Separation Flashcards
Non RVSM separation
1000ft below FL290
2000ft above FL290
RVSM separation
1000ft below FL410
2000ft above FL410
When can climb or descent separation be maintained visually
Requested by pilot = agreed by second pilot
Classes D / E only
Vmc
Day
Below 10,000ft
What is lateral separation based on
Depends on nav air ac has passed
VOR = divergence 15° at 15nm NDB = 30° at 15nm DR = 45° at 15nm
What is same track
Converge by angular difference less than 45°
What is reciprocal track
Tracks converge / diverge more than 135° but less than 225°
What is crossing track
Intersect at angles of 45° to 135°
Or
225° to 315°
Longitudinal time based separation same track
15 mins = standard / min
10 mins = if lots of nav aids
5 mins = first aircraft has 20 knots faster (if passed over same fix)
3mins = same as above except 40kts
Longitudinal separation = time based = crossing track
15 mins = normal / standard
10mins = lord of nav aids
Longitudinal separation time based climbing or descending same track
15 mins standard / min
10 mins = if lots of nav aids
5 mins = if within 10 mins of 2nd ac being over a reporting point
Longitudinal separation time based reciprocal tracks climbing / descending
Can’t climb or descend of within 10 mins of passing point
= 20 mins of each other
Longitudinal separation distance based DME same track / crossing tracks
20nm = standard / min
10 nm = reduced if 1st ac >20kts faster
Distances based separation climbing or descending
10 nm = standard / min
Distances based separation DME reciprocal track
Passed by 10nm
Longitudinal separation Mach number
0 Mach difference = 10 mins
All the rest add up to 11
0.01 difference = 10 min separation
RNAV separation
150kms (80nm)
Except
RNP 10 = 50 nm
RNP 20 = 80nm
Radar based separation
5nm = standard / min
3 nm = when radar permits
2.5nm when both on same localiser + within 10nm I’d threshold
2nm = mode 2 parallel runway ops and ac on adjacent localisers after final app fix
What is a heavy aircraft
> 136,000kg
What is a medium aircraft
7000-136,000kg
What is a light aircraft
<7000kg
Separation for medium behind a heavy arriving
2 mins
Separation for a light behind a medium or heavy arriving
3 mins
Separation for a light / medium behind a heavy
Or light behind a medium
Departing
2 mins
For:
Using same runway
Parallel runway separated by <760m
Vertical separation <1000ft
When is separation increases to 3mins for a light / medium behind a heavy (or L behind M) departing
From a intermediate part on same runway or an intermediate point on parallel runway
What is the separation for displaced threshold
2 mins when
L/M behind H
L behind M
Wake turbulence Separation for opposite direction
2 mins when:
L/ M behind H
L behind M
Low missed approaches
What is radar wake turbulence separation for heavy behind heavy
4nm
What is radar wake turbulence separation for heavy behind medium
5 nm
What is radar wake turbulence separation for heavy behind light
6nm
What is radar wake turbulence separation for medium behind light
5 nm
What is essential local traffic
Any a/c or vehicle or person which may constitute a collision or hazard to departing / arriving aircraft
What is essential traffic
Controlled traffic to which ATC separation is applicable
An aircraft will be cleared to take off when the preceding aircraft has
Passed upwind end of runway
Or
Made a turn away from runway
What is separation between IFR traffic departing
5 mins = standard
2 mins = predefined aircraft has a flight plan speed of 40kts greater than succeeding aircraft
1 mins = tracks diverge by more than 45°
When can a departing aircraft no longer depart in the opposite direction to arriving aircraft doing a straight in approach
When arriving aircraft within 5 mins of threshold
When can departing aircraft no longer take off in opposite direction to arriving traffic
Arriving aircraft has started procedure turn
When is a expected approach time usually given
Applicable to aircraft with 10 mins delay or more
Must be given to aircraft with 30 mins delay or more
No delay expected = delay up to 20mins
Will be revised by 5 min intervals