Airspace & ATS Flashcards
What is FIR
FIR = Flight information region
it’s the first division of the world’s airspace
all airspaces in a state’s control is assigned to 1 or more FIRs
what are the services offered in FIR
FIS (flight info service) + Alerting service
FIR is divided into how many layers vertically?
2 layers -
lower and upper FIR
each have different flying rules dependign of flying traffic
boundary between lower and upper FIR differ from state to state
EXplain UFIR
Upper FIR boundary corresponds to the a VFR cruising level
Within an a FIR there are 2 types of airspaces
Controlled (with air traffic control) and uncontrolled (with no/little air traffic control)
In a controlled airpaces - there are further subdivisions
Control Area: volume of airspace whose lower limits are above the surface of the ground
Control zone: volume of airspace extends down to the ground
Control area
This is composed of: airways/volumes above airports knows as Terminal Manoeuvring areas
Lowest limit of control area is no less than 700 ft above ground level and can be expressed in height, altitude or Flight level
The upper limit is established if:
ATS is not provided above that upper limit
if there is another control area ontop, therefore the lower limit of one coinsides with the upper limit of the other
Control Zone
The lateral limits of the Control Zone contains the path of IFR flights arriving and departing under IMC
usually 9.3km lateral distance from the centre of aerodrome.
if control zone is within a control area, then the control zone extends towards the lower limit of the control area
Where to find info on ATS
Annex 11 has principles of ATS but states may have variations - publshed in PANS-ATM (doc 4444)
Objective of ATS
Excercise control and provide guidance to aircraft in order to maintain separation between aircraft and another aircraft or aircraft and obstacles
maintain and expediate orderly flow of air traffic
to provide info necessary for safe and efficienct conduct of flight
to assist in search and rescue operation/interception
ATS split into 3 parts
**ATC -air traffic control **
has ATC Unit to manage controlled airspace traffic
**FIS - Flight information services
**Provides pertinent info for all flights flying in a FIR
Delivered by FIC (flight info centre)
Alert services
Provides assistance to aircraft in distress flying in a FIR region
Delivered by FIC (flight info centre)
ATC is split into 3 parts
ATC Tower
Manage the traffic control at the aerodrome
Approach Control Unit
Manage approach, arrival and departure control at the Control zone
A unit may manage it for one aerodrome or multiple
Area control unit
manage the air traffic control of enroute flights.
Usually the name is prefixed by georgraphical name
“London ACC’
If Area Control services is limited - which unit can support?
service for enroute traffic can be handed to the Approach Control Unit
If there isn’t a dedicated Approach Control Unit, to whom can that service be handed to?
ATC Tower (aerodrome tower)
ATC Tower gets handed the following traffic:
Arriving Aircraft that are visual or after landing
Aircraft flying IMC just before entering the runway and before take off or after being airborn.