CH11 / AREA CONTROL SERVICE Flashcards
An aircraft is maintaining FL 150within airspace class O.Another aircraft below at FL 140 is receiving a clearance to descend to FL 70. It is severe turbulence in the area. When is the earliest that a clearance to descend to FL 140or below can be expected?
When the other aircraft has reported that it has descended through FL 130
The longitudinal separation minima between aircraft departed from the same aerodrome and following the same track, and the preceding aircraft is maintaining a true airspeed of 20kt or more faster than the succeeding aircraft, is:
5 minutes
The longitudinal separation minima based on time between aircraft at same cruising level where navigation aids permit frequent determination of position and speed and the preceeding aircraft is maintaining a true airspeed of 40kt or more faster than the succeeding aircraft, is:
3 minutes
The longitudinal separation minima based on time between aircraft at same cruising level where navigation aids permit frequent _determination of position and speed and the preceeding aircraft is maintaining a true airspeed of 20kt or more faster than the succeeding aircraft, is:
5 minutes
The longitudinal separation minima based on time between aircraft at same cruising level where navigation aids permit frequent determination of position and speed, is: (time)
10 minutes
The longitudinal separation minima between aircraft departed from the same aerodrome and following the same track, and the preceding aircraft is maintaining a true airspeed of 40kt or more faster than the succeeding aircraft, is:
3 minutes
The longitudinal separation minima based on distance using DME, and each aircraft “on track” uses DME stations, is:
20NM
When an aircraft will pass through the level of another aircraft on the same track, the following minimum longitudinal separation shall be provided: time
15 minutes at the time the level is crossed
“ESSENTIAL TRAFFIC” is that controlled flight to which the provision of separation by ATC is applicable, but which, in relation to a particular controlled flight is not separated therefore by the appropriate separation minima. Whenever separation minima is not applied. The following flights are considered essential traffic one to each other.
All IFR flights in controlled airspace and controlled VFR
Above FL 290 the vertical flight separation between aircraft on the same direction is:
4000ft
Track separation between aircraft using the same NDB shall be applied requiring the aircraft to fly:
At least 30° separated at a distance of 15NM or more from the facility
Track separation between aircraft using the same FIX shall be applied requiring the aircraft to fly:
At least 45° separated at a distance of 15NM or more from the FIX
If an ATC clearance is not suitable to the pilot in command of an aircraft:
He may request and, if practicable, obtain an amended clearance
The “VMC and own separation” ATC clearance is used for a controlled flight to cross the level of another controlled flight when:
Requested by the pilot, during the day light and authorized by the state overflown
A/C on same level converging track has separation
15min
What are the controlled IFR separation methods applied by ATC?
Vertical, horizontal and composite separation
The vertical IFR separation minimum being applied by ATC within a controlled airspace below FL 290 is:
1000ft (300m)
The vertical IFR separation minimum being applied by ATC within a controlled airspace above FL 290 is:
2000ft (600m)
Longitudinal separation minima based on distance using DME for aircraft at the same cruising level and track, provided that each aircraft utilises “on Track” DME stations and separation is checked by obtaining simultaneous DME readings, is: (distance)
20NM
A “RNAV” distance based separation minimum may be used at the time the level is crossed, provided that each aircraft reports its distance to or from the same “on track”way-point. This minimum is:
80NM
A VFR flight constitutes essential traffic to other VFR flights, when operating in controlled airspace classified as:
B
One minute separation may be used between departing aircraft if they are to fly on tracks diverging by at least:
45° immediately after take-off
Vertical or horizontal separation shall be provided between:
All flights in class A and B airspaces
The separation method whereby the vertical and horizontal separation may be reduced till a maximum of half the standard criteria is called:
Composite separation
Lateral separation for RNAV operations is when both aircraft are established on tracks which diverge by at least:
15 degrees
Cruising level IFR during cruise within controlled airspace shall be given as flight level (FL)
Above the transition altitude when applicable
Aircraft flying along the same track may be separated by DME-distances from the same DME and it is confirmed that the aircraft have passed each other. Specify the shortest difference in DME-distance to make it possible for one aircraft to climb or descend
10NM
Track separation between aircraft using the same VOR shall be applied requiring the aircraft to fly:
At least 15° separated at a distance of 15NM or more from the facility
ATC clearances are solely issued for:
Expediting and separating air traffic
The longitudinal separation minima based on DME, and each aircraft “on track” uses DME stations, is:
10NM provided that the leading aircraft maintains a true airspeed of 20kt or more faster than the succeeding aircraft
