Holding patterns are not precise due to variations in aircraft type, speed, and performance. In holding patterns, aircraft reduce their speed to comply with holding criteria, which directly impacts their rate of descent. This is a key reason why vacated levels are not immediately allocated to other aircraft in the same holding stack.
Vertical separation is also provided to other aircraft in holding. Pattern width varies with the holding altitude. Higher the holding level bigger will be the holding area. Procedural controller needs to apply 5 minutes separation from this holding area. ATS authorities publishes criteria used in such cases based on the Safety assessments and flight test at different levels.
First I will reply to your second question, Yes! This is used in procedural separation(as well as in Radar) in Area, Approach control both. Now back to the first part, suppose you are flying northerly on a heading of 360 degree your track will be 000. So as per definition opposite track is moving opposite to you means it will be flying on a Southerly heading and it should be from 315 to 045 degrees means on a track of 135 to 225. You need to draw your position and check this you will better understand.
Sir, Longitudinal separations are defined based on the track difference between the first aircraft and the conflict aircraft. First we have discussed the same track -Same direction or crossing tracks (or a portion thereof) with an angle of less than 45 degrees on each side of the track. In other words less than 45 degrees or more than 315 degrees. Here we are trying to find out the aircraft which are moving in the same direction of our first aircraft and the angle between these aircraft if less than 45 degrees both sides of the first aircraft they are called the same track aircraft. Now, in other words less than 45 degrees is understood by you. You have a question regarding the other track difference which is mentioned more than 315 degrees. Assume your first aircraft is on 090 degrees so add 315 to it, 415. But the compass has 360 degree thus subtract 360 so it will become more than 45 degrees and on the other side less than 45. For better understanding l, You just draw your first aircraft on 360 degree and check less than 45 and more than 315 , the drawing will help you to better understand this. Thank you for watching ☺️.
thank you for explaining clearly and in a concise way
Glad it was helpful!
Appreciate the well researched content and sources provided
Thank you
why atc cannot apply vertical separation for the ac establishing the same holding pattern ?
Holding patterns are not precise due to variations in aircraft type, speed, and performance.
In holding patterns, aircraft reduce their speed to comply with holding criteria, which directly impacts their rate of descent. This is a key reason why vacated levels are not immediately allocated to other aircraft in the same holding stack.
Vertical separation is also provided to other aircraft in holding.
Pattern width varies with the holding altitude. Higher the holding level bigger will be the holding area.
Procedural controller needs to apply 5 minutes separation from this holding area.
ATS authorities publishes criteria used in such cases based on the Safety assessments and flight test at different levels.
still not understanding ,,plz give example of oppisite track sep..plz (are they sepraton using for area control ?)
First I will reply to your second question, Yes! This is used in procedural separation(as well as in Radar) in Area, Approach control both.
Now back to the first part, suppose you are flying northerly on a heading of 360 degree your track will be 000. So as per definition opposite track is moving opposite to you means it will be flying on a Southerly heading and it should be from 315 to 045 degrees means on a track of 135 to 225.
You need to draw your position and check this you will better understand.
Very useful information
Glad you liked it
Sir , are you ATC? Where are you posted sir?
Yes Dear.
Thanks a lot
19:58 shouldn't it be 135° and not 315° ??
Sir, Longitudinal separations are defined based on the track difference between the first aircraft and the conflict aircraft. First we have discussed the same track -Same direction or crossing tracks (or a portion thereof) with an angle of less than 45 degrees on each side of the track. In other words less than 45 degrees or more than 315 degrees. Here we are trying to find out the aircraft which are moving in the same direction of our first aircraft and the angle between these aircraft if less than 45 degrees both sides of the first aircraft they are called the same track aircraft. Now, in other words less than 45 degrees is understood by you. You have a question regarding the other track difference which is mentioned more than 315 degrees. Assume your first aircraft is on 090 degrees so add 315 to it, 415. But the compass has 360 degree thus subtract 360 so it will become more than 45 degrees and on the other side less than 45. For better understanding l, You just draw your first aircraft on 360 degree and check less than 45 and more than 315 , the drawing will help you to better understand this. Thank you for watching ☺️.
@@AVIATIONAIRTRAFFICCONTROL thanks for clarification 😊
thank you