General: Speed Control

Question 1

When should speed control not be applied?

Answer 1

• In holding patterns, other than where published on approach charts
• In areas of thunderstorms / known turbulence

Question 2

What should ATCOs keep in mind when issuing speed control?

Answer 2

• The application of speed control should be appropriate for the phase of flight.
• Its application over a long period of time may affect aircraft fuel reserves & crew’s planned operating profile.
• Frequent changes of speed should be avoided.
• Pilot’s will adhere to the speed assigne dby ATC & will request ATC approval before making changes.
• Pilots unable to maintain assign speed will inform ATC asap

Question 3

At what speed range should aircraft be transferred from en-route to approach?

Answer 3

• 250 - 300kts

Question 4

How do ATCOs ensure aircraft operate in a clean configuation for as long as possible?

Answer 4

• Arriving aircraft should not be allocated a speed of less than 210kt (200 for props) unless within 20 track miles of the threshold.
• Then 150 - 180kts can be used.

Question 5

How far before touchdown can speed control be applied by ATCOs?

Answer 5

• Speed should not be applied to aircraft after passing a point 4NM from the threshold.
• Otherwise aircraft may have an unstabilised approach.
• (5NM for big jets)