified?
Its callsign may be appended by the suffix ‘Radio’
On which frequency may aircraft communicate if an airfield does not have an allocated frequency? What is this called?
135.475
Safetycom
What are the minima for using Safetycom?
Must be below 2,000 ft aal or below 1,000 ft above promulgated circuit height
Must be within 10nm of the aerodrome
What is LARS and what are the recommended circumstances surrounding its use?
Lower Airspace Radar Service
Unregulated airspace up to FL100
What may be provided by LARS and within what radius?
The Traffic Service or the Deconfliction Service
Within approximately 30nm
When should it be assumed that the station is not operating?
After three unsuccessful contact attempts have been made
What is provided by a Flight Information Service?
Weather
Serviceability of Radio Navaids
Aerodrome conditions
Other reported traffic
How else may a FIS be known?
A Basic Service
What is a procedural service?
A normal radar ATC service mainly used to separate IFR traffic by time and/or distance using an approach control service
In Class G airspace, …is responsible for collision avoidance and…
The pilot
Terrain clearance
What are the services available outside controlled airspace?
Basic Service
Traffic Service
Deconfliction Service
Procedural Service
What is provided with all services outside of controlled airspace?
An alerting service
What should be requested from a FISO?
Basic service only
Why may traffic or deconfliction service be reduced by a FISO?
High workload
Areas of high traffic density
When traffic is not displayed to a controller
When aircraft are operating close the limits of radar cover
Outside of controlled airspace, any instructions…
Are not mandatory
While not mandatory, the relationship between a FISO unit and a pilot is considered to be…
An agreement
What is the intention of an agreement between a FISO and a pilot?
To facilitate the safe use of the airspace by allowing forward coordination between ATCUs on the pilot’s course of action
In entering agreements, pilots must ensure that…
They are able to comply with their responsibilities in relation to the Rules of the Air and terrain clearance
When (other than for reasons of safety) may a pilot deviate from an agreement with an ATCU?
Only once having advised the controller and obtained a response